implement individual approved chapter text download feature

BACKEND/app/crud.py

@@ -2084,7 +2084,7 @@ def fetch_book_metadata(book: str, book_metadata: dict) -> dict:
         "long_title": book_metadata[book]["long"]["en"],
     }
 
-def generate_usfm_content(book, book_info, chapter_map, versification_data, db):
+def generate_usfm_content(book, book_info, chapter_map, versification_data, db, single_chapter: int = None):
     """
     Generate USFM formatted content with book metadata and verses.
     """
@@ -2099,6 +2099,28 @@ def generate_usfm_content(book, book_info, chapter_map, versification_data, db):
         raise HTTPException(
             status_code=404, detail=f"Versification data not found for book '{book}'."
         )
+
+    # --- If single_chapter specified, process only that one ---
+    if single_chapter:
+        if single_chapter not in chapter_map:
+            raise HTTPException(
+                status_code=404,
+                detail=f"Chapter {single_chapter} not found in book '{book}'.",
+            )
+
+        num_verses = int(max_verses[single_chapter - 1])
+        usfm_text += f"\\c {single_chapter}\n\\p\n"
+
+        chapter = chapter_map[single_chapter]
+        verses = db.query(Verse).filter(Verse.chapter_id == chapter.chapter_id).all()
+        verse_map = {verse.verse: verse.text for verse in verses}
+
+        for verse_number in range(1, num_verses + 1):
+            usfm_text += f"\\v {verse_number} {verse_map.get(verse_number, '...')}\n"
+
+        return usfm_text
+
+    # --- Process all chapters ---
     for chapter_number, num_verses in enumerate(max_verses, start=1):
         try:
             num_verses = int(num_verses)

BACKEND/app/router.py

@@ -972,10 +972,24 @@ async def generate_usfm(
     # Validate if the book exists in metadata
 
     # Fetch chapters and verses
-    chapters = db.query(Chapter).filter(Chapter.book_id == book_id).all()
-    chapter_map = {chapter.chapter: chapter for chapter in chapters}
+    if chapter is not None:
+        chapters = (
+        db.query(Chapter)
+        .filter(Chapter.book_id == book_id, Chapter.chapter == chapter)
+        .all()
+        )
+        if not chapters:
+            raise HTTPException(
+            status_code=404,
+            detail=f"Chapter {chapter} not found in book {book}"
+        )
+    else:
+        chapters = db.query(Chapter).filter(Chapter.book_id == book_id).all()
+
+    # Prepare chapter map for downstream USFM generation
+    chapter_map = {ch.chapter: ch for ch in chapters}
     # Generate USFM content
-    usfm_text = crud.generate_usfm_content(book, book_info, chapter_map, versification_data, db)
+    usfm_text = crud.generate_usfm_content(book, book_info, chapter_map, versification_data, db, single_chapter=chapter)
     return crud.save_and_return_usfm_file(project, book, usfm_text)
 
 

UI/src/components/ChapterModal.tsx

@@ -20,6 +20,9 @@ import {
   clearStoredVersesForChapter,
   hasPendingChanges,
 } from "@/utils/chapterStorage";
+import useAuthStore from "@/store/useAuthStore";
+
+const BASE_URL = import.meta.env.VITE_BASE_URL;
 
 interface Verse {
   verse_id: number;
@@ -389,6 +392,54 @@ const ChapterModal: React.FC<ChapterModalProps> = ({
     return `${remaining} verse(s) left`;
   };
 
+  const handleDownloadChapter = async (
+    projectId: number,
+    bookName: string,
+    chapter: number
+  ) => {
+    try {
+      const response = await fetch(
+        `${BASE_URL}/generate-usfm/?project_id=${projectId}&book=${bookName}&chapter=${chapter}`,
+        {
+          method: "GET",
+          headers: {
+            Authorization: `Bearer ${useAuthStore.getState().token}`,
+            "Content-Type": "application/json",
+          },
+        }
+      );
+      if (!response.ok) {
+        const responseData = await response.json();
+        throw new Error(responseData.detail || "Failed to generate USFM");
+      }
+      const contentDisposition = response.headers.get("Content-Disposition");
+      let fileName = `${bookName}.usfm`;
+      if (contentDisposition) {
+        const match = contentDisposition.match(/filename="([^"]+)"/);
+        if (match && match[1]) {
+          fileName = match[1];
+        }
+      }
+      const blob = await response.blob();
+      const url = URL.createObjectURL(blob);
+      const link = document.createElement("a");
+      link.href = url;
+      link.download = fileName;
+      link.click();
+      URL.revokeObjectURL(url);
+      toast({
+        variant: "success",
+        title: "File downloaded successfully!",
+      });
+    } catch (error) {
+      toast({
+        variant: "destructive",
+        title:
+          error instanceof Error ? error.message : "Error while downloading",
+      });
+    }
+  };
+
   const handleCloseModal = () => {
     // Save changes if needed
     // if (
@@ -589,6 +640,12 @@ const ChapterModal: React.FC<ChapterModalProps> = ({
             >
               {approved ? "Unapprove" : "Approve"}
             </Button>
+            <Button
+              onClick={() => handleDownloadChapter(projectId, bookName, chapter.chapter)}
+              disabled={!approved || isSyncingChanges}
+            >
+              Download Text
+            </Button>
             <div
               onMouseEnter={() =>
                 toast({