Initial commit - copied workspace after database cleanup

server/routes/holidays.py

@@ -0,0 +1,159 @@
+from flask import Blueprint, request, jsonify
+from server.database import Session
+from models.models import SchoolHoliday
+from datetime import datetime
+import csv
+import io
+
+holidays_bp = Blueprint("holidays", __name__, url_prefix="/api/holidays")
+
+
+@holidays_bp.route("", methods=["GET"])
+def list_holidays():
+    session = Session()
+    region = request.args.get("region")
+    q = session.query(SchoolHoliday)
+    if region:
+        q = q.filter(SchoolHoliday.region == region)
+    rows = q.order_by(SchoolHoliday.start_date.asc()).all()
+    data = [r.to_dict() for r in rows]
+    session.close()
+    return jsonify({"holidays": data})
+
+
+@holidays_bp.route("/upload", methods=["POST"])
+def upload_holidays():
+    """
+    Accepts a CSV/TXT file upload (multipart/form-data).
+
+    Supported formats:
+    1) Headered CSV with columns (case-insensitive): name, start_date, end_date[, region]
+       - Dates: YYYY-MM-DD, DD.MM.YYYY, YYYY/MM/DD, or YYYYMMDD
+    2) Headerless CSV/TXT lines with columns:
+       [internal, name, start_yyyymmdd, end_yyyymmdd, optional_internal]
+       - Only columns 2-4 are used; 1 and 5 are ignored.
+    """
+    if "file" not in request.files:
+        return jsonify({"error": "No file part"}), 400
+    file = request.files["file"]
+    if file.filename == "":
+        return jsonify({"error": "No selected file"}), 400
+
+    try:
+        raw = file.read()
+        # Try UTF-8 first (strict), then cp1252, then latin-1 as last resort
+        try:
+            content = raw.decode("utf-8")
+        except UnicodeDecodeError:
+            try:
+                content = raw.decode("cp1252")
+            except UnicodeDecodeError:
+                content = raw.decode("latin-1", errors="replace")
+
+        sniffer = csv.Sniffer()
+        dialect = None
+        try:
+            sample = content[:2048]
+            # Some files may contain a lot of quotes; allow Sniffer to guess delimiter
+            dialect = sniffer.sniff(sample)
+        except Exception:
+            pass
+
+        def parse_date(s: str):
+            s = (s or "").strip()
+            if not s:
+                return None
+            # Numeric YYYYMMDD
+            if s.isdigit() and len(s) == 8:
+                try:
+                    return datetime.strptime(s, "%Y%m%d").date()
+                except ValueError:
+                    pass
+            # Common formats
+            for fmt in ("%Y-%m-%d", "%d.%m.%Y", "%Y/%m/%d"):
+                try:
+                    return datetime.strptime(s, fmt).date()
+                except ValueError:
+                    continue
+            raise ValueError(f"Unsupported date format: {s}")
+
+        session = Session()
+        inserted = 0
+        updated = 0
+
+        # First, try headered CSV via DictReader
+        dict_reader = csv.DictReader(io.StringIO(
+            content), dialect=dialect) if dialect else csv.DictReader(io.StringIO(content))
+        fieldnames_lower = [h.lower() for h in (dict_reader.fieldnames or [])]
+        has_required_headers = {"name", "start_date",
+                                "end_date"}.issubset(set(fieldnames_lower))
+
+        def upsert(name: str, start_date, end_date, region=None):
+            nonlocal inserted, updated
+            if not name or not start_date or not end_date:
+                return
+            existing = (
+                session.query(SchoolHoliday)
+                .filter(
+                    SchoolHoliday.name == name,
+                    SchoolHoliday.start_date == start_date,
+                    SchoolHoliday.end_date == end_date,
+                    SchoolHoliday.region.is_(
+                        region) if region is None else SchoolHoliday.region == region,
+                )
+                .first()
+            )
+            if existing:
+                existing.region = region
+                existing.source_file_name = file.filename
+                updated += 1
+            else:
+                session.add(SchoolHoliday(
+                    name=name,
+                    start_date=start_date,
+                    end_date=end_date,
+                    region=region,
+                    source_file_name=file.filename,
+                ))
+                inserted += 1
+
+        if has_required_headers:
+            for row in dict_reader:
+                norm = {k.lower(): (v or "").strip() for k, v in row.items()}
+                name = norm.get("name")
+                try:
+                    start_date = parse_date(norm.get("start_date"))
+                    end_date = parse_date(norm.get("end_date"))
+                except ValueError:
+                    # Skip rows with unparseable dates
+                    continue
+                region = (norm.get("region")
+                          or None) if "region" in norm else None
+                upsert(name, start_date, end_date, region)
+        else:
+            # Fallback: headerless rows -> use columns [1]=name, [2]=start, [3]=end
+            reader = csv.reader(io.StringIO(
+                content), dialect=dialect) if dialect else csv.reader(io.StringIO(content))
+            for row in reader:
+                if not row:
+                    continue
+                # tolerate varying column counts (4 or 5); ignore first and optional last
+                cols = [c.strip() for c in row]
+                if len(cols) < 4:
+                    # Not enough data
+                    continue
+                name = cols[1].strip().strip('"')
+                start_raw = cols[2]
+                end_raw = cols[3]
+                try:
+                    start_date = parse_date(start_raw)
+                    end_date = parse_date(end_raw)
+                except ValueError:
+                    continue
+                upsert(name, start_date, end_date, None)
+
+        session.commit()
+        session.close()
+        return jsonify({"success": True, "inserted": inserted, "updated": updated})
+    except Exception as e:
+        return jsonify({"error": str(e)}), 400