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社区交流系统概述
社区交流系统为用户提供了与其他植物爱好者交流的平台。在Cordova框架与OpenHarmony系统的结合下，我们需要实现一个完整的社区系统，包括讨论、评论和用户互动功能。
社区内容数据模型
javascript
class CommunityPost {
constructor(userId, title, content) {
this.id = 'post_' + Date.now();
this.userId = userId;
this.title = title;
this.content = content;
this.createdDate = new Date();
this.likes = 0;
this.comments = [];
this.tags = [];
}
}
class CommunityComment {
constructor(userId, content) {
this.id = 'comment_' + Date.now();
this.userId = userId;
this.content = content;
this.createdDate = new Date();
this.likes = 0;
}
}
class CommunityManager {
constructor() {
this.posts = [];
this.users = new Map();
this.loadFromStorage();
}
createPost(userId, title, content, tags) {
const post = new CommunityPost(userId, title, content);
post.tags = tags;
this.posts.push(post);
this.saveToStorage();
return post;
}
addComment(postId, userId, content) {
const post = this.posts.find(p => p.id === postId);
if (post) {
const comment = new CommunityComment(userId, content);
post.comments.push(comment);
this.saveToStorage();
return comment;
}
return null;
}
likePost(postId) {
const post = this.posts.find(p => p.id === postId);
if (post) {
post.likes++;
this.saveToStorage();
}
}
}这个社区交流数据模型定义了CommunityPost、CommunityComment和CommunityManager类。
与OpenHarmony的集成
javascript
function loadCommunityPostsFromServer() {
cordova.exec(
function(result) {
console.log("社区帖子已加载");
renderCommunityFeed(result);
},
function(error) {
console.error("加载失败:", error);
},
"NetworkPlugin",
"getCommunityPosts",
[{
limit: 20,
offset: 0
}]
);
}
function syncCommunityData() {
cordova.exec(
function(result) {
console.log("社区数据已同步");
},
function(error) {
console.error("同步失败:", error);
},
"NetworkPlugin",
"syncCommunityData",
[{
posts: communityManager.posts
}]
);
}这段代码展示了如何与OpenHarmony的网络服务集成，加载和同步社区数据。
社区动态展示
javascript
function renderCommunityFeed() {
const container = document.getElementById('page-container');
container.innerHTML = `
<div class="community-feed">
<h2>社区交流</h2>
<button onclick="showCreatePostDialog()">✍️ 发布帖子</button>
</div>
`;
if (communityManager.posts.length === 0) {
container.innerHTML += '<p class="empty-message">还没有帖子</p>';
return;
}
const feedList = document.createElement('div');
feedList.className = 'feed-list';
communityManager.posts.forEach(post => {
const postCard = document.createElement('div');
postCard.className = 'post-card';
postCard.innerHTML = `
<div class="post-header">
<h3>${post.title}</h3>
<p class="post-date">${post.createdDate.toLocaleString('zh-CN')}</p>
</div>
<p class="post-content">${post.content}</p>
<div class="post-tags">
${post.tags.map(tag => `<span class="tag">#${tag}</span>`).join('')}
</div>
<div class="post-stats">
<span>👍 ${post.likes}</span>
<span>💬 ${post.comments.length}</span>
</div>
<div class="post-actions">
<button onclick="likePost('${post.id}')">👍 赞</button>
<button onclick="showCommentDialog('${post.id}')">💬 评论</button>
</div>
<div class="post-comments">
${post.comments.slice(0, 3).map(comment => `
<div class="comment">
<p>${comment.content}</p>
<p class="comment-date">${comment.createdDate.toLocaleString('zh-CN')}</p>
</div>
`).join('')}
${post.comments.length > 3 ? `<p class="more-comments">查看全部${post.comments.length}条评论</p>` : ''}
</div>
`;
feedList.appendChild(postCard);
});
container.appendChild(feedList);
}这个函数负责渲染社区动态。
发布帖子
javascript
function showCreatePostDialog() {
const dialog = document.createElement('div');
dialog.className = 'modal-dialog';
dialog.innerHTML = `
<div class="modal-content">
<h3>发布帖子</h3>
<form id="create-post-form">
<div class="form-group">
<label>标题</label>
<input type="text" id="post-title" required>
</div>
<div class="form-group">
<label>内容</label>
<textarea id="post-content" required></textarea>
</div>
<div class="form-group">
<label>标签 (用逗号分隔)</label>
<input type="text" id="post-tags" placeholder="植物养护,经验分享">
</div>
<div class="form-actions">
<button type="submit">发布</button>
<button type="button" onclick="closeDialog()">取消</button>
</div>
</form>
</div>
`;
document.getElementById('modal-container').appendChild(dialog);
document.getElementById('create-post-form').addEventListener('submit', function(e) {
e.preventDefault();
const title = document.getElementById('post-title').value;
const content = document.getElementById('post-content').value;
const tagsStr = document.getElementById('post-tags').value;
const tags = tagsStr.split(',').map(t => t.trim());
const post = communityManager.createPost(getCurrentUserId(), title, content, tags);
syncCommunityData();
closeDialog();
renderCommunityFeed();
showToast('帖子已发布');
});
}这个函数创建发布帖子的对话框。
评论功能
javascript
function showCommentDialog(postId) {
const dialog = document.createElement('div');
dialog.className = 'modal-dialog';
dialog.innerHTML = `
<div class="modal-content">
<h3>添加评论</h3>
<form id="add-comment-form">
<div class="form-group">
<label>评论内容</label>
<textarea id="comment-content" required></textarea>
</div>
<div class="form-actions">
<button type="submit">发布评论</button>
<button type="button" onclick="closeDialog()">取消</button>
</div>
</form>
</div>
`;
document.getElementById('modal-container').appendChild(dialog);
document.getElementById('add-comment-form').addEventListener('submit', function(e) {
e.preventDefault();
const content = document.getElementById('comment-content').value;
communityManager.addComment(postId, getCurrentUserId(), content);
syncCommunityData();
closeDialog();
renderCommunityFeed();
showToast('评论已发布');
});
}
function likePost(postId) {
communityManager.likePost(postId);
syncCommunityData();
renderCommunityFeed();
}这段代码实现了评论和点赞功能。
社区统计
javascript
class CommunityStatistics {
constructor() {
this.communityManager = communityManager;
}
getTotalPosts() {
return this.communityManager.posts.length;
}
getTotalComments() {
return this.communityManager.posts.reduce((sum, post) =>
sum + post.comments.length, 0
);
}
getMostPopularPost() {
return this.communityManager.posts.reduce((max, post) =>
post.likes > max.likes ? post : max
);
}
getMostUsedTags() {
const tagCounts = {};
this.communityManager.posts.forEach(post => {
post.tags.forEach(tag => {
tagCounts[tag] = (tagCounts[tag] || 0) + 1;
});
});
return Object.entries(tagCounts)
.sort((a, b) => b[1] - a[1])
.slice(0, 10)
.map(([tag, count]) => ({ tag, count }));
}
}这个CommunityStatistics类提供了社区的统计功能。
总结
社区交流系统为用户提供了与其他植物爱好者交流的平台。通过帖子、评论和点赞功能，我们可以创建一个活跃的社区，促进用户之间的互动和知识分享。
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