Paragraph-level links, preview tooltips

src/formex_viewer/server.py

@@ -2,7 +2,11 @@ import lxml.etree as ET
 from fastapi import APIRouter, FastAPI, Response
 from fastapi.middleware.cors import CORSMiddleware
 
-from formex_viewer.formex4 import FormexArticleConverter
+from formex_viewer.formex4 import (
+    FormexArticleConverter,
+    extract_article,
+    extract_paragraph,
+)
 from formex_viewer.main import (
     CellarClient,
     CellarIdentifier,
@@ -121,21 +125,46 @@ def toc(celex_id: str, language: Language = Language.ENG):
 
 
 @api_router.get("/{celex_id}/articles/{article_id}/{language}")
-def article(celex_id: str, article_id: int, language: Language = Language.ENG):
+def article(
+    celex_id: str,
+    article_id: int,
+    language: Language = Language.ENG,
+):
     """
     Fetch an article from the server.
     """
     xml = _get_fmx4_data(celex_id, language)
+    article = extract_article(xml, article_id=article_id)
 
-    article_xpath = "//ARTICLE"
-    articles = xml.xpath(article_xpath)
-    for article in articles:
-        num = article.get("IDENTIFIER").lstrip("0")
-        if num == str(article_id):
-            return Response(
-                FormexArticleConverter(language=language).convert_article(article),
-                media_type="text/html",
-            )
+    if article is None:
+        return Response(
+            "Article not found",
+            status_code=404,
+        )
+
+    return Response(
+        FormexArticleConverter(language=language).convert_article(article),
+        media_type="text/html",
+    )
+
+
+@api_router.get("/{celex_id}/articles/{article_id}/{parag_id}/{language}")
+def paragraph(
+    celex_id: str,
+    article_id: int,
+    parag_id: int,
+    language: Language = Language.ENG,
+):
+    """
+    Fetch a paragraph within an article from the server.
+    """
+    xml = _get_fmx4_data(celex_id, language)
+    parag = extract_paragraph(xml, article_id=article_id, paragraph_id=parag_id)
+
+    return Response(
+        FormexArticleConverter(language=language).convert_article(parag),
+        media_type="text/html",
+    )
 
 
 app.include_router(api_router, prefix="/api")