added chart

app/api/routes/charts.py

@@ -0,0 +1,49 @@
+from fastapi import APIRouter, Depends, Query
+from sqlalchemy.orm import Session
+from datetime import date, timedelta
+from typing import List
+from app.database import get_db, TrackedDay, TrackedMeal, calculate_day_nutrition_tracked
+
+router = APIRouter(tags=["charts"])
+
+@router.get("/charts", response_class=HTMLResponse)
+async def charts_page(request: Request, person: str = "Sarah", db: Session = Depends(get_db)):
+    """Render the charts page"""
+    from main import templates
+    return templates.TemplateResponse("charts.html", {
+        "request": request,
+        "person": person
+    })
+
+@router.get("/api/charts", response_model=List[dict])
+async def get_charts_data(
+    person: str = Query(..., description="Person name (e.g., Sarah)"),
+    days: int = Query(7, description="Number of past days to fetch data for", ge=1, le=30),
+    db: Session = Depends(get_db)
+):
+    """
+    Get daily calorie data for the last N days for a person.
+    Returns list of {"date": "YYYY-MM-DD", "calories": float} sorted by date descending.
+    """
+    
+    end_date = date.today()
+    start_date = end_date - timedelta(days=days - 1)
+    
+    tracked_days = db.query(TrackedDay).filter(
+        TrackedDay.person == person,
+        TrackedDay.date >= start_date,
+        TrackedDay.date <= end_date
+    ).order_by(TrackedDay.date.desc()).all()
+    
+    chart_data = []
+    for tracked_day in tracked_days:
+        tracked_meals = db.query(TrackedMeal).filter(
+            TrackedMeal.tracked_day_id == tracked_day.id
+        ).all()
+        day_totals = calculate_day_nutrition_tracked(tracked_meals, db)
+        chart_data.append({
+            "date": tracked_day.date.isoformat(),
+            "calories": round(day_totals.get("calories", 0), 2)
+        })
+    
+    return chart_data