initial commit

app/services/newsletter.py

@@ -0,0 +1,76 @@
+from datetime import datetime
+from html import escape
+from typing import Any
+
+
+def filter_articles(
+    articles: list[dict[str, Any]],
+    category_filter: str | None = None,
+) -> list[dict[str, Any]]:
+    if not category_filter:
+        return articles
+    wanted = category_filter.strip().lower()
+    return [
+        a
+        for a in articles
+        if any(c.lower() == wanted for c in a.get("categories", []))
+    ]
+
+
+def create_plain_text(articles: list[dict[str, Any]], title: str) -> str:
+    lines = [title, "=" * len(title), ""]
+    if not articles:
+        lines.append("Keine Artikel im gewählten Zeitraum gefunden.")
+        return "\n".join(lines)
+
+    for idx, item in enumerate(articles, start=1):
+        stamp = _format_ts(item.get("timestamp"))
+        cat = ", ".join(item.get("categories", [])) or "Keine Kategorie"
+        comment = item.get("comment") or "-"
+        lines.extend(
+            [
+                f"{idx}. {item.get('title', 'Ohne Titel')}",
+                f"   Zeit: {stamp}",
+                f"   Benutzer: {item.get('user', '-')}",
+                f"   Kategorien: {cat}",
+                f"   Kommentar: {comment}",
+                "",
+            ]
+        )
+    return "\n".join(lines).strip()
+
+
+def create_html(articles: list[dict[str, Any]], title: str) -> str:
+    if not articles:
+        return f"<h2>{escape(title)}</h2><p>Keine Artikel im gewählten Zeitraum gefunden.</p>"
+
+    blocks = [f"<h2>{escape(title)}</h2>", "<ul>"]
+    for item in articles:
+        article_title = escape(item.get("title", "Ohne Titel"))
+        stamp = escape(_format_ts(item.get("timestamp")))
+        user = escape(item.get("user", "-"))
+        cat = escape(", ".join(item.get("categories", [])) or "Keine Kategorie")
+        comment = escape(item.get("comment") or "-")
+        blocks.append(
+            (
+                "<li>"
+                f"<strong>{article_title}</strong><br>"
+                f"Zeit: {stamp}<br>"
+                f"Benutzer: {user}<br>"
+                f"Kategorien: {cat}<br>"
+                f"Kommentar: {comment}"
+                "</li>"
+            )
+        )
+    blocks.append("</ul>")
+    return "\n".join(blocks)
+
+
+def _format_ts(value: str | None) -> str:
+    if not value:
+        return "-"
+    try:
+        dt = datetime.strptime(value, "%Y-%m-%dT%H:%M:%SZ")
+        return dt.strftime("%d.%m.%Y %H:%M UTC")
+    except ValueError:
+        return value