feat(backend): init course metadata service

src/routers/courses/courses.py

@@ -1,7 +1,7 @@
 from fastapi import APIRouter, Depends, UploadFile, Form
 from src.dependencies.auth import get_current_user
 
-from src.services.courses.courses import Course,  create_course,  get_course, get_courses, update_course, delete_course, update_course_thumbnail
+from src.services.courses.courses import Course,  create_course,  get_course, get_course_meta, get_courses, update_course, delete_course, update_course_thumbnail
 from src.services.users import PublicUser
 
 
@@ -34,6 +34,14 @@ async def api_get_course(course_id: str,  current_user: PublicUser = Depends(get
     return await get_course(course_id, current_user=current_user)
 
 
+@router.get("/meta/{course_id}")
+async def api_get_course_meta(course_id: str,  current_user: PublicUser = Depends(get_current_user)):
+    """
+    Get single Course Metadata (chapters, elements) by course_id
+    """
+    return await get_course_meta(course_id, current_user=current_user)
+
+
 @router.get("/{org_id}/page/{page}/limit/{limit}")
 async def api_get_course_by(page: int, limit: int, org_id: str):
     """
@@ -56,4 +64,4 @@ async def api_delete_course(course_id: str, current_user: PublicUser = Depends(g
     Delete Course by ID
     """
 
-    return await delete_course(course_id, current_user)
+    return await delete_course(course_id, current_user)

src/services/courses/courses.py

@@ -3,6 +3,7 @@ import os
 from typing import List
 from uuid import uuid4
 from pydantic import BaseModel
+from src.services.courses.elements import ElementInDB
 from src.services.uploads import upload_thumbnail
 from src.services.users import PublicUser, User
 from src.services.database import create_config_collection, check_database, create_database, learnhouseDB
@@ -30,6 +31,21 @@ class CourseInDB(Course):
     updateDate: str
     authors: List[str]
 
+
+# TODO : wow terrible, fix this
+# those models need to be available only in the chapters service
+class CourseChapter(BaseModel):
+    name: str
+    description: str
+    elements: list
+
+
+class CourseChapterInDB(CourseChapter):
+    coursechapter_id: str
+    course_id: str
+    creationDate: str
+    updateDate: str
+
 #### Classes ####################################################
 
 # TODO : Add courses photo & cover upload and delete
@@ -56,6 +72,61 @@ async def get_course(course_id: str, current_user: PublicUser):
     return course
 
 
+async def get_course_meta(course_id: str, current_user: PublicUser):
+    await check_database()
+    courses = learnhouseDB["courses"]
+    coursechapters = learnhouseDB["coursechapters"]
+    course = courses.find_one({"course_id": course_id})
+    elements = learnhouseDB["elements"]
+
+
+    # verify course rights
+    await verify_rights(course_id, current_user, "read")
+
+    if not course:
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT, detail="Course does not exist")
+
+
+    coursechapters = coursechapters.find(
+        {"course_id": course_id}).sort("name", 1)
+
+    # elements
+    coursechapter_elementIds_global = []
+
+    # chapters
+    chapters = {}
+    for coursechapter in coursechapters:
+        coursechapter = CourseChapterInDB(**coursechapter)
+        coursechapter_elementIds = []
+
+        for element in coursechapter.elements:
+            coursechapter_elementIds.append(element)
+            coursechapter_elementIds_global.append(element)
+
+        chapters[coursechapter.coursechapter_id] = {
+            "id": coursechapter.coursechapter_id, "name": coursechapter.name,  "elementIds": coursechapter_elementIds
+        }
+
+    # elements
+    elements_list = {}
+    for element in elements.find({"element_id": {"$in": coursechapter_elementIds_global}}):
+        element = ElementInDB(**element)
+        elements_list[element.element_id] = {
+            "id": element.element_id, "name": element.name, "type": element.type, "content": element.content
+        }
+
+    chapters_list_with_elements = []
+    for chapter in chapters:
+        chapters_list_with_elements.append(
+            {"id": chapters[chapter]["id"], "name": chapters[chapter]["name"], "elements": [elements_list[element] for element in chapters[chapter]["elementIds"]]})
+    course = Course(**course)
+    return {
+        "course": course,
+        "chapters": chapters_list_with_elements,
+    }
+
+
 async def create_course(course_object: Course, org_id: str, current_user: PublicUser, thumbnail_file: UploadFile | None = None):
     await check_database()
     courses = learnhouseDB["courses"]