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* 帖子编辑器Hook
* 管理帖子创建/编辑的所有状态和逻辑
*/
import { useCallback, useState } from 'react';
import * as ImagePicker from 'expo-image-picker';
import { supabaseForumService, type Post, type PostCategory } from '@/src/lib/supabase';
import { MEDIA_LIMITS } from '../constants';
export interface MediaFile {
uri: string;
name: string;
type: string;
size?: number;
/** 标记为已存在的媒体（来自服务器的 URL） */
isExisting?: boolean;
}
export interface PostEditorState {
content: string;
category?: PostCategory;
tagsText: string;
pickedFiles: MediaFile[];
submitting: boolean;
}
export interface UsePostEditorOptions {
onSuccess?: () => void;
onError?: (error: Error) => void;
}
export interface ValidationResult {
valid: boolean;
error?: string;
}
/**
* 帖子编辑器 Hook
* 封装了帖子创建/编辑的完整业务逻辑
*/
export function usePostEditor(options: UsePostEditorOptions = {}) {
const [state, setState] = useState<PostEditorState>({
content: '',
category: undefined,
tagsText: '',
pickedFiles: [],
submitting: false,
});
// ========== State Setters ==========
const setContent = useCallback((content: string) => {
setState((prev) => ({ ...prev, content }));
}, []);
const setCategory = useCallback((category: PostCategory | undefined) => {
setState((prev) => ({ ...prev, category }));
}, []);
const setTagsText = useCallback((tagsText: string) => {
setState((prev) => ({ ...prev, tagsText }));
}, []);
const setPickedFiles = useCallback((files: MediaFile[]) => {
setState((prev) => ({ ...prev, pickedFiles: files }));
}, []);
const addFiles = useCallback((files: MediaFile[]) => {
setState((prev) => ({
...prev,
pickedFiles: [...prev.pickedFiles, ...files],
}));
}, []);
const removeFile = useCallback((index: number) => {
setState((prev) => ({
...prev,
pickedFiles: prev.pickedFiles.filter((_, i) => i !== index),
}));
}, []);
const setSubmitting = useCallback((submitting: boolean) => {
setState((prev) => ({ ...prev, submitting }));
}, []);
// ========== Utility Functions ==========
/**
* 解析标签文本为数组
*/
const parseTags = useCallback((text: string): string[] => {
return text
.split(/[，,\s]+/)
.map((s) => s.trim())
.filter(Boolean);
}, []);
/**
* 获取解析后的标签
*/
const getParsedTags = useCallback(() => {
return parseTags(state.tagsText);
}, [state.tagsText, parseTags]);
/**
* 验证表单数据
*/
const validate = useCallback((): ValidationResult => {
if (!state.content.trim() && state.pickedFiles.length === 0) {
return { valid: false, error: '请输入内容或选择媒体' };
}
Iif (state.pickedFiles.length > MEDIA_LIMITS.MAX_FILES_COUNT) {
return { valid: false, error: `最多可上传 ${MEDIA_LIMITS.MAX_FILES_COUNT} 个文件` };
}
return { valid: true };
}, [state.content, state.pickedFiles]);
/**
* 重置表单
*/
const reset = useCallback(() => {
setState({
content: '',
category: undefined,
tagsText: '',
pickedFiles: [],
submitting: false,
});
}, []);
/**
* 从帖子加载数据（用于编辑）
*/
const loadFromPost = useCallback((post: Post) => {
// 将现有媒体转换为 MediaFile 格式
const existingMedia: MediaFile[] = (post.media || []).map((m) => ({
uri: m.fileUrl,
name: m.fileUrl.split('/').pop() || `media_${m.id}`,
type: m.mediaType === 'video' ? 'video/mp4' : 'image/jpeg',
// 标记为已存在的媒体（URL 而非本地文件）
isExisting: true,
})) as MediaFile[];
setState({
content: post.content || '',
category: post.category,
tagsText: (post.tags || []).join(' '),
pickedFiles: existingMedia,
submitting: false,
});
}, []);
// ========== Media Handling ==========
/**
* 选择图片/视频
*/
const pickMedia = useCallback(async (): Promise<MediaFile[]> => {
console.log('[usePostEditor] pickMedia called');
try {
// 1. 请求媒体库权限
console.log('[usePostEditor] Requesting media library permissions...');
const { status } = await ImagePicker.requestMediaLibraryPermissionsAsync();
console.log('[usePostEditor] Permission status:', status);
if (status !== 'granted') {
throw new Error('需要媒体库访问权限才能选择图片');
}
// 2. 打开图片选择器
console.log('[usePostEditor] Launching image library...');
const result = await ImagePicker.launchImageLibraryAsync({
mediaTypes: ['images', 'videos'],
allowsMultipleSelection: true,
quality: 0.8,
});
console.log(
'[usePostEditor] Image picker result:',
result.canceled ? 'canceled' : 'selected'
);
Iif (result.canceled) {
return [];
}
const accepted: MediaFile[] = [];
const currentCount = state.pickedFiles.length;
for (let idx = 0; idx < result.assets.length; idx++) {
const asset = result.assets[idx];
const mime = asset.mimeType || (asset.type === 'video' ? 'video/mp4' : 'image/jpeg');
const isValidType = mime.startsWith('image/') || mime.startsWith('video/');
const size = (asset as any).fileSize || (asset as any).size || 0;
// 验证文件类型
Iif (!isValidType) continue;
// 验证文件大小
Iif (size && size > MEDIA_LIMITS.MAX_FILE_SIZE) continue;
// 验证文件数量
Iif (currentCount + accepted.length >= MEDIA_LIMITS.MAX_FILES_COUNT) break;
accepted.push({
uri: asset.uri,
name:
(asset.fileName || `media_${Date.now()}_${idx}`) +
(asset.type === 'video' ? '.mp4' : '.jpg'),
type: mime,
size,
});
}
return accepted;
} catch (error) {
console.error('选择媒体失败:', error);
throw new Error('选择媒体失败，请重试');
}
}, [state.pickedFiles.length]);
/**
* 拍照
*/
const takePhoto = useCallback(async (): Promise<MediaFile[]> => {
console.log('[usePostEditor] takePhoto called');
try {
// 1. 请求相机权限
console.log('[usePostEditor] Requesting camera permissions...');
const { status } = await ImagePicker.requestCameraPermissionsAsync();
console.log('[usePostEditor] Camera permission status:', status);
if (status !== 'granted') {
throw new Error('需要相机访问权限才能拍照');
}
// 2. 打开相机
console.log('[usePostEditor] Launching camera...');
const result = await ImagePicker.launchCameraAsync({
mediaTypes: ['images', 'videos'],
quality: 0.8,
allowsEditing: true,
});
console.log('[usePostEditor] Camera result:', result.canceled ? 'canceled' : 'captured');
if (result.canceled) {
return [];
}
const accepted: MediaFile[] = [];
const currentCount = state.pickedFiles.length;
for (let idx = 0; idx < result.assets.length; idx++) {
const asset = result.assets[idx];
const mime = asset.mimeType || (asset.type === 'video' ? 'video/mp4' : 'image/jpeg');
const size = (asset as any).fileSize || (asset as any).size || 0;
// 验证文件数量
if (currentCount + accepted.length >= MEDIA_LIMITS.MAX_FILES_COUNT) break;
accepted.push({
uri: asset.uri,
name:
(asset.fileName || `photo_${Date.now()}_${idx}`) +
(asset.type === 'video' ? '.mp4' : '.jpg'),
type: mime,
size,
});
}
return accepted;
} catch (error) {
console.error('拍照失败:', error);
throw new Error('拍照失败，请重试');
}
}, [state.pickedFiles.length]);
// ========== Submit Logic ==========
/**
* 提交帖子（创建或更新）
* 这是核心业务逻辑，完全封装在 Hook 中
*/
const submit = useCallback(
async (editingPost?: Post | null) => {
console.log('[usePostEditor] submit called');
// 1. 验证
const validation = validate();
console.log('[usePostEditor] validation result:', validation);
Iif (!validation.valid) {
const error = new Error(validation.error);
options.onError?.(error);
throw error;
}
// 2. 准备数据
const tags = getParsedTags();
// 只上传新添加的媒体文件（排除已存在的）
const newMediaFiles = state.pickedFiles
.filter((file) => !file.isExisting)
.map((file) => ({
uri: file.uri,
name: file.name,
type: file.type,
}));
const postData = {
content: state.content.trim(),
tags,
category: state.category,
// 传递媒体文件用于上传（只包含新文件）
mediaFiles: newMediaFiles,
};
console.log('[usePostEditor] postData:', {
...postData,
mediaFiles: postData.mediaFiles.length,
});
try {
setSubmitting(true);
// 3. 调用 API
if (editingPost) {
// 更新现有帖子
console.log('[usePostEditor] updating post:', editingPost.id);
const { error } = await supabaseForumService.updatePost(editingPost.id, postData);
Iif (error) {
console.error('[usePostEditor] update error:', error);
throw error;
}
} else {
// 创建新帖子
console.log(
'[usePostEditor] creating new post with',
postData.mediaFiles.length,
'media files'
);
const { data, error } = await supabaseForumService.createPost(postData);
console.log('[usePostEditor] createPost result:', { data, error });
if (error) {
console.error('[usePostEditor] create error:', error);
throw error;
}
}
// 4. 成功后清理
console.log('[usePostEditor] submit successful');
reset();
options.onSuccess?.();
} catch (error) {
console.error('[usePostEditor] 提交帖子失败:', error);
const err = error instanceof Error ? error : new Error('提交失败，请重试');
options.onError?.(err);
throw err;
} finally {
setSubmitting(false);
}
},
[state, validate, getParsedTags, reset, options, setSubmitting]
);
// ========== Return API ==========
return {
// State
content: state.content,
category: state.category,
tagsText: state.tagsText,
pickedFiles: state.pickedFiles,
submitting: state.submitting,
// Computed
parsedTags: getParsedTags(),
// Setters
setContent,
setCategory,
setTagsText,
setPickedFiles,
addFiles,
removeFile,
// Actions
reset,
loadFromPost,
validate,
pickMedia,
takePhoto,
submit, // ✅ 新增：完整的提交方法
};
}
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