|
| 1 | +import firebase from 'firebase/app'; |
| 2 | + |
| 3 | +import {get} from 'idb-keyval'; |
| 4 | + |
| 5 | +import deckStore from '../../../stores/deck.store'; |
| 6 | + |
| 7 | +import {Deck, DeckAttributes} from '../../../models/data/deck'; |
| 8 | +import {Slide} from '../../../models/data/slide'; |
| 9 | + |
| 10 | +import {FirestoreUtils} from '../../../utils/editor/firestore.utils'; |
| 11 | + |
| 12 | +interface DeckBackupData { |
| 13 | + name: string; |
| 14 | + |
| 15 | + attributes?: DeckAttributes; |
| 16 | + background?: string; |
| 17 | + header?: string; |
| 18 | + footer?: string; |
| 19 | + |
| 20 | + owner_id: string; |
| 21 | + |
| 22 | + slides?: Slide[]; |
| 23 | + |
| 24 | + api_id?: string; |
| 25 | + |
| 26 | + created_at?: firebase.firestore.Timestamp; |
| 27 | + updated_at?: firebase.firestore.Timestamp; |
| 28 | +} |
| 29 | + |
| 30 | +interface DeckBackup { |
| 31 | + id: string; |
| 32 | + data: DeckBackupData; |
| 33 | +} |
| 34 | + |
| 35 | +export class BackupOfflineService { |
| 36 | + private static instance: BackupOfflineService; |
| 37 | + |
| 38 | + static getInstance(): BackupOfflineService { |
| 39 | + if (!BackupOfflineService.instance) { |
| 40 | + BackupOfflineService.instance = new BackupOfflineService(); |
| 41 | + } |
| 42 | + return BackupOfflineService.instance; |
| 43 | + } |
| 44 | + |
| 45 | + async backup() { |
| 46 | + if (!deckStore.state.deck || !deckStore.state.deck.id || !deckStore.state.deck.data) { |
| 47 | + throw new Error('No deck found'); |
| 48 | + } |
| 49 | + |
| 50 | + const slides: Slide[] = await this.getSlides(deckStore.state.deck); |
| 51 | + |
| 52 | + // We select what we want to backup and add the slides (not their id) in these data |
| 53 | + const backupDeckData: DeckBackupData = FirestoreUtils.filterDelete(this.prepareDeckBackupData(slides), true); |
| 54 | + |
| 55 | + await this.save({ |
| 56 | + id: deckStore.state.deck.id, |
| 57 | + data: backupDeckData, |
| 58 | + }); |
| 59 | + } |
| 60 | + |
| 61 | + private prepareDeckBackupData(slides: Slide[]): DeckBackupData { |
| 62 | + return { |
| 63 | + name: deckStore.state.deck.data.name, |
| 64 | + |
| 65 | + attributes: deckStore.state.deck.data.attributes, |
| 66 | + background: deckStore.state.deck.data.background, |
| 67 | + header: deckStore.state.deck.data.header, |
| 68 | + footer: deckStore.state.deck.data.footer, |
| 69 | + |
| 70 | + owner_id: deckStore.state.deck.data.owner_id, |
| 71 | + |
| 72 | + slides, |
| 73 | + |
| 74 | + api_id: deckStore.state.deck.data.api_id, |
| 75 | + |
| 76 | + created_at: deckStore.state.deck.data.created_at, |
| 77 | + updated_at: deckStore.state.deck.data.updated_at, |
| 78 | + }; |
| 79 | + } |
| 80 | + |
| 81 | + private async getSlides(deck: Deck): Promise<Slide[]> { |
| 82 | + if (!deck.data.slides || deck.data.slides.length <= 0) { |
| 83 | + return []; |
| 84 | + } |
| 85 | + |
| 86 | + try { |
| 87 | + const promises: Promise<Slide>[] = []; |
| 88 | + |
| 89 | + for (let i: number = 0; i < deck.data.slides.length; i++) { |
| 90 | + const slideId: string = deck.data.slides[i]; |
| 91 | + |
| 92 | + promises.push(get(`/decks/${deck.id}/slides/${slideId}`)); |
| 93 | + } |
| 94 | + |
| 95 | + if (!promises || promises.length <= 0) { |
| 96 | + return []; |
| 97 | + } |
| 98 | + |
| 99 | + const slides: Slide[] = await Promise.all(promises); |
| 100 | + |
| 101 | + return slides; |
| 102 | + } catch (err) { |
| 103 | + throw new Error('Error while fetching slides'); |
| 104 | + } |
| 105 | + } |
| 106 | + |
| 107 | + private save(deck: DeckBackup): Promise<void> { |
| 108 | + if ('showSaveFilePicker' in window) { |
| 109 | + return this.exportNativeFileSystem(deck); |
| 110 | + } |
| 111 | + |
| 112 | + return this.exportDownload(deck); |
| 113 | + } |
| 114 | + |
| 115 | + private async exportNativeFileSystem(deck: DeckBackup) { |
| 116 | + const fileHandle: FileSystemFileHandle = await this.getNewFileHandle(); |
| 117 | + |
| 118 | + if (!fileHandle) { |
| 119 | + throw new Error('Cannot access filesystem'); |
| 120 | + } |
| 121 | + |
| 122 | + await this.writeFile(fileHandle, JSON.stringify(deck)); |
| 123 | + } |
| 124 | + |
| 125 | + private async getNewFileHandle(): Promise<FileSystemFileHandle> { |
| 126 | + const opts: SaveFilePickerOptions = { |
| 127 | + types: [ |
| 128 | + { |
| 129 | + description: 'JSON Files', |
| 130 | + accept: { |
| 131 | + 'application/json': ['.json'], |
| 132 | + }, |
| 133 | + }, |
| 134 | + ], |
| 135 | + }; |
| 136 | + |
| 137 | + return showSaveFilePicker(opts); |
| 138 | + } |
| 139 | + |
| 140 | + private async writeFile(fileHandle: FileSystemFileHandle, contents: string | BufferSource | Blob) { |
| 141 | + // Create a writer (request permission if necessary). |
| 142 | + const writer = await fileHandle.createWritable(); |
| 143 | + // Write the full length of the contents |
| 144 | + await writer.write(contents); |
| 145 | + // Close the file and write the contents to disk |
| 146 | + await writer.close(); |
| 147 | + } |
| 148 | + |
| 149 | + private async exportDownload(deck: DeckBackup) { |
| 150 | + const a: HTMLAnchorElement = document.createElement('a'); |
| 151 | + a.style.display = 'none'; |
| 152 | + document.body.appendChild(a); |
| 153 | + |
| 154 | + const blob: Blob = new Blob([JSON.stringify(deck)], {type: 'octet/stream'}); |
| 155 | + const url: string = window.URL.createObjectURL(blob); |
| 156 | + |
| 157 | + a.href = url; |
| 158 | + a.download = `${deck.data.name}.json`; |
| 159 | + |
| 160 | + a.click(); |
| 161 | + |
| 162 | + window.URL.revokeObjectURL(url); |
| 163 | + |
| 164 | + if (a && a.parentElement) { |
| 165 | + a.parentElement.removeChild(a); |
| 166 | + } |
| 167 | + } |
| 168 | +} |
0 commit comments