refactor: restructure api module and implement articles pagination with dynamic routing

app/api/articles.py

@@ -0,0 +1,38 @@
+import requests
+
+API_BASE_URL = 'http://localhost:8000/api'
+
+def list_articles(page=1, search=None, token=None):
+    params = {'page' : page}
+
+    if search:
+        params['search'] = search
+
+    headers = {}
+    if token:
+        headers['Authorization'] = f"Bearer {token}"
+
+    r = requests.get(
+        f"{API_BASE_URL}/articles",
+        params=params,
+        headers=headers,
+        timeout=10
+    )
+
+    r.raise_for_status()
+    return r.json()
+
+def get_article(article_id, token=None):
+    headers={}
+
+    if token:
+        headers['Authorization'] = f"Bearer {token}"
+
+    r = requests.get(
+        f"{API_BASE_URL}/articles/{article_id}",
+        headers = headers,
+        timeout = 10
+    )
+
+    r.raise_for_status()
+    return r.json()

app/pages/article_detail.py

@@ -0,0 +1,35 @@
+import asyncio
+
+import flet as ft
+
+from app.api.articles import get_article
+from app.state import state
+
+
+def article_detail_page(page: ft.Page, article_id: int):
+    content = ft.Column(expand=True)
+
+    async def load_article():
+        content.controls.clear()
+        content.controls.append(ft.ProgressRing())
+        page.update()
+
+        article = await asyncio.to_thread(
+            get_article,
+            article_id,
+            state.access_token
+        )
+
+        content.controls.clear()
+        content.controls.extend([
+            ft.Text(article['title'], size=16, weight=ft.FontWeight.BOLD),
+            ft.Text(article['body']),
+            ft.FilledButton(
+                'ย้อนกลับ',
+                on_click=lambda e: asyncio.create_task(page.push_route('/articles'))
+            )
+        ])
+        page.update()
+
+    asyncio.create_task(load_article())
+    return content

app/pages/articles.py

@@ -1,7 +1,107 @@
+import asyncio
+
 import flet as ft
 
-def articles_page():
-    return ft.Column([
-        ft.Text("บทความ", size=22),
-        ft.Text("รายการบทความจะมาอยู่ตรงนี้"),
-    ])
+from app.api.articles import list_articles
+
+from app.state import state
+
+def article_card(page, article):
+    async def go_detail(e):
+        await page.push_route(f"/articles/{article['id']}")
+
+    return ft.Card(
+        content=ft.Container(
+            padding=15,
+            content=ft.Column(
+                controls=[
+                    ft.Text(article['title'], size=18, weight=ft.FontWeight.BOLD),
+                    ft.Text(article.get('body', ''), max_lines=2),
+                    ft.TextButton(
+                        'อ่านต่อ',
+                        on_click=go_detail,
+                    )
+                ]
+            )
+        )
+    )
+
+def articles_page(page: ft.Page):
+    articles_column = ft.Column(expand=True, spacing=10)
+    search_field = ft.TextField(
+            hint_text="ค้นหาบทความ",
+            prefix_icon=ft.Icons.SEARCH,
+        )
+
+    current_page = {'value':1}
+
+    page_text = ft.Text(value=f"หน้า {current_page['value']}")
+    # สร้างปุ่ม
+    btn_prev = ft.OutlinedButton('ก่อนหน้า', disabled=True)
+    btn_next = ft.OutlinedButton('ถัดไป', disabled=True)
+
+    async def load_articles():
+        articles_column.controls.clear()
+        articles_column.controls.append(ft.ProgressRing())
+
+        btn_prev.disabled = True
+        btn_next.disabled = True
+
+        page.update()
+
+        try:
+            data = await asyncio.to_thread(
+                list_articles,
+                page=current_page['value'],
+                search=search_field.value,
+                token=state.access_token,
+            )
+
+            # อัปเดตสถานะปุ่มจากข้อมูล Backend
+            btn_prev.disabled = data.get('previous') is None
+            btn_next.disabled = data.get('next') is None
+            page_text.value = f"หน้า {current_page['value']}"
+
+            articles_column.controls.clear()
+            for item in data.get('results', []):
+                articles_column.controls.append(article_card(page, item))
+
+            if not data.get('results'):
+                articles_column.controls.append(ft.Text("ไม่พบบทความ"))
+
+        except Exception as e:
+            articles_column.controls.clear()
+            articles_column.controls.append(ft.Text(f"เกิดข้อผิดพลาด: {e}", color=ft.Colors.RED))
+            btn_prev.disabled = current_page['value'] <= 1
+            btn_next.disabled = True
+
+        page.update()
+
+    # Logic การเปลี่ยนหน้า
+    async def change_page(delta):
+        current_page['value'] += delta
+        await load_articles()
+    btn_prev.on_click = lambda e: asyncio.create_task(change_page(-1))
+    btn_next.on_click = lambda e: asyncio.create_task(change_page(1))
+
+    def on_search(e):
+        current_page['value'] = 1
+        asyncio.create_task(load_articles())
+
+    search_field.on_submit = on_search
+
+    controls = ft.Column(
+        controls=[
+            ft.Text('บทความ', size=24),
+            ft.Row([search_field]),
+            articles_column,
+            ft.Row(
+                controls=[btn_prev, page_text, btn_next],
+                alignment=ft.MainAxisAlignment.CENTER
+            )
+        ],
+        expand=True,
+    )
+
+    asyncio.create_task(load_articles())
+    return controls

app/pages/courses.py

@@ -1,6 +1,6 @@
 import flet as ft
 
-def courses_page():
+def courses_page(page: ft.Page):
     return ft.Column([
         ft.Text("หลักสูตร", size=22),
         ft.Text("รายการหลักสูตร")

app/pages/login.py

@@ -1,7 +1,7 @@
 import flet as ft
 import asyncio
 
-from app.api import login, get_me
+from app.api.auth import login, get_me
 from app.state import state
 
 def login_page(page: ft.Page, on_login_success):

app/pages/my_courses.py

@@ -1,6 +1,6 @@
 import flet as ft
 
-def my_courses_page():
+def my_courses_page(page: ft.Page):
     return ft.Column([
         ft.Text('หลักสูตรของฉัน', size=22),
         ft.Text('ข้อมูลหลักสูตรที่ลงทะเบียน')

app/pages/profile.py

@@ -1,6 +1,6 @@
 import flet as ft
 
-def profile_page():
+def profile_page(page: ft.Page):
     return ft.Column([
         ft.Text("ข้อมูลผู้ใช้งาน", size=22),
         ft.Text("รายละเอียดข้อมูลผู้ใช้งานจะมาอยู่ตรงนี้"),

app/pages/progress.py

@@ -1,6 +1,6 @@
 import flet as ft
 
-def progress_page():
+def progress_page(page: ft.Page):
     return ft.Column([
         ft.Text('ความก้าวหน้าของฉัน', size=22),
         ft.Text('รายละเอียดความก้าวหน้าของฉัน')