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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -115,3 +115,4 @@ dist | |
| .yarn/build-state.yml | ||
| .yarn/install-state.gz | ||
| .pnp.* | ||
| .idea/ | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,148 @@ | ||
| import crypto from 'crypto' | ||
| import type { DownloadItem, DownloadURLOptions, Event, WebContents } from 'electron' | ||
| import { DownloadManagerConfig, DownloadManagerItem } from './types' | ||
|
|
||
| type DoneEventFn = (_event: Event, state: 'completed' | 'cancelled' | 'interrupted') => Promise<void> | ||
| type UpdatedEventFn = (_event: Event, state: 'progressing' | 'interrupted') => Promise<void> | ||
|
|
||
| /** | ||
| * Enables download handling for a BrowserWindow. | ||
| */ | ||
| export class DownloadManager { | ||
| protected config: DownloadManagerConfig | ||
| protected downloadItems: WeakMap<DownloadItem, DownloadManagerItem> | ||
| protected listeners: WeakMap< | ||
| DownloadItem, | ||
| { | ||
| done: DoneEventFn | ||
| updated: UpdatedEventFn | ||
| } | ||
| > | ||
|
|
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| constructor(config: DownloadManagerConfig) { | ||
| this.downloadItems = new WeakMap() | ||
| this.listeners = new WeakMap() | ||
| this.config = config | ||
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| config.window.webContents.session.on('will-download', this.onWillDownload) | ||
| } | ||
|
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||
| /** | ||
| * Starts a download. If saveDialogOptions has been defined in the config, | ||
| * the saveAs dialog will show up first. | ||
| */ | ||
| download(url: string, options?: DownloadURLOptions) { | ||
| this.config.window.webContents.downloadURL(url, options) | ||
| } | ||
|
|
||
| protected onWillDownload = async ( | ||
| _event: Event, | ||
| item: DownloadItem, | ||
| // eslint-disable-next-line @typescript-eslint/no-unused-vars | ||
| _webContents: WebContents | ||
| ): Promise<void> => { | ||
| if (this.config.saveDialogOptions) { | ||
| item.setSaveDialogOptions(this.config.saveDialogOptions) | ||
| } | ||
|
|
||
| const id = this.calculateId(item) | ||
|
|
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| this.downloadItems.set(item, { | ||
| id, | ||
| percentCompleted: 0, | ||
| }) | ||
|
|
||
| if (this.config.onDownloadStarted && this.downloadItems.has(item)) { | ||
| await this.config.onDownloadStarted({ | ||
| ...this.downloadItems.get(item)!, | ||
| item, | ||
| }) | ||
| } | ||
|
|
||
| const updatedHandler = this.itemOnUpdated(item) | ||
| const doneHandler = this.itemOnDone(item) | ||
|
|
||
| this.listeners.set(item, { | ||
| done: doneHandler, | ||
| updated: updatedHandler, | ||
| }) | ||
|
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| item.on('updated', updatedHandler) | ||
| item.once('done', doneHandler) | ||
| } | ||
|
|
||
| protected itemOnUpdated = (item: DownloadItem) => { | ||
| return async (_event: Event, state: 'progressing' | 'interrupted') => { | ||
| switch (state) { | ||
| case 'progressing': { | ||
| this.updateProgress(item) | ||
| if (this.config.onDownloadProgress && this.downloadItems.has(item)) { | ||
| await this.config.onDownloadProgress({ | ||
| ...this.downloadItems.get(item)!, | ||
| item, | ||
| }) | ||
| } | ||
| break | ||
| } | ||
| case 'interrupted': { | ||
| console.log('interrupted A') | ||
| break | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| protected itemOnDone = (item: DownloadItem) => { | ||
| return async (_event: Event, state: 'completed' | 'cancelled' | 'interrupted') => { | ||
| switch (state) { | ||
| case 'completed': { | ||
| if (this.config.onDownloadCompleted && this.downloadItems.has(item)) { | ||
| await this.config.onDownloadCompleted({ | ||
| ...this.downloadItems.get(item)!, | ||
| item, | ||
| }) | ||
| } | ||
| break | ||
| } | ||
| case 'cancelled': | ||
| if (this.config.onDownloadCancelled && this.downloadItems.has(item)) { | ||
| await this.config.onDownloadCancelled({ | ||
| ...this.downloadItems.get(item)!, | ||
| item, | ||
| }) | ||
| } | ||
| break | ||
| case 'interrupted': | ||
| console.log('interrupted B') | ||
| break | ||
| } | ||
|
|
||
| this.cleanup(item) | ||
| } | ||
| } | ||
|
|
||
| protected updateProgress(item: DownloadItem): void { | ||
| const data = this.downloadItems.get(item) | ||
|
|
||
| if (data) { | ||
| data.percentCompleted = parseFloat(((item.getReceivedBytes() / item.getTotalBytes()) * 100).toFixed(2)) | ||
| } | ||
| } | ||
|
|
||
| protected calculateId(item: DownloadItem): string { | ||
| const toHash = item.getURL() + item.getETag() + item.getFilename() + item.getSavePath() | ||
|
|
||
| return crypto.createHash('sha256').update(toHash).digest('hex') | ||
| } | ||
|
|
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| protected cleanup(item: DownloadItem) { | ||
| const listeners = this.listeners.get(item) | ||
|
|
||
| if (listeners) { | ||
| item.removeListener('updated', listeners.updated) | ||
| item.removeListener('done', listeners.done) | ||
| this.listeners.delete(item) | ||
| this.downloadItems.delete(item) | ||
| } | ||
| } | ||
| } |
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