Flask_web-template/app/routes/post.py

from flask import (
    Blueprint, render_template, redirect, url_for,
    flash, request, jsonify, current_app
)
from flask_login import login_required, current_user
from app.services import PostService, CommentService, LikeService


post_bp = Blueprint('post', __name__, url_prefix='/posts')

# 配置常量
POSTS_PER_PAGE = 10

@post_bp.route('/')
def index():
    """
    文章列表頁面
    支援搜索和分頁功能
    """
    page = request.args.get('page', 1, type=int)
    search_query = request.args.get('q')

    # 根據是否有搜索關鍵字決定查詢方式
    if search_query:
        pagination = PostService.search_posts(
            query=search_query,
            page=page,
            per_page=POSTS_PER_PAGE
        )
    else:
        pagination = PostService.get_posts_page(
            page=page,
            per_page=POSTS_PER_PAGE
        )

    return render_template('posts/index.html',
                           title='文章列表',
                           posts=pagination,
                           search_query=search_query)

@post_bp.route('/create', methods=['GET', 'POST'])
@login_required
def create():
    """
    創建新文章
    GET: 顯示創建文章表單
    POST: 處理文章創建請求
    """
    if request.method == 'POST':
        post_data = {
            'title': request.form.get('title', '').strip(),
            'content': request.form.get('content', '').strip()
        }

        post, error = PostService.create_post(
            user_id=current_user.id,
            **post_data
        )

        if error:
            flash(error, 'danger')
            return redirect(url_for('post.create'))

        flash('文章發布成功！', 'success')
        return redirect(url_for('post.show', id=post.id))

    return render_template('posts/create.html', title='發布文章')

@post_bp.route('/<int:id>')
def show(id):
    """
    顯示文章詳情

    Args:
        id: 文章ID
    """
    post = PostService.get_post_by_id(id)
    if not post:
        flash('文章不存在', 'danger')
        return redirect(url_for('post.index'))

    return render_template('posts/show.html',
                           title=post.title,
                           post=post)

@post_bp.route('/<int:id>/edit', methods=['GET', 'POST'])
@login_required
def edit(id):
    """
    編輯文章
    GET: 顯示編輯表單
    POST: 處理文章更新請求

    Args:
        id: 文章ID
    """
    post = PostService.get_post_by_id(id)
    if not post or post.user_id != current_user.id:
        flash('無權限編輯此文章', 'danger')
        return redirect(url_for('post.index'))

    if request.method == 'POST':
        post_data = {
            'title': request.form.get('title', '').strip(),
            'content': request.form.get('content', '').strip()
        }

        success, error = PostService.update_post(
            post_id=id,
            **post_data
        )

        if not success:
            flash(error, 'danger')
            return redirect(url_for('post.edit', id=id))

        flash('文章已更新', 'success')
        return redirect(url_for('post.show', id=id))

    return render_template('posts/edit.html',
                           title='編輯文章',
                           post=post)

@post_bp.route('/<int:id>/delete', methods=['POST'])
@login_required
def delete(id):
    """
    刪除文章

    Args:
        id: 文章ID
    """
    post = PostService.get_post_by_id(id)
    if not post or post.user_id != current_user.id:
        flash('無權限刪除此文章', 'danger')
        return redirect(url_for('post.index'))

    success, error = PostService.delete_post(id)
    if not success:
        flash(error, 'danger')
        return redirect(url_for('post.show', id=id))

    flash('文章已刪除', 'success')
    return redirect(url_for('post.index'))

@post_bp.route('/<int:post_id>/like', methods=['POST'])
@login_required
def toggle_like(post_id):
    """
    切換文章按讚狀態

    Args:
        post_id: 文章ID

    Returns:
        JSON響應，包含操作結果和最新按讚數
    """
    success, is_liked, count = LikeService.toggle_like(
        user_id=current_user.id,
        post_id=post_id
    )

    if success:
        return jsonify({
            'success': True,
            'liked': is_liked,
            'count': count
        })

    return jsonify({
        'success': False,
        'message': '操作失敗'
    }), 500

@post_bp.route('/<int:post_id>/comments', methods=['POST'])
@login_required
def create_comment(post_id):
    """
    創建文章評論

    Args:
        post_id: 文章ID
    """
    comment_data = {
        'content': request.form.get('content', '').strip(),
        'parent_id': request.form.get('parent_id', type=int)
    }

    success, error = CommentService.create_comment(
        user_id=current_user.id,
        post_id=post_id,
        **comment_data
    )

    flash('留言成功' if success else f'留言失敗: {error}',
          'success' if success else 'danger')

    return redirect(url_for('post.show', id=post_id))

@post_bp.route('/comments/<int:comment_id>', methods=['DELETE'])
@login_required
def delete_comment(comment_id):
    """
    刪除評論

    Args:
        comment_id: 評論ID

    Returns:
        JSON響應，包含操作結果
    """
    comment = CommentService.get_comment_by_id(comment_id)
    if not comment:
        return jsonify({
            'success': False,
            'message': '留言不存在'
        }), 404

    if comment.user_id != current_user.id:
        return jsonify({
            'success': False,
            'message': '無權限刪除此留言'
        }), 403

    success, error = CommentService.delete_comment(comment_id)

    if success:
        return jsonify({'success': True})

    return jsonify({
        'success': False,
        'message': error
    }), 500