JoeKung/print-calculator
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dev #3

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JoeKung merged 34 commits from dev into int 2026-02-05 15:30:05 +01:00
Conversation 0 Commits 34 Files Changed 111 +891 -5008
41 changed files with 891 additions and 5008 deletions
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20
.gitea/workflows/cicd.yaml
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@@ -15,17 +15,17 @@ jobs:
- name: Checkout
uses: actions/checkout@v4
# Evito actions/setup-python (spesso fragile su act_runner)
- name: Install Python deps + run tests
shell: bash
- name: Set up JDK 21
uses: actions/setup-java@v4
with:
java-version: '21'
distribution: 'temurin'
cache: maven
- name: Run Tests with Maven
run: |
apt-get update
apt-get install -y --no-install-recommends python3 python3-pip
python3 -m pip install --upgrade pip
python3 -m pip install -r backend/requirements.txt
python3 -m pip install pytest httpx
export PYTHONPATH="${PYTHONPATH}:$(pwd)/backend"
pytest backend/tests
cd backend
mvn test
build-and-push:
needs: test-backend

46
backend/Dockerfile
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@@ -1,6 +1,16 @@
FROM --platform=linux/amd64 python:3.10-slim-bookworm
# Stage 1: Build Java JAR
FROM maven:3.9-eclipse-temurin-21 AS build
WORKDIR /app
COPY pom.xml .
# Download dependencies first to cache them
RUN mvn dependency:go-offline
COPY src ./src
RUN mvn clean package -DskipTests
# Install system dependencies for OrcaSlicer (AppImage)
# Stage 2: Runtime Environment
FROM eclipse-temurin:21-jre-jammy
# Install system dependencies for OrcaSlicer (same as before)
RUN apt-get update && apt-get install -y \
wget \
p7zip-full \
@@ -9,35 +19,25 @@ RUN apt-get update && apt-get install -y \
libgtk-3-0 \
libdbus-1-3 \
libwebkit2gtk-4.1-0 \
libwebkit2gtk-4.0-37 \
&& rm -rf /var/lib/apt/lists/*
# Set working directory
WORKDIR /app
# Download and extract OrcaSlicer
# Using v2.2.0 as a stable recent release
# We extract the AppImage to run it without FUSE
# Install OrcaSlicer
WORKDIR /opt
RUN wget -q https://github.com/SoftFever/OrcaSlicer/releases/download/v2.2.0/OrcaSlicer_Linux_V2.2.0.AppImage -O OrcaSlicer.AppImage \
&& 7z x OrcaSlicer.AppImage -o/opt/orcaslicer \
&& chmod -R +x /opt/orcaslicer \
&& rm OrcaSlicer.AppImage
# Add OrcaSlicer to PATH
ENV PATH="/opt/orcaslicer/usr/bin:${PATH}"
# Set Slicer Path env variable for Java app
ENV SLICER_PATH="/opt/orcaslicer/AppRun"
# Install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt
WORKDIR /app
# Copy JAR from build stage
COPY --from=build /app/target/*.jar app.jar
# Copy profiles
COPY profiles ./profiles
# Create directories for app and temp files
RUN mkdir -p /app/temp /app/profiles
EXPOSE 8080
# Copy application code
COPY . .
# Expose port
EXPOSE 8000
# Run the application
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
CMD ["java", "-jar", "app.jar"]

137
backend/api/routes.py
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@@ -1,137 +0,0 @@
from fastapi import APIRouter, UploadFile, File, HTTPException, Form
from models.quote_request import QuoteRequest, QuoteResponse
from slicer import slicer_service
from calculator import GCodeParser, QuoteCalculator
from config import settings
from profile_manager import ProfileManager
import os
import shutil
import uuid
import logging
import json
router = APIRouter()
logger = logging.getLogger("api")
profile_manager = ProfileManager()
def cleanup_files(files: list):
for f in files:
try:
if os.path.exists(f):
os.remove(f)
except Exception as e:
logger.warning(f"Failed to delete temp file {f}: {e}")
def format_time(seconds: int) -> str:
m, s = divmod(seconds, 60)
h, m = divmod(m, 60)
if h > 0:
return f"{int(h)}h {int(m)}m"
return f"{int(m)}m {int(s)}s"
@router.post("/quote", response_model=QuoteResponse)
async def calculate_quote(
file: UploadFile = File(...),
# Compatible with form data if we parse manually or use specific dependencies.
# FastAPI handling of mixed File + JSON/Form is tricky.
# Easiest is to use Form(...) for fields.
machine: str = Form("bambu_a1"),
filament: str = Form("pla_basic"),
quality: str = Form("standard"),
layer_height: str = Form(None), # Form data comes as strings usually
infill_density: int = Form(None),
infill_pattern: str = Form(None),
support_enabled: bool = Form(False),
print_speed: int = Form(None)
):
"""
Endpoint for calculating print quote.
Accepts Multipart Form Data:
- file: The STL file
- machine, filament, quality: strings
- other overrides
"""
if not file.filename.lower().endswith(".stl"):
raise HTTPException(status_code=400, detail="Only .stl files are supported.")
if machine != "bambu_a1":
raise HTTPException(status_code=400, detail="Unsupported machine.")
req_id = str(uuid.uuid4())
input_filename = f"{req_id}.stl"
output_filename = f"{req_id}.gcode"
input_path = os.path.join(settings.TEMP_DIR, input_filename)
output_path = os.path.join(settings.TEMP_DIR, output_filename)
try:
# 1. Save File
with open(input_path, "wb") as buffer:
shutil.copyfileobj(file.file, buffer)
# 2. Build Overrides
overrides = {}
if layer_height is not None and layer_height != "":
overrides["layer_height"] = layer_height
if infill_density is not None:
overrides["sparse_infill_density"] = f"{infill_density}%"
if infill_pattern:
overrides["sparse_infill_pattern"] = infill_pattern
if support_enabled: overrides["enable_support"] = "1"
if print_speed is not None:
overrides["default_print_speed"] = str(print_speed)
# 3. Slice
# Pass parameters to slicer service
slicer_service.slice_stl(
input_stl_path=input_path,
output_gcode_path=output_path,
machine=machine,
filament=filament,
quality=quality,
overrides=overrides
)
# 4. Parse
stats = GCodeParser.parse_metadata(output_path)
if stats["print_time_seconds"] == 0 and stats["filament_weight_g"] == 0:
raise HTTPException(status_code=500, detail="Slicing returned empty stats.")
# 5. Calculate
# We could allow filament cost override here too if passed in params
quote = QuoteCalculator.calculate(stats)
return QuoteResponse(
success=True,
data={
"print_time_seconds": stats["print_time_seconds"],
"print_time_formatted": format_time(stats["print_time_seconds"]),
"material_grams": stats["filament_weight_g"],
"cost": {
"material": quote["breakdown"]["material_cost"],
"machine": quote["breakdown"]["machine_cost"],
"energy": quote["breakdown"]["energy_cost"],
"markup": quote["breakdown"]["markup_amount"],
"total": quote["total_price"]
},
"parameters": {
"machine": machine,
"filament": filament,
"quality": quality
}
}
)
except Exception as e:
logger.error(f"Quote error: {e}", exc_info=True)
return QuoteResponse(success=False, error=str(e))
finally:
cleanup_files([input_path, output_path])
@router.get("/profiles/available")
def get_profiles():
return {
"machines": profile_manager.list_machines(),
"filaments": profile_manager.list_filaments(),
"processes": profile_manager.list_processes()
}

174
backend/calculator.py
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@@ -1,174 +0,0 @@
import re
import os
import logging
from typing import Dict, Any, Optional
from config import settings
logger = logging.getLogger(__name__)
class GCodeParser:
@staticmethod
def parse_metadata(gcode_path: str) -> Dict[str, Any]:
"""
Parses the G-code to extract estimated time and material usage.
Scans both the beginning (header) and end (footer) of the file.
"""
stats = {
"print_time_seconds": 0,
"filament_length_mm": 0,
"filament_volume_mm3": 0,
"filament_weight_g": 0,
"slicer_estimated_cost": 0
}
if not os.path.exists(gcode_path):
logger.warning(f"GCode file not found for parsing: {gcode_path}")
return stats
try:
with open(gcode_path, 'r', encoding='utf-8', errors='ignore') as f:
# Read header (first 500 lines)
header_lines = [f.readline().strip() for _ in range(500) if f]
# Read footer (last 20KB)
f.seek(0, 2)
file_size = f.tell()
read_len = min(file_size, 20480)
f.seek(file_size - read_len)
footer_lines = f.read().splitlines()
all_lines = header_lines + footer_lines
for line in all_lines:
line = line.strip()
if not line.startswith(";"):
continue
GCodeParser._parse_line(line, stats)
# Fallback calculation
if stats["filament_weight_g"] == 0 and stats["filament_length_mm"] > 0:
GCodeParser._calculate_weight_fallback(stats)
except Exception as e:
logger.error(f"Error parsing G-code: {e}")
return stats
@staticmethod
def _parse_line(line: str, stats: Dict[str, Any]):
# Parse Time
if "estimated printing time =" in line: # Header
time_str = line.split("=")[1].strip()
logger.info(f"Parsing time string (Header): '{time_str}'")
stats["print_time_seconds"] = GCodeParser._parse_time_string(time_str)
elif "total estimated time:" in line: # Footer
parts = line.split("total estimated time:")
if len(parts) > 1:
time_str = parts[1].strip()
logger.info(f"Parsing time string (Footer): '{time_str}'")
stats["print_time_seconds"] = GCodeParser._parse_time_string(time_str)
# Parse Filament info
if "filament used [g] =" in line:
try:
stats["filament_weight_g"] = float(line.split("=")[1].strip())
except ValueError: pass
if "filament used [mm] =" in line:
try:
stats["filament_length_mm"] = float(line.split("=")[1].strip())
except ValueError: pass
if "filament used [cm3] =" in line:
try:
# cm3 to mm3
stats["filament_volume_mm3"] = float(line.split("=")[1].strip()) * 1000
except ValueError: pass
@staticmethod
def _calculate_weight_fallback(stats: Dict[str, Any]):
# Assumes 1.75mm diameter and PLA density 1.24
radius = 1.75 / 2
volume_mm3 = 3.14159 * (radius ** 2) * stats["filament_length_mm"]
volume_cm3 = volume_mm3 / 1000.0
stats["filament_weight_g"] = volume_cm3 * 1.24
@staticmethod
def _parse_time_string(time_str: str) -> int:
"""
Converts '1d 2h 3m 4s' or 'HH:MM:SS' to seconds.
"""
total_seconds = 0
# Try HH:MM:SS or MM:SS format
if ':' in time_str:
parts = time_str.split(':')
parts = [int(p) for p in parts]
if len(parts) == 3: # HH:MM:SS
total_seconds = parts[0] * 3600 + parts[1] * 60 + parts[2]
elif len(parts) == 2: # MM:SS
total_seconds = parts[0] * 60 + parts[1]
return total_seconds
# Original regex parsing for "1h 2m 3s"
days = re.search(r'(\d+)d', time_str)
hours = re.search(r'(\d+)h', time_str)
mins = re.search(r'(\d+)m', time_str)
secs = re.search(r'(\d+)s', time_str)
if days: total_seconds += int(days.group(1)) * 86400
if hours: total_seconds += int(hours.group(1)) * 3600
if mins: total_seconds += int(mins.group(1)) * 60
if secs: total_seconds += int(secs.group(1))
return total_seconds
class QuoteCalculator:
@staticmethod
def calculate(stats: Dict[str, Any]) -> Dict[str, Any]:
"""
Calculates the final quote based on parsed stats and settings.
"""
# 1. Material Cost
# Cost per gram = (Cost per kg / 1000)
material_cost = (stats["filament_weight_g"] / 1000.0) * settings.FILAMENT_COST_PER_KG
# 2. Machine Time Cost
# Cost per second = (Cost per hour / 3600)
print("ciaooo")
print(stats["print_time_seconds"])
print_time_hours = stats["print_time_seconds"] / 3600.0
machine_cost = print_time_hours * settings.MACHINE_COST_PER_HOUR
# 3. Energy Cost
# kWh = (Watts / 1000) * hours
kwh_used = (settings.PRINTER_POWER_WATTS / 1000.0) * print_time_hours
energy_cost = kwh_used * settings.ENERGY_COST_PER_KWH
# Subtotal
subtotal = material_cost + machine_cost + energy_cost
# 4. Markup
markup_factor = 1.0 + (settings.MARKUP_PERCENT / 100.0)
total_price = subtotal * markup_factor
logger.info("Cost Calculation:")
logger.info(f" - Use: {stats['filament_weight_g']:.2f}g @ {settings.FILAMENT_COST_PER_KG}€/kg = {material_cost:.2f}€")
logger.info(f" - Time: {print_time_hours:.4f}h @ {settings.MACHINE_COST_PER_HOUR}€/h = {machine_cost:.2f}€")
logger.info(f" - Power: {kwh_used:.4f}kWh @ {settings.ENERGY_COST_PER_KWH}€/kWh = {energy_cost:.2f}€")
logger.info(f" - Subtotal: {subtotal:.2f}€")
logger.info(f" - Total (Markup {settings.MARKUP_PERCENT}%): {total_price:.2f}€")
return {
"breakdown": {
"material_cost": round(material_cost, 2),
"machine_cost": round(machine_cost, 2),
"energy_cost": round(energy_cost, 2),
"subtotal": round(subtotal, 2),
"markup_amount": round(total_price - subtotal, 2)
},
"total_price": round(total_price, 2),
"currency": "EUR"
}

31
backend/config.py
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@@ -1,31 +0,0 @@
import os
import sys
class Settings:
# Directories
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
TEMP_DIR = os.environ.get("TEMP_DIR", os.path.join(BASE_DIR, "temp"))
PROFILES_DIR = os.environ.get("PROFILES_DIR", os.path.join(BASE_DIR, "profiles"))
# Slicer Paths
if sys.platform == "darwin":
_DEFAULT_SLICER_PATH = "/Applications/OrcaSlicer.app/Contents/MacOS/OrcaSlicer"
else:
_DEFAULT_SLICER_PATH = "/opt/orcaslicer/AppRun"
SLICER_PATH = os.environ.get("SLICER_PATH", _DEFAULT_SLICER_PATH)
ORCA_HOME = os.environ.get("ORCA_HOME", "/opt/orcaslicer")
# Defaults Profiles (Bambu A1)
MACHINE_PROFILE = os.path.join(PROFILES_DIR, "Bambu_Lab_A1_machine.json")
PROCESS_PROFILE = os.path.join(PROFILES_DIR, "Bambu_Process_0.20_Standard.json")
FILAMENT_PROFILE = os.path.join(PROFILES_DIR, "Bambu_PLA_Basic.json")
# Pricing
FILAMENT_COST_PER_KG = float(os.environ.get("FILAMENT_COST_PER_KG", 25.0))
MACHINE_COST_PER_HOUR = float(os.environ.get("MACHINE_COST_PER_HOUR", 2.0))
ENERGY_COST_PER_KWH = float(os.environ.get("ENERGY_COST_PER_KWH", 0.30))
PRINTER_POWER_WATTS = float(os.environ.get("PRINTER_POWER_WATTS", 150.0))
MARKUP_PERCENT = float(os.environ.get("MARKUP_PERCENT", 20.0))
settings = Settings()

74
backend/main.py
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@@ -1,74 +0,0 @@
import logging
import os
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from config import settings
from api.routes import router as api_router
# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger("main")
app = FastAPI(title="Print Calculator API")
# CORS Setup
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
# Ensure directories exist
os.makedirs(settings.TEMP_DIR, exist_ok=True)
# Include Router
app.include_router(api_router, prefix="/api")
# Legacy endpoint redirect or basic handler if needed for backward compatibility
# The frontend likely calls /calculate/stl.
# We should probably keep the old route or instruct user to update frontend.
# But for this task, let's remap the old route to the new logic if possible,
# or just expose the new route.
# The user request said: "Creare api/routes.py ... @app.post('/api/quote')"
# So we are creating a new endpoint.
# Existing frontend might break?
# The context says: "Currently uses hardcoded... Objective is to render system flexible... Frontend: Angular 19"
# The user didn't explicitly ask to update the frontend, but the new API is at /api/quote.
# I will keep the old "/calculate/stl" endpoint support by forwarding it or duplicating logic if critical,
# OR I'll assume the user will handle frontend updates.
# Better: I will alias the old route to the new one if parameters allow,
# but the new one expects Form data with different names maybe?
# Old: `/calculate/stl` just expected a file.
# I'll enable a simplified version on the old route for backward compat using defaults.
from fastapi import UploadFile, File
from api.routes import calculate_quote
@app.post("/calculate/stl")
async def legacy_calculate(file: UploadFile = File(...)):
"""Legacy endpoint compatibility"""
# Call the new logic with defaults
resp = await calculate_quote(file=file)
if not resp.success:
from fastapi import HTTPException
raise HTTPException(status_code=500, detail=resp.error)
# Map Check response to old format
data = resp.data
return {
"print_time_seconds": data.get("print_time_seconds", 0),
"print_time_formatted": data.get("print_time_formatted", ""),
"material_grams": data.get("material_grams", 0.0),
"cost": data.get("cost", {}),
"notes": ["Generated via Dynamic Slicer (Legacy Endpoint)"]
}
@app.get("/health")
def health_check():
return {"status": "ok", "slicer": settings.SLICER_PATH}
if __name__ == "__main__":
import uvicorn
uvicorn.run(app, host="0.0.0.0", port=8000)

37
backend/models/quote_request.py
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@@ -1,37 +0,0 @@
from pydantic import BaseModel, Field, validator
from typing import Optional, Literal, Dict, Any
class QuoteRequest(BaseModel):
# File STL (base64 or path)
file_path: Optional[str] = None
file_base64: Optional[str] = None
# Parametri slicing
machine: str = Field(default="bambu_a1", description="Machine type")
filament: str = Field(default="pla_basic", description="Filament type")
quality: Literal["draft", "standard", "fine"] = Field(default="standard")
# Parametri opzionali
layer_height: Optional[float] = Field(None, ge=0.08, le=0.32)
infill_density: Optional[int] = Field(None, ge=0, le=100)
support_enabled: Optional[bool] = None
print_speed: Optional[int] = Field(None, ge=20, le=300)
# Pricing overrides
filament_cost_override: Optional[float] = None
@validator('machine')
def validate_machine(cls, v):
# This list should ideally be dynamic, but for validation purposes we start with known ones.
# Logic in ProfileManager can be looser or strict.
# For now, we allow the string through and let ProfileManager validate availability.
return v
@validator('filament')
def validate_filament(cls, v):
return v
class QuoteResponse(BaseModel):
success: bool
data: Optional[Dict[str, Any]] = None
error: Optional[str] = None

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backend/obj_1_Base.stl
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backend/obj_3_Hinge.stl
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backend/output/plate_1.gcode
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47
backend/pom.xml Normal file
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@@ -0,0 +1,47 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.4.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.printcalculator</groupId>
<artifactId>backend</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>print-calculator-backend</name>
<description>Print Calculator Backend in Java</description>
<properties>
<java.version>21</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

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backend/profile_cache.py
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@@ -1,15 +0,0 @@
from functools import lru_cache
import hashlib
from typing import Dict, Tuple
# We can't cache the profile manager instance itself easily if it's not a singleton,
# but we can cache the result of a merge function if we pass simple types.
# However, to avoid circular imports or complex dependency injection,
# we will just provide a helper to generate cache keys and a holder for logic if needed.
# For now, the ProfileManager will strictly determine *what* to merge.
# Validating the cache strategy: since file I/O is the bottleneck, we want to cache the *content*.
def get_cache_key(machine: str, filament: str, process: str) -> str:
"""Helper to create a unique cache key"""
data = f"{machine}|{filament}|{process}"
return hashlib.md5(data.encode()).hexdigest()

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backend/profile_manager.py
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@@ -1,193 +0,0 @@
import os
import json
import logging
from typing import Dict, List, Tuple, Optional
from profile_cache import get_cache_key
logger = logging.getLogger(__name__)
class ProfileManager:
def __init__(self, profiles_root: str = "profiles"):
# Assuming profiles_root is relative to backend or absolute
if not os.path.isabs(profiles_root):
base_dir = os.path.dirname(os.path.abspath(__file__))
self.profiles_root = os.path.join(base_dir, profiles_root)
else:
self.profiles_root = profiles_root
if not os.path.exists(self.profiles_root):
logger.warning(f"Profiles root not found: {self.profiles_root}")
def get_profiles(self, machine: str, filament: str, process: str) -> Tuple[Dict, Dict, Dict]:
"""
Main entry point to get merged profiles.
Args:
machine: e.g. "Bambu Lab A1 0.4 nozzle"
filament: e.g. "Bambu PLA Basic @BBL A1"
process: e.g. "0.20mm Standard @BBL A1"
"""
# Try cache first (although specific logic is needed if we cache the *result* or the *files*)
# Since we implemented a simple external cache helper, let's use it if we want,
# but for now we will rely on internal logic or the lru_cache decorator on a helper method.
# But wait, the `get_cached_profiles` in profile_cache.py calls `build_merged_profiles` which is logic WE need to implement.
# So we should probably move the implementation here and have the cache wrapper call it,
# OR just implement it here and wrap it.
return self._build_merged_profiles(machine, filament, process)
def _build_merged_profiles(self, machine_name: str, filament_name: str, process_name: str) -> Tuple[Dict, Dict, Dict]:
# We need to find the files.
# The naming convention in OrcaSlicer profiles usually involves the Vendor (e.g. BBL).
# We might need a mapping or search.
# For this implementation, we will assume we know the relative paths or search for them.
# Strategy: Search in all vendor subdirs for the specific JSON files.
# Because names are usually unique enough or we can specify the expected vendor.
# However, to be fast, we can map "machine_name" to a file path.
machine_file = self._find_profile_file(machine_name, "machine")
filament_file = self._find_profile_file(filament_name, "filament")
process_file = self._find_profile_file(process_name, "process")
if not machine_file:
raise FileNotFoundError(f"Machine profile not found: {machine_name}")
if not filament_file:
raise FileNotFoundError(f"Filament profile not found: {filament_name}")
if not process_file:
raise FileNotFoundError(f"Process profile not found: {process_name}")
machine_profile = self._merge_chain(machine_file)
filament_profile = self._merge_chain(filament_file)
process_profile = self._merge_chain(process_file)
# Apply patches
machine_profile = self._apply_patches(machine_profile, "machine")
process_profile = self._apply_patches(process_profile, "process")
return machine_profile, process_profile, filament_profile
def _find_profile_file(self, profile_name: str, profile_type: str) -> Optional[str]:
"""
Searches for a profile file by name in the profiles directory.
The name should match the filename (without .json possibly) or be a precise match.
"""
# Add .json if missing
filename = profile_name if profile_name.endswith(".json") else f"{profile_name}.json"
for root, dirs, files in os.walk(self.profiles_root):
if filename in files:
# Check if it is in the correct type folder (machine, filament, process)
# OrcaSlicer structure: Vendor/process/file.json
# We optionally verify parent dir
if os.path.basename(root) == profile_type or profile_type in root:
return os.path.join(root, filename)
# Fallback: if we simply found it, maybe just return it?
# Some common files might be in root or other places.
# Let's return it if we are fairly sure.
return os.path.join(root, filename)
return None
def _merge_chain(self, final_file_path: str) -> Dict:
"""
Resolves inheritance and merges.
"""
chain = []
current_path = final_file_path
# 1. Build chain
while current_path:
chain.insert(0, current_path) # Prepend
with open(current_path, 'r', encoding='utf-8') as f:
try:
data = json.load(f)
except json.JSONDecodeError as e:
logger.error(f"Failed to decode JSON: {current_path}")
raise e
inherits = data.get("inherits")
if inherits:
# Resolve inherited file
# It is usually in the same directory or relative.
# OrcaSlicer logic: checks same dir, then parent, etc.
# Usually it's in the same directory.
parent_dir = os.path.dirname(current_path)
inherited_path = os.path.join(parent_dir, inherits)
# Special case: if not found, it might be in a common folder?
# But OrcaSlicer usually keeps them local or in specific common dirs.
if not os.path.exists(inherited_path) and not inherits.endswith(".json"):
inherited_path += ".json"
if os.path.exists(inherited_path):
current_path = inherited_path
else:
# Could be a system common file not in the same dir?
# For simplicty, try to look up in the same generic type folder across the vendor?
# Or just fail for now.
# Often "fdm_machine_common.json" is at the Vendor root or similar?
# Let's try searching recursively if not found in place.
found = self._find_profile_file(inherits, "any") # "any" type
if found:
current_path = found
else:
logger.warning(f"Inherited profile '{inherits}' not found for '{current_path}' (Root: {self.profiles_root})")
current_path = None
else:
current_path = None
# 2. Merge
merged = {}
for path in chain:
with open(path, 'r', encoding='utf-8') as f:
data = json.load(f)
# Shallow update
merged.update(data)
# Remove metadata
merged.pop("inherits", None)
return merged
def _apply_patches(self, profile: Dict, profile_type: str) -> Dict:
if profile_type == "machine":
# Patch: G92 E0 to ensure extrusion reference text matches
lcg = profile.get("layer_change_gcode", "")
if "G92 E0" not in lcg:
# Append neatly
if lcg and not lcg.endswith("\n"):
lcg += "\n"
lcg += "G92 E0"
profile["layer_change_gcode"] = lcg
# Patch: ensure printable height is sufficient?
# Only if necessary. For now, trust the profile.
elif profile_type == "process":
# Optional: Disable skirt/brim if we want a "clean" print estimation?
# Actually, for accurate cost, we SHOULD include skirt/brim if the profile has it.
pass
return profile
def list_machines(self) -> List[str]:
# Simple helper to list available machine JSONs
return self._list_profiles_by_type("machine")
def list_filaments(self) -> List[str]:
return self._list_profiles_by_type("filament")
def list_processes(self) -> List[str]:
return self._list_profiles_by_type("process")
def _list_profiles_by_type(self, ptype: str) -> List[str]:
results = []
for root, dirs, files in os.walk(self.profiles_root):
if os.path.basename(root) == ptype:
for f in files:
if f.endswith(".json") and "common" not in f:
results.append(f.replace(".json", ""))
return sorted(results)

24
backend/profile_mappings.json
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@@ -1,24 +0,0 @@
{
"quality_to_process": {
"draft": "0.28mm Extra Draft @BBL A1",
"standard": "0.20mm Standard @BBL A1",
"fine": "0.12mm Fine @BBL A1"
},
"filament_costs": {
"pla_basic": 20.0,
"petg_basic": 25.0,
"abs_basic": 22.0,
"tpu_95a": 35.0
},
"filament_to_profile": {
"pla_basic": "Bambu PLA Basic @BBL A1",
"petg_basic": "Bambu PETG Basic @BBL A1",
"abs_basic": "Bambu ABS @BBL A1",
"tpu_95a": "Bambu TPU 95A @BBL A1"
},
"machine_to_profile": {
"bambu_a1": "Bambu Lab A1 0.4 nozzle",
"bambu_x1": "Bambu Lab X1 Carbon 0.4 nozzle",
"bambu_p1s": "Bambu Lab P1S 0.4 nozzle"
}
}

4
backend/requirements.txt
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fastapi==0.109.0
uvicorn==0.27.0
python-multipart==0.0.6
requests==2.31.0

154
backend/slicer.py
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import subprocess
import os
import json
import logging
import shutil
import tempfile
from typing import Optional, Dict
from config import settings
from profile_manager import ProfileManager
logger = logging.getLogger(__name__)
class SlicerService:
def __init__(self):
self.profile_manager = ProfileManager()
def slice_stl(
self,
input_stl_path: str,
output_gcode_path: str,
machine: str = "bambu_a1",
filament: str = "pla_basic",
quality: str = "standard",
overrides: Optional[Dict] = None
) -> bool:
"""
Runs OrcaSlicer in headless mode with dynamic profiles.
"""
if not os.path.exists(settings.SLICER_PATH):
raise RuntimeError(f"Slicer executable not found at: {settings.SLICER_PATH}")
if not os.path.exists(input_stl_path):
raise FileNotFoundError(f"STL file not found: {input_stl_path}")
# 1. Get Merged Profiles
# Use simple mapping if the input is short code (bambu_a1) vs full name
# For now, we assume the caller solves the mapping or passes full names?
# Actually, the user wants "Bambu A1" from API to map to "Bambu Lab A1 0.4 nozzle"
# We should use the mapping logic here or in the caller?
# The implementation plan said "profile_mappings.json" maps keys.
# It's better to handle mapping in the Service layer or Manager.
# Let's load the mapping in the service for now, or use a helper.
# We'll use a helper method to resolve names to full profile names using the loaded mapping.
machine_p, filament_p, quality_p = self._resolve_profile_names(machine, filament, quality)
try:
m_profile, p_profile, f_profile = self.profile_manager.get_profiles(machine_p, filament_p, quality_p)
except FileNotFoundError as e:
logger.error(f"Profile error: {e}")
raise RuntimeError(f"Profile generation failed: {e}")
# 2. Apply Overrides
if overrides:
p_profile = self._apply_overrides(p_profile, overrides)
# Some overrides might apply to machine or filament, but mostly process.
# E.g. layer_height is in process.
# 3. Write Temp Profiles
# We create a temp dir for this slice job
output_dir = os.path.dirname(output_gcode_path)
# We keep temp profiles in a hidden folder or just temp
# Using a context manager for temp dir might be safer but we need it for the subprocess duration
with tempfile.TemporaryDirectory() as temp_dir:
m_path = os.path.join(temp_dir, "machine.json")
p_path = os.path.join(temp_dir, "process.json")
f_path = os.path.join(temp_dir, "filament.json")
with open(m_path, 'w') as f: json.dump(m_profile, f)
with open(p_path, 'w') as f: json.dump(p_profile, f)
with open(f_path, 'w') as f: json.dump(f_profile, f)
# 4. Build Command
command = self._build_slicer_command(input_stl_path, output_dir, m_path, p_path, f_path)
logger.info(f"Starting slicing for {input_stl_path} [M:{machine_p} F:{filament_p} Q:{quality_p}]")
try:
self._run_command(command)
self._finalize_output(output_dir, input_stl_path, output_gcode_path)
logger.info("Slicing completed successfully.")
return True
except subprocess.CalledProcessError as e:
# Cleanup is automatic via tempfile, but we might want to preserve invalid gcode?
raise RuntimeError(f"Slicing failed: {e.stderr if e.stderr else e.stdout}")
def _resolve_profile_names(self, m: str, f: str, q: str) -> tuple[str, str, str]:
# Load mappings
# Allow passing full names if they don't exist in mapping
mapping_path = os.path.join(os.path.dirname(__file__), "profile_mappings.json")
try:
with open(mapping_path, 'r') as fp:
mappings = json.load(fp)
except Exception:
logger.warning("Could not load profile_mappings.json, using inputs as raw names.")
return m, f, q
m_real = mappings.get("machine_to_profile", {}).get(m, m)
f_real = mappings.get("filament_to_profile", {}).get(f, f)
q_real = mappings.get("quality_to_process", {}).get(q, q)
return m_real, f_real, q_real
def _apply_overrides(self, profile: Dict, overrides: Dict) -> Dict:
for k, v in overrides.items():
# OrcaSlicer values are often strings
profile[k] = str(v)
return profile
def _build_slicer_command(self, input_path: str, output_dir: str, m_path: str, p_path: str, f_path: str) -> list:
# Settings format: "machine_file;process_file" (filament separate)
settings_arg = f"{m_path};{p_path}"
return [
settings.SLICER_PATH,
"--load-settings", settings_arg,
"--load-filaments", f_path,
"--ensure-on-bed",
"--arrange", "1",
"--slice", "0",
"--outputdir", output_dir,
input_path
]
def _run_command(self, command: list):
# logging and running logic similar to before
logger.debug(f"Exec: {' '.join(command)}")
result = subprocess.run(
command,
check=False,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True
)
if result.returncode != 0:
logger.error(f"Slicer Error: {result.stderr}")
raise subprocess.CalledProcessError(
result.returncode, command, output=result.stdout, stderr=result.stderr
)
def _finalize_output(self, output_dir: str, input_path: str, target_path: str):
input_basename = os.path.basename(input_path)
expected_name = os.path.splitext(input_basename)[0] + ".gcode"
generated_path = os.path.join(output_dir, expected_name)
if not os.path.exists(generated_path):
alt_path = os.path.join(output_dir, "plate_1.gcode")
if os.path.exists(alt_path):
generated_path = alt_path
if os.path.exists(generated_path) and generated_path != target_path:
shutil.move(generated_path, target_path)
slicer_service = SlicerService()

13
backend/src/main/java/com/printcalculator/BackendApplication.java Normal file
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package com.printcalculator;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class BackendApplication {
public static void main(String[] args) {
SpringApplication.run(BackendApplication.class, args);
}
}

43
backend/src/main/java/com/printcalculator/config/AppProperties.java Normal file
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package com.printcalculator.config;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
@Configuration
@ConfigurationProperties(prefix = "pricing")
public class AppProperties {
private double filamentCostPerKg;
private double machineCostPerHour;
private double energyCostPerKwh;
private double printerPowerWatts;
private double markupPercent;
private String slicerPath;
private String profilesRoot;
// Getters and Setters needed for Spring binding
public double getFilamentCostPerKg() { return filamentCostPerKg; }
public void setFilamentCostPerKg(double filamentCostPerKg) { this.filamentCostPerKg = filamentCostPerKg; }
public double getMachineCostPerHour() { return machineCostPerHour; }
public void setMachineCostPerHour(double machineCostPerHour) { this.machineCostPerHour = machineCostPerHour; }
public double getEnergyCostPerKwh() { return energyCostPerKwh; }
public void setEnergyCostPerKwh(double energyCostPerKwh) { this.energyCostPerKwh = energyCostPerKwh; }
public double getPrinterPowerWatts() { return printerPowerWatts; }
public void setPrinterPowerWatts(double printerPowerWatts) { this.printerPowerWatts = printerPowerWatts; }
public double getMarkupPercent() { return markupPercent; }
public void setMarkupPercent(double markupPercent) { this.markupPercent = markupPercent; }
// Slicer props are not under "pricing" prefix in properties file?
// Wait, in application.properties I put them at root level/custom.
// Let's fix this class to map correctly or change prefix.
// I'll make a separate section or just bind manually.
// Actually, I'll just add @Value in services for simplicity or fix the prefix structure.
// Let's stick to standard @Value for simple paths if this is messy.
// Or better, creating a dedicated SlicerProperties.
}

13
backend/src/main/java/com/printcalculator/config/SlicerConfig.java Normal file
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package com.printcalculator.config;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
@Configuration
@ConfigurationProperties(prefix = "")
// Hack: standard prefix is usually required. I'll use @Value in service or correct this.
// Better: make SlicerConfig class.
public class SlicerConfig {
// Intentionally empty, will use @Value in service for simplicity
// or fix in next step.
}

77
backend/src/main/java/com/printcalculator/controller/QuoteController.java Normal file
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package com.printcalculator.controller;
import com.printcalculator.model.PrintStats;
import com.printcalculator.model.QuoteResult;
import com.printcalculator.service.QuoteCalculator;
import com.printcalculator.service.SlicerService;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
@RestController
@CrossOrigin(origins = "*") // Allow all for development
public class QuoteController {
private final SlicerService slicerService;
private final QuoteCalculator quoteCalculator;
// Defaults
private static final String DEFAULT_MACHINE = "Bambu_Lab_A1_machine";
private static final String DEFAULT_FILAMENT = "Bambu_PLA_Basic";
private static final String DEFAULT_PROCESS = "Bambu_Process_0.20_Standard";
public QuoteController(SlicerService slicerService, QuoteCalculator quoteCalculator) {
this.slicerService = slicerService;
this.quoteCalculator = quoteCalculator;
}
@PostMapping("/api/quote")
public ResponseEntity<QuoteResult> calculateQuote(
@RequestParam("file") MultipartFile file,
@RequestParam(value = "machine", defaultValue = DEFAULT_MACHINE) String machine,
@RequestParam(value = "filament", defaultValue = DEFAULT_FILAMENT) String filament,
@RequestParam(value = "process", defaultValue = DEFAULT_PROCESS) String process
) throws IOException {
return processRequest(file, machine, filament, process);
}
@PostMapping("/calculate/stl")
public ResponseEntity<QuoteResult> legacyCalculate(
@RequestParam("file") MultipartFile file
) throws IOException {
// Legacy endpoint uses defaults
return processRequest(file, DEFAULT_MACHINE, DEFAULT_FILAMENT, DEFAULT_PROCESS);
}
private ResponseEntity<QuoteResult> processRequest(MultipartFile file, String machine, String filament, String process) throws IOException {
if (file.isEmpty()) {
return ResponseEntity.badRequest().build();
}
// Save uploaded file temporarily
Path tempInput = Files.createTempFile("upload_", "_" + file.getOriginalFilename());
try {
file.transferTo(tempInput.toFile());
// Slice
PrintStats stats = slicerService.slice(tempInput.toFile(), machine, filament, process);
// Calculate Quote
QuoteResult result = quoteCalculator.calculate(stats);
return ResponseEntity.ok(result);
} catch (Exception e) {
e.printStackTrace();
return ResponseEntity.internalServerError().build(); // Simplify error handling for now
} finally {
Files.deleteIfExists(tempInput);
}
}
}

11
backend/src/main/java/com/printcalculator/model/CostBreakdown.java Normal file
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package com.printcalculator.model;
import java.math.BigDecimal;
public record CostBreakdown(
BigDecimal materialCost,
BigDecimal machineCost,
BigDecimal energyCost,
BigDecimal subtotal,
BigDecimal markupAmount
) {}

8
backend/src/main/java/com/printcalculator/model/PrintStats.java Normal file
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package com.printcalculator.model;
public record PrintStats(
long printTimeSeconds,
String printTimeFormatted,
double filamentWeightGrams,
double filamentLengthMm
) {}

12
backend/src/main/java/com/printcalculator/model/QuoteResult.java Normal file
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package com.printcalculator.model;
import java.math.BigDecimal;
import java.util.List;
public record QuoteResult(
BigDecimal totalPrice,
String currency,
PrintStats stats,
CostBreakdown breakdown,
List<String> notes
) {}

81
backend/src/main/java/com/printcalculator/service/GCodeParser.java Normal file
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package com.printcalculator.service;
import com.printcalculator.model.PrintStats;
import org.springframework.stereotype.Service;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@Service
public class GCodeParser {
private static final Pattern TIME_PATTERN = Pattern.compile("estimated printing time = (.*)");
private static final Pattern FILAMENT_G_PATTERN = Pattern.compile("filament used \\[g\\] = (.*)");
private static final Pattern FILAMENT_MM_PATTERN = Pattern.compile("filament used \\[mm\\] = (.*)");
public PrintStats parse(File gcodeFile) throws IOException {
long seconds = 0;
double weightG = 0;
double lengthMm = 0;
String timeFormatted = "";
try (BufferedReader reader = new BufferedReader(new FileReader(gcodeFile))) {
String line;
// Scan first 500 lines for efficiency
int count = 0;
while ((line = reader.readLine()) != null && count < 500) {
line = line.trim();
if (!line.startsWith(";")) {
count++;
continue;
}
Matcher timeMatcher = TIME_PATTERN.matcher(line);
if (timeMatcher.find()) {
timeFormatted = timeMatcher.group(1).trim();
seconds = parseTimeString(timeFormatted);
}
Matcher weightMatcher = FILAMENT_G_PATTERN.matcher(line);
if (weightMatcher.find()) {
try {
weightG = Double.parseDouble(weightMatcher.group(1).trim());
} catch (NumberFormatException ignored) {}
}
Matcher lengthMatcher = FILAMENT_MM_PATTERN.matcher(line);
if (lengthMatcher.find()) {
try {
lengthMm = Double.parseDouble(lengthMatcher.group(1).trim());
} catch (NumberFormatException ignored) {}
}
count++;
}
}
return new PrintStats(seconds, timeFormatted, weightG, lengthMm);
}
private long parseTimeString(String timeStr) {
// Formats: "1d 2h 3m 4s" or "1h 20m 10s"
long totalSeconds = 0;
Matcher d = Pattern.compile("(\\d+)d").matcher(timeStr);
if (d.find()) totalSeconds += Long.parseLong(d.group(1)) * 86400;
Matcher h = Pattern.compile("(\\d+)h").matcher(timeStr);
if (h.find()) totalSeconds += Long.parseLong(h.group(1)) * 3600;
Matcher m = Pattern.compile("(\\d+)m").matcher(timeStr);
if (m.find()) totalSeconds += Long.parseLong(m.group(1)) * 60;
Matcher s = Pattern.compile("(\\d+)s").matcher(timeStr);
if (s.find()) totalSeconds += Long.parseLong(s.group(1));
return totalSeconds;
}
}

100
backend/src/main/java/com/printcalculator/service/ProfileManager.java Normal file
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package com.printcalculator.service;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Iterator;
import java.util.Optional;
import java.util.logging.Logger;
import java.util.stream.Stream;
@Service
public class ProfileManager {
private static final Logger logger = Logger.getLogger(ProfileManager.class.getName());
private final String profilesRoot;
private final ObjectMapper mapper;
public ProfileManager(@Value("${profiles.root:profiles}") String profilesRoot, ObjectMapper mapper) {
this.profilesRoot = profilesRoot;
this.mapper = mapper;
}
public ObjectNode getMergedProfile(String profileName, String type) throws IOException {
Path profilePath = findProfileFile(profileName, type);
if (profilePath == null) {
throw new IOException("Profile not found: " + profileName);
}
return resolveInheritance(profilePath);
}
private Path findProfileFile(String name, String type) {
// Simple search: look for name.json in the profiles_root recursively
// Type could be "machine", "process", "filament" to narrow down, but for now global search
String filename = name.endsWith(".json") ? name : name + ".json";
try (Stream<Path> stream = Files.walk(Paths.get(profilesRoot))) {
Optional<Path> found = stream
.filter(p -> p.getFileName().toString().equals(filename))
.findFirst();
return found.orElse(null);
} catch (IOException e) {
logger.severe("Error searching for profile: " + e.getMessage());
return null;
}
}
private ObjectNode resolveInheritance(Path currentPath) throws IOException {
// 1. Load current
JsonNode currentNode = mapper.readTree(currentPath.toFile());
// 2. Check inherits
if (currentNode.has("inherits")) {
String parentName = currentNode.get("inherits").asText();
// Try to find parent in same directory or standard search
Path parentPath = currentPath.getParent().resolve(parentName);
if (!Files.exists(parentPath)) {
// If not in same dir, search globally
parentPath = findProfileFile(parentName, "any");
}
if (parentPath != null && Files.exists(parentPath)) {
// Recursive call
ObjectNode parentNode = resolveInheritance(parentPath);
// Merge current into parent (child overrides parent)
merge(parentNode, (ObjectNode) currentNode);
// Remove "inherits" field
parentNode.remove("inherits");
return parentNode;
} else {
logger.warning("Inherited profile not found: " + parentName + " for " + currentPath);
}
}
if (currentNode instanceof ObjectNode) {
return (ObjectNode) currentNode;
} else {
// Should verify it is an object
return (ObjectNode) currentNode;
}
}
// Shallow merge suitable for OrcaSlicer profiles
private void merge(ObjectNode mainNode, ObjectNode updateNode) {
Iterator<String> fieldNames = updateNode.fieldNames();
while (fieldNames.hasNext()) {
String fieldName = fieldNames.next();
JsonNode jsonNode = updateNode.get(fieldName);
// Replace standard fields
mainNode.set(fieldName, jsonNode);
}
}
}

59
backend/src/main/java/com/printcalculator/service/QuoteCalculator.java Normal file
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package com.printcalculator.service;
import com.printcalculator.config.AppProperties;
import com.printcalculator.model.CostBreakdown;
import com.printcalculator.model.PrintStats;
import com.printcalculator.model.QuoteResult;
import org.springframework.stereotype.Service;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;
import java.util.List;
@Service
public class QuoteCalculator {
private final AppProperties props;
public QuoteCalculator(AppProperties props) {
this.props = props;
}
public QuoteResult calculate(PrintStats stats) {
// Material Cost: (weight / 1000) * costPerKg
BigDecimal weightKg = BigDecimal.valueOf(stats.filamentWeightGrams()).divide(BigDecimal.valueOf(1000), 4, RoundingMode.HALF_UP);
BigDecimal materialCost = weightKg.multiply(BigDecimal.valueOf(props.getFilamentCostPerKg()));
// Machine Cost: (seconds / 3600) * costPerHour
BigDecimal hours = BigDecimal.valueOf(stats.printTimeSeconds()).divide(BigDecimal.valueOf(3600), 4, RoundingMode.HALF_UP);
BigDecimal machineCost = hours.multiply(BigDecimal.valueOf(props.getMachineCostPerHour()));
// Energy Cost: (watts / 1000) * hours * costPerKwh
BigDecimal kw = BigDecimal.valueOf(props.getPrinterPowerWatts()).divide(BigDecimal.valueOf(1000), 4, RoundingMode.HALF_UP);
BigDecimal kwh = kw.multiply(hours);
BigDecimal energyCost = kwh.multiply(BigDecimal.valueOf(props.getEnergyCostPerKwh()));
// Subtotal
BigDecimal subtotal = materialCost.add(machineCost).add(energyCost);
// Markup
BigDecimal markupFactor = BigDecimal.valueOf(1.0 + (props.getMarkupPercent() / 100.0));
BigDecimal totalPrice = subtotal.multiply(markupFactor).setScale(2, RoundingMode.HALF_UP);
BigDecimal markupAmount = totalPrice.subtract(subtotal);
CostBreakdown breakdown = new CostBreakdown(
materialCost.setScale(2, RoundingMode.HALF_UP),
machineCost.setScale(2, RoundingMode.HALF_UP),
energyCost.setScale(2, RoundingMode.HALF_UP),
subtotal.setScale(2, RoundingMode.HALF_UP),
markupAmount.setScale(2, RoundingMode.HALF_UP)
);
List<String> notes = new ArrayList<>();
notes.add("Generated via Dynamic Slicer (Java Backend)");
return new QuoteResult(totalPrice, "EUR", stats, breakdown, notes);
}
}

132
backend/src/main/java/com/printcalculator/service/SlicerService.java Normal file
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@@ -0,0 +1,132 @@
package com.printcalculator.service;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.printcalculator.model.PrintStats;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;
@Service
public class SlicerService {
private static final Logger logger = Logger.getLogger(SlicerService.class.getName());
private final String slicerPath;
private final ProfileManager profileManager;
private final GCodeParser gCodeParser;
private final ObjectMapper mapper;
public SlicerService(
@Value("${slicer.path}") String slicerPath,
ProfileManager profileManager,
GCodeParser gCodeParser,
ObjectMapper mapper) {
this.slicerPath = slicerPath;
this.profileManager = profileManager;
this.gCodeParser = gCodeParser;
this.mapper = mapper;
}
public PrintStats slice(File inputStl, String machineName, String filamentName, String processName) throws IOException {
// 1. Prepare Profiles
ObjectNode machineProfile = profileManager.getMergedProfile(machineName, "machine");
ObjectNode filamentProfile = profileManager.getMergedProfile(filamentName, "filament");
ObjectNode processProfile = profileManager.getMergedProfile(processName, "process");
// 2. Create Temp Dir
Path tempDir = Files.createTempDirectory("slicer_job_");
try {
File mFile = tempDir.resolve("machine.json").toFile();
File fFile = tempDir.resolve("filament.json").toFile();
File pFile = tempDir.resolve("process.json").toFile();
mapper.writeValue(mFile, machineProfile);
mapper.writeValue(fFile, filamentProfile);
mapper.writeValue(pFile, processProfile);
// 3. Build Command
// --load-settings "machine.json;process.json" --load-filaments "filament.json"
String settingsArg = mFile.getAbsolutePath() + ";" + pFile.getAbsolutePath();
List<String> command = new ArrayList<>();
command.add(slicerPath);
command.add("--load-settings");
command.add(settingsArg);
command.add("--load-filaments");
command.add(fFile.getAbsolutePath());
command.add("--ensure-on-bed");
command.add("--arrange");
command.add("1"); // force arrange
command.add("--slice");
command.add("0"); // slice plate 0
command.add("--outputdir");
command.add(tempDir.toAbsolutePath().toString());
// Need to handle Mac structure for console if needed?
// Usually the binary at Contents/MacOS/OrcaSlicer works fine as console app.
command.add(inputStl.getAbsolutePath());
logger.info("Executing Slicer: " + String.join(" ", command));
// 4. Run Process
ProcessBuilder pb = new ProcessBuilder(command);
pb.directory(tempDir.toFile());
// pb.inheritIO(); // Useful for debugging, but maybe capture instead?
Process process = pb.start();
boolean finished = process.waitFor(5, TimeUnit.MINUTES);
if (!finished) {
process.destroy();
throw new IOException("Slicer timed out");
}
if (process.exitValue() != 0) {
// Read stderr
String error = new String(process.getErrorStream().readAllBytes());
throw new IOException("Slicer failed with exit code " + process.exitValue() + ": " + error);
}
// 5. Find Output GCode
// Usually [basename].gcode or plate_1.gcode
String basename = inputStl.getName();
if (basename.toLowerCase().endsWith(".stl")) {
basename = basename.substring(0, basename.length() - 4);
}
File gcodeFile = tempDir.resolve(basename + ".gcode").toFile();
if (!gcodeFile.exists()) {
// Try plate_1.gcode fallback
File alt = tempDir.resolve("plate_1.gcode").toFile();
if (alt.exists()) {
gcodeFile = alt;
} else {
throw new IOException("GCode output not found in " + tempDir);
}
}
// 6. Parse Results
return gCodeParser.parse(gcodeFile);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new IOException("Interrupted during slicing", e);
} finally {
// Cleanup temp dir
// In production we should delete, for debugging we might want to keep?
// Let's delete for now on success.
// recursiveDelete(tempDir);
// Leaving it effectively "leaks" temp, but safer for persistent debugging?
// Implementation detail: Use a utility to clean up.
}
}
}

15
backend/src/main/resources/application.properties Normal file
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@@ -0,0 +1,15 @@
spring.application.name=backend
server.port=8080
# Slicer Configuration
# Map SLICER_PATH env var if present (default to /opt/orcaslicer/AppRun or Mac path)
slicer.path=${SLICER_PATH:/Applications/OrcaSlicer.app/Contents/MacOS/OrcaSlicer}
profiles.root=${PROFILES_DIR:profiles}
# Pricing Configuration
# Mapped to legacy environment variables for Docker compatibility
pricing.filament-cost-per-kg=${FILAMENT_COST_PER_KG:25.0}
pricing.machine-cost-per-hour=${MACHINE_COST_PER_HOUR:2.0}
pricing.energy-cost-per-kwh=${ENERGY_COST_PER_KWH:0.30}
pricing.printer-power-watts=${PRINTER_POWER_WATTS:150.0}
pricing.markup-percent=${MARKUP_PERCENT:20.0}

57
backend/src/test/java/com/printcalculator/service/GCodeParserTest.java Normal file
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@@ -0,0 +1,57 @@
package com.printcalculator.service;
import com.printcalculator.model.PrintStats;
import org.junit.jupiter.api.Test;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import static org.junit.jupiter.api.Assertions.*;
class GCodeParserTest {
@Test
void parse_validGcode_returnsCorrectStats() throws IOException {
// Arrange
File tempFile = File.createTempFile("test", ".gcode");
try (FileWriter writer = new FileWriter(tempFile)) {
writer.write("; generated by OrcaSlicer\n");
writer.write("; estimated printing time = 1h 2m 3s\n");
writer.write("; filament used [g] = 10.5\n");
writer.write("; filament used [mm] = 3000.0\n");
}
GCodeParser parser = new GCodeParser();
// Act
PrintStats stats = parser.parse(tempFile);
// Assert
assertEquals(3723, stats.printTimeSeconds()); // 3600 + 120 + 3
assertEquals("1h 2m 3s", stats.printTimeFormatted());
assertEquals(10.5, stats.filamentWeightGrams(), 0.001);
assertEquals(3000.0, stats.filamentLengthMm(), 0.001);
tempFile.delete();
}
@Test
void parse_footerGcode_returnsCorrectStats() throws IOException {
// Arrange
File tempFile = File.createTempFile("test_footer", ".gcode");
try (FileWriter writer = new FileWriter(tempFile)) {
writer.write("; header\n");
// ... many lines ...
writer.write("; filament used [g] = 5.0\n");
writer.write("; estimated printing time = 12m 30s\n");
}
GCodeParser parser = new GCodeParser();
PrintStats stats = parser.parse(tempFile);
assertEquals(750, stats.printTimeSeconds()); // 12*60 + 30
assertEquals(5.0, stats.filamentWeightGrams(), 0.001);
tempFile.delete();
}
}

15
backend/target/classes/application.properties Normal file
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@@ -0,0 +1,15 @@
spring.application.name=backend
server.port=8080
# Slicer Configuration
# Map SLICER_PATH env var if present (default to /opt/orcaslicer/AppRun or Mac path)
slicer.path=${SLICER_PATH:/Applications/OrcaSlicer.app/Contents/MacOS/OrcaSlicer}
profiles.root=${PROFILES_DIR:profiles}
# Pricing Configuration
# Mapped to legacy environment variables for Docker compatibility
pricing.filament-cost-per-kg=${FILAMENT_COST_PER_KG:25.0}
pricing.machine-cost-per-hour=${MACHINE_COST_PER_HOUR:2.0}
pricing.energy-cost-per-kwh=${ENERGY_COST_PER_KWH:0.30}
pricing.printer-power-watts=${PRINTER_POWER_WATTS:150.0}
pricing.markup-percent=${MARKUP_PERCENT:20.0}

11
backend/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst Normal file
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@@ -0,0 +1,11 @@
com/printcalculator/controller/QuoteController.class
com/printcalculator/service/GCodeParser.class
com/printcalculator/service/QuoteCalculator.class
com/printcalculator/config/SlicerConfig.class
com/printcalculator/BackendApplication.class
com/printcalculator/model/PrintStats.class
com/printcalculator/model/CostBreakdown.class
com/printcalculator/service/ProfileManager.class
com/printcalculator/service/SlicerService.class
com/printcalculator/model/QuoteResult.class
com/printcalculator/config/AppProperties.class

11
backend/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst Normal file
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@@ -0,0 +1,11 @@
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/BackendApplication.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/config/AppProperties.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/config/SlicerConfig.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/controller/QuoteController.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/model/CostBreakdown.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/model/PrintStats.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/model/QuoteResult.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/service/GCodeParser.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/service/ProfileManager.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/service/QuoteCalculator.java
/Users/joe/IdeaProjects/print-calculator/backend/src/main/java/com/printcalculator/service/SlicerService.java

0
backend/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst Normal file
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1
backend/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/inputFiles.lst Normal file
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@@ -0,0 +1 @@
/Users/joe/IdeaProjects/print-calculator/backend/src/test/java/com/printcalculator/service/GCodeParserTest.java

63
backend/target/surefire-reports/TEST-com.printcalculator.service.GCodeParserTest.xml Normal file
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File diff suppressed because one or more lines are too long

4
backend/target/surefire-reports/com.printcalculator.service.GCodeParserTest.txt Normal file
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@@ -0,0 +1,4 @@
-------------------------------------------------------------------------------
Test set: com.printcalculator.service.GCodeParserTest
-------------------------------------------------------------------------------
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.029 s -- in com.printcalculator.service.GCodeParserTest

86
backend/test_cube.stl
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@@ -1,86 +0,0 @@
solid cube
facet normal 0 0 -1
outer loop
vertex 0 0 0
vertex 10 0 0
vertex 10 10 0
endloop
endfacet
facet normal 0 0 -1
outer loop
vertex 0 0 0
vertex 10 10 0
vertex 0 10 0
endloop
endfacet
facet normal 0 0 1
outer loop
vertex 0 0 10
vertex 0 10 10
vertex 10 10 10
endloop
endfacet
facet normal 0 0 1
outer loop
vertex 0 0 10
vertex 10 10 10
vertex 10 0 10
endloop
endfacet
facet normal 0 -1 0
outer loop
vertex 0 0 0
vertex 0 0 10
vertex 10 0 10
endloop
endfacet
facet normal 0 -1 0
outer loop
vertex 0 0 0
vertex 10 0 10
vertex 10 0 0
endloop
endfacet
facet normal 1 0 0
outer loop
vertex 10 0 0
vertex 10 0 10
vertex 10 10 10
endloop
endfacet
facet normal 1 0 0
outer loop
vertex 10 0 0
vertex 10 10 10
vertex 10 10 0
endloop
endfacet
facet normal 0 1 0
outer loop
vertex 10 10 0
vertex 10 10 10
vertex 0 10 10
endloop
endfacet
facet normal 0 1 0
outer loop
vertex 10 10 0
vertex 0 10 10
vertex 0 10 0
endloop
endfacet
facet normal -1 0 0
outer loop
vertex 0 10 0
vertex 0 10 10
vertex 0 0 10
endloop
endfacet
facet normal -1 0 0
outer loop
vertex 0 10 0
vertex 0 0 10
vertex 0 0 0
endloop
endfacet
endsolid cube

58
backend/tests/test_profile_logic.py
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@@ -1,58 +0,0 @@
import sys
import os
import unittest
import json
# Add backend to path
sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
from profile_manager import ProfileManager
from profile_cache import get_cache_key
class TestProfileManager(unittest.TestCase):
def setUp(self):
self.pm = ProfileManager(profiles_root="profiles")
def test_list_machines(self):
machines = self.pm.list_machines()
print(f"Found machines: {len(machines)}")
self.assertTrue(len(machines) > 0, "No machines found")
# Check for a known machine
self.assertTrue(any("Bambu Lab A1" in m for m in machines), "Bambu Lab A1 should be in the list")
def test_find_profile(self):
# We know "Bambu Lab A1 0.4 nozzle" should exist (based on user context and mappings)
# It might be in profiles/BBL/machine/
path = self.pm._find_profile_file("Bambu Lab A1 0.4 nozzle", "machine")
self.assertIsNotNone(path, "Could not find Bambu Lab A1 machine profile")
print(f"Found profile at: {path}")
def test_scan_profiles_inheritance(self):
# Pick a profile we expect to inherit stuff
# e.g. "Bambu Lab A1 0.4 nozzle" inherits "fdm_bbl_3dp_001_common" which inherits "fdm_machine_common"
merged, _, _ = self.pm.get_profiles(
"Bambu Lab A1 0.4 nozzle",
"Bambu PLA Basic @BBL A1",
"0.20mm Standard @BBL A1"
)
self.assertIsNotNone(merged)
# Check if inherits is gone
self.assertNotIn("inherits", merged)
# Check if patch applied (G92 E0)
self.assertIn("G92 E0", merged.get("layer_change_gcode", ""))
# Check specific key from base
# "printer_technology": "FFF" is usually in common
# We can't be 100% sure of keys without seeing file, but let's check something likely
self.assertTrue("nozzle_diameter" in merged or "extruder_clearance_height_to_lid" in merged or "printable_height" in merged)
def test_mappings_resolution(self):
# Test if the slicer service would resolve correctly?
# We can just test the manager with mapped names if the manager supported it,
# but the manager deals with explicit names.
# Integration test handles the mapping.
pass
if __name__ == '__main__':
unittest.main()

71
frontend/src/app/features/calculator/components/upload-form/upload-form.component.ts
View File

@@ -67,6 +67,33 @@ import { QuoteRequest } from '../../services/quote-estimator.service';
></app-input>
@if (mode() === 'advanced') {
<div class="grid">
<app-select
formControlName="color"
[label]="'CALC.COLOR' | translate"
[options]="colors"
></app-select>
<app-select
formControlName="infillPattern"
[label]="'CALC.PATTERN' | translate"
[options]="infillPatterns"
></app-select>
</div>
<div class="grid">
<app-input
formControlName="infillDensity"
type="number"
[label]="'CALC.INFILL' | translate"
></app-input>
<div class="checkbox-row">
<input type="checkbox" formControlName="supportEnabled" id="support">
<label for="support">{{ 'CALC.SUPPORT' | translate }}</label>
</div>
</div>
<app-input
formControlName="notes"
[label]="'CALC.NOTES' | translate"
@@ -127,6 +154,24 @@ import { QuoteRequest } from '../../services/quote-estimator.service';
font-weight: 600;
}
}
.checkbox-row {
display: flex;
align-items: center;
gap: var(--space-3);
height: 100%;
padding-top: var(--space-4);
input[type="checkbox"] {
width: 20px;
height: 20px;
accent-color: var(--color-brand);
}
label {
font-weight: 500;
cursor: pointer;
}
}
`]
})
export class UploadFormComponent {
@@ -146,10 +191,27 @@ export class UploadFormComponent {
];
qualities = [
{ label: 'Bozza (Veloce)', value: 'Draft' },
{ label: 'Bozza (Fast)', value: 'Draft' },
{ label: 'Standard', value: 'Standard' },
{ label: 'Alta definizione', value: 'High' }
];
colors = [
{ label: 'Black', value: 'Black' },
{ label: 'White', value: 'White' },
{ label: 'Gray', value: 'Gray' },
{ label: 'Red', value: 'Red' },
{ label: 'Blue', value: 'Blue' },
{ label: 'Green', value: 'Green' },
{ label: 'Yellow', value: 'Yellow' }
];
infillPatterns = [
{ label: 'Grid', value: 'grid' },
{ label: 'Gyroid', value: 'gyroid' },
{ label: 'Cubic', value: 'cubic' },
{ label: 'Triangles', value: 'triangles' }
];
acceptedFormats = '.stl,.3mf,.step,.stp,.obj,.amf,.ply,.igs,.iges';
constructor(private fb: FormBuilder) {
@@ -158,7 +220,12 @@ export class UploadFormComponent {
material: ['PLA', Validators.required],
quality: ['Standard', Validators.required],
quantity: [1, [Validators.required, Validators.min(1)]],
notes: ['']
notes: [''],
// Advanced fields
color: ['Black'],
infillDensity: [20, [Validators.min(0), Validators.max(100)]],
infillPattern: ['grid'],
supportEnabled: [false]
});
}

11
frontend/src/app/features/calculator/services/quote-estimator.service.ts
View File

@@ -10,6 +10,10 @@ export interface QuoteRequest {
quality: string;
quantity: number;
notes?: string;
color?: string;
infillDensity?: number;
infillPattern?: string;
supportEnabled?: boolean;
mode: 'easy' | 'advanced';
}
@@ -47,6 +51,13 @@ export class QuoteEstimatorService {
formData.append('filament', this.mapMaterial(request.material));
formData.append('quality', this.mapQuality(request.quality));
if (request.mode === 'advanced') {
if (request.color) formData.append('material_color', request.color);
if (request.infillDensity) formData.append('infill_density', request.infillDensity.toString());
if (request.infillPattern) formData.append('infill_pattern', request.infillPattern);
if (request.supportEnabled) formData.append('support_enabled', 'true');
}
const headers: any = {};
// @ts-ignore
if (environment.basicAuth) {

5
frontend/src/assets/i18n/it.json
View File

@@ -23,6 +23,11 @@
"QUALITY": "Qualità",
"QUANTITY": "Quantità",
"NOTES": "Note aggiuntive",
"COLOR": "Colore",
"INFILL": "Riempimento (%)",
"PATTERN": "Pattern di riempimento",
"SUPPORT": "Supporti",
"SUPPORT_DESC": "Abilita supporti per sporgenze",
"CALCULATE": "Calcola Preventivo",
"RESULT": "Preventivo Stimato",
"TIME": "Tempo Stampa",