refactor(api): Rewrite EPUBGenerator

src/api/src/create_book/generators/new_epub.py

@@ -0,0 +1,105 @@
+from io import BytesIO
+from typing import List
+
+from bs4 import BeautifulSoup
+from ebooklib import epub
+
+from ..models import Story
+
+
+class EPUBGenerator:
+    def __init__(
+        self,
+        metadata: Story,
+        part_trees: List[BeautifulSoup],
+        cover: bytes,
+        images: List[List[bytes]] | None,
+    ):
+        self.story = metadata
+        self.parts = part_trees
+        self.cover = cover
+        self.images = images
+
+        self.book = epub.EpubBook()
+
+    def add_metadata(self):
+        self.book.add_author(self.story["user"]["username"])
+
+        self.book.add_metadata("DC", "title", self.story["title"])
+        self.book.add_metadata("DC", "description", self.story["description"])
+        self.book.add_metadata("DC", "date", self.story["createDate"])
+        self.book.add_metadata("DC", "modified", self.story["modifyDate"])
+        self.book.add_metadata("DC", "language", self.story["language"]["name"])
+
+        self.book.add_metadata(
+            None, "meta", "", {"name": "tags", "content": ", ".join(self.story["tags"])}
+        )
+        self.book.add_metadata(
+            None,
+            "meta",
+            "",
+            {"name": "mature", "content": str(int(self.story["mature"]))},
+        )
+        self.book.add_metadata(
+            None,
+            "meta",
+            "",
+            {"name": "completed", "content": str(int(self.story["completed"]))},
+        )
+
+    def add_cover(self):
+        self.book.set_cover("cover.jpg", self.cover)
+        cover_chapter = epub.EpubHtml(
+            file_name="titlepage.xhtml",  # Standard for cover page
+        )
+        cover_chapter.set_content('<img src="cover.jpg">')
+        self.book.add_item(cover_chapter)
+
+    def add_chapters(self):
+        chapters = []
+
+        for idx, (part, tree) in enumerate(zip(self.story["parts"], self.parts)):
+            chapter = epub.EpubHtml(
+                title=part["title"], file_name=f"{idx}_{part['id']}"
+            )
+
+            if self.images:
+                for img_idx, (img_data, img_tag) in enumerate(
+                    zip(self.images[idx], tree.find_all("img"))
+                ):
+                    path = f"static/{idx}_{part['id']}/{img_idx}.jpeg"
+                    img = epub.EpubImage(
+                        media_type="image/jpeg", content=img_data, file_name=path
+                    )
+                    self.book.add_item(img)
+
+                    img_tag["src"] = path
+
+            chapter.set_content(tree.prettify())
+            self.book.add_item(chapter)
+            chapters.append(chapter)
+
+        # ! Review, are these needed? #11
+        self.book.toc = chapters
+
+        # Thanks https://github.com/aerkalov/ebooklib/blob/master/samples/09_create_image/create.py
+        self.epub.add_item(epub.EpubNcx())
+        self.epub.add_item(epub.EpubNav())
+
+        # create spine
+        self.epub.spine = ["nav"] + chapters
+
+    def compile(self):
+        self.add_metadata()
+        self.add_cover()
+        self.add_chapters()
+        return True
+
+    def dump(self) -> BytesIO:
+        # Thanks https://stackoverflow.com/a/75398222
+        buffer = BytesIO()
+        epub.write_epub(buffer, self.book)
+
+        buffer.seek(0)
+
+        return buffer