feat: account sessions and usable template editors

pigway_frame_flow/renderers/templates.py

@@ -1,3 +1,4 @@
+import calendar
 import json
 from datetime import datetime
 from io import BytesIO
@@ -99,6 +100,38 @@ class TemplateRenderer:
             x, y, w, h = block["box"]
             if block["kind"] == "rule":
                 draw.rectangle((x, y, x + w, y + h), fill=accent)
+            elif block["kind"] == "month":
+                try:
+                    shown = datetime.strptime(str(values["date"]), "%Y-%m-%d")
+                except ValueError:
+                    raise FlowError(
+                        E.INVALID_REQUEST, "Calendar date must be YYYY-MM-DD"
+                    ) from None
+                text(shown.strftime("%Y-%m"), x, y, w, 70, 48)
+                cells = calendar.Calendar(firstweekday=0).monthdayscalendar(
+                    shown.year, shown.month
+                )
+                cell_w, cell_h = w // 7, (h - 140) // len(cells)
+                for col, label in enumerate(
+                    ["一 M", "二 T", "三 W", "四 T", "五 F", "六 S", "日 S"]
+                ):
+                    text(label, x + col * cell_w + 10, y + 80, cell_w - 20, 60, 30)
+                for row, week in enumerate(cells):
+                    for col, day in enumerate(week):
+                        if not day:
+                            continue
+                        left, top = x + col * cell_w, y + 140 + row * cell_h
+                        if (shown.year, shown.month, day) == (
+                            current.year,
+                            current.month,
+                            current.day,
+                        ):
+                            draw.rectangle(
+                                (left, top, left + cell_w - 6, top + cell_h - 6),
+                                outline=accent,
+                                width=5,
+                            )
+                        text(day, left + 25, top + 10, cell_w - 35, cell_h, 38)
             elif block["kind"] == "photo":
                 asset_id = values.get("photo_id")
                 if asset_id: