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| 1 | +import { Ref, unref, watchEffect } from 'vue' |
| 2 | +import { |
| 3 | + UseRequestFetchState, |
| 4 | + UseRequestOptions, |
| 5 | + UseRequestPluginReturn, |
| 6 | + UseRequestService, |
| 7 | +} from './types' |
| 8 | + |
| 9 | +export default class Fetch<TData, TParams extends unknown[] = any> { |
| 10 | + pluginImpls: UseRequestPluginReturn<TData, TParams>[] | undefined |
| 11 | + |
| 12 | + count = 0 |
| 13 | + |
| 14 | + state: UseRequestFetchState<TData, TParams> = { |
| 15 | + loading: false, |
| 16 | + params: undefined, |
| 17 | + data: undefined, |
| 18 | + error: undefined, |
| 19 | + } |
| 20 | + |
| 21 | + constructor( |
| 22 | + public serviceRef: Ref<UseRequestService<TData, TParams>>, |
| 23 | + public options: UseRequestOptions<TData, TParams, any>, |
| 24 | + public setUpdateData: (s: any, key?: keyof UseRequestFetchState<TData, TParams>) => void, |
| 25 | + public initState: Partial<UseRequestFetchState<TData, TParams>> = {}, |
| 26 | + ) { |
| 27 | + this.state = { |
| 28 | + ...this.state, |
| 29 | + loading: !options.manual, |
| 30 | + ...initState, |
| 31 | + } |
| 32 | + } |
| 33 | + |
| 34 | + // 设置state |
| 35 | + setState(s: Partial<UseRequestFetchState<TData, TParams>> = {}) { |
| 36 | + this.state = { |
| 37 | + ...this.state, |
| 38 | + ...s, |
| 39 | + } |
| 40 | + this.setUpdateData(this.state) |
| 41 | + } |
| 42 | + |
| 43 | + /** |
| 44 | + * |
| 45 | + * @param data Result value `any` |
| 46 | + * @param key Result key `data`| `params` | `loading`| `error` |
| 47 | + */ |
| 48 | + setData( |
| 49 | + data: any, |
| 50 | + key?: |
| 51 | + | keyof UseRequestFetchState<TData, TParams> |
| 52 | + | (keyof UseRequestFetchState<TData, TParams>)[], |
| 53 | + ) { |
| 54 | + if (key instanceof Array) { |
| 55 | + key.forEach(k => { |
| 56 | + this.state[k as keyof UseRequestFetchState<TData, TParams>] = data |
| 57 | + this.setUpdateData(data, k) |
| 58 | + }) |
| 59 | + } else { |
| 60 | + this.state[key as keyof UseRequestFetchState<TData, TParams>] = data |
| 61 | + this.setUpdateData(data, key) |
| 62 | + } |
| 63 | + } |
| 64 | + |
| 65 | + // 遍历需要运行的插件，是一个回调函数，供插件获取fetch实例和在对应节点执行插件逻辑 |
| 66 | + runPluginHandler(event: keyof UseRequestPluginReturn<TData, TParams>, ...rest: any[]) { |
| 67 | + // @ts-ignore |
| 68 | + const r = (this.pluginImpls?.map(i => i[event]?.(...rest)) ?? [])?.filter(Boolean) |
| 69 | + // @ts-ignore |
| 70 | + return Object.assign({}, ...r) |
| 71 | + } |
| 72 | + |
| 73 | + // 异步请求 |
| 74 | + // @ts-ignore |
| 75 | + async runAsync(...params: TParams): Promise<TData> { |
| 76 | + this.count += 1 |
| 77 | + const currentCount = this.count |
| 78 | + const { stopNow = false, returnNow = false, ...state } = this.runPluginHandler( |
| 79 | + 'onBefore', |
| 80 | + params, |
| 81 | + ) |
| 82 | + // 是否停止请求 |
| 83 | + if (stopNow) { |
| 84 | + return new Promise(() => {}) |
| 85 | + } |
| 86 | + |
| 87 | + this.setState({ |
| 88 | + loading: true, |
| 89 | + params, |
| 90 | + ...state, |
| 91 | + }) |
| 92 | + |
| 93 | + // 是否立刻返回 |
| 94 | + if (returnNow) { |
| 95 | + return Promise.resolve(state.data) |
| 96 | + } |
| 97 | + |
| 98 | + // 请求前返回 |
| 99 | + this.options.onBefore?.(params) |
| 100 | + |
| 101 | + try { |
| 102 | + // replace service 开始请求，如果含有onRequest事件名 |
| 103 | + let { servicePromise } = this.runPluginHandler('onRequest', this.serviceRef.value, params) |
| 104 | + |
| 105 | + const requestReturn = (res: any) => { |
| 106 | + // 取消了请求，count将与currentCount不一致，将发送空请求 |
| 107 | + if (currentCount !== this.count) { |
| 108 | + return new Promise(() => {}) |
| 109 | + } |
| 110 | + // 格式化数据 |
| 111 | + const formattedResult = this.options.formatResult ? this.options.formatResult(res) : res |
| 112 | + |
| 113 | + this.setState({ |
| 114 | + data: formattedResult, |
| 115 | + error: undefined, |
| 116 | + loading: false, |
| 117 | + }) |
| 118 | + // 请求成功 |
| 119 | + this.options.onSuccess?.(formattedResult, params) |
| 120 | + |
| 121 | + this.runPluginHandler('onSuccess', formattedResult, params) |
| 122 | + |
| 123 | + // 无论请求成功还是失败都执行 |
| 124 | + this.options.onFinally?.(params, formattedResult, undefined) |
| 125 | + |
| 126 | + if (currentCount === this.count) { |
| 127 | + this.runPluginHandler('onFinally', params, formattedResult, undefined) |
| 128 | + } |
| 129 | + |
| 130 | + return formattedResult |
| 131 | + } |
| 132 | + |
| 133 | + if (!servicePromise) { |
| 134 | + /** 自动依赖收集 */ |
| 135 | + if (!this.options.manual && this.options.refreshDeps === true) { |
| 136 | + watchEffect(async () => { |
| 137 | + if (unref(this.options.ready)) { |
| 138 | + this.setData(true, 'loading') |
| 139 | + servicePromise = this.serviceRef.value(...params) |
| 140 | + const res = await servicePromise |
| 141 | + return requestReturn(res) |
| 142 | + } |
| 143 | + }) |
| 144 | + } else { |
| 145 | + servicePromise = this.serviceRef.value(...params) |
| 146 | + } |
| 147 | + } |
| 148 | + const res = await servicePromise |
| 149 | + return requestReturn(res) |
| 150 | + } catch (error) { |
| 151 | + if (currentCount !== this.count) { |
| 152 | + return new Promise(() => {}) |
| 153 | + } |
| 154 | + |
| 155 | + this.setState({ |
| 156 | + error, |
| 157 | + loading: false, |
| 158 | + }) |
| 159 | + |
| 160 | + this.options.onError?.(error as Error, params) |
| 161 | + this.runPluginHandler('onError', error, params) |
| 162 | + |
| 163 | + // 无论请求成功还是失败都执行 |
| 164 | + this.options.onFinally?.(params, undefined, error as Error) |
| 165 | + |
| 166 | + if (currentCount === this.count) { |
| 167 | + this.runPluginHandler('onFinally', params, undefined, error) |
| 168 | + } |
| 169 | + |
| 170 | + throw error |
| 171 | + } |
| 172 | + } |
| 173 | + |
| 174 | + run(...params: TParams) { |
| 175 | + this.runAsync(...params).catch(error => { |
| 176 | + if (!this.options.onError) { |
| 177 | + console.error(error) |
| 178 | + } |
| 179 | + }) |
| 180 | + } |
| 181 | + |
| 182 | + cancel() { |
| 183 | + this.count += 1 |
| 184 | + this.setState({ |
| 185 | + loading: false, |
| 186 | + }) |
| 187 | + |
| 188 | + this.runPluginHandler('onCancel') |
| 189 | + } |
| 190 | + |
| 191 | + refresh() { |
| 192 | + this.run(...((this.state.params || []) as TParams)) |
| 193 | + } |
| 194 | + |
| 195 | + refreshAsync() { |
| 196 | + return this.runAsync(...((this.state.params || []) as TParams)) |
| 197 | + } |
| 198 | + |
| 199 | + mutate(data?: TData | ((oldData?: TData) => TData | undefined)) { |
| 200 | + let targetData: TData | undefined |
| 201 | + if (typeof data === 'function') { |
| 202 | + // @ts-ignore |
| 203 | + targetData = data?.(this.state.data) |
| 204 | + } else { |
| 205 | + targetData = data |
| 206 | + } |
| 207 | + |
| 208 | + this.runPluginHandler('onMutate', targetData) |
| 209 | + this.setState({ |
| 210 | + data: targetData, |
| 211 | + }) |
| 212 | + } |
| 213 | +} |
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