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Lesson 10 #364
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Lesson 10 #364
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,60 @@ | ||
import csv from 'csv-parser'; | ||
import fs from 'fs'; | ||
import { Credit, MediaItem } from '../models/index.js'; | ||
import { Loader } from './loader.js'; | ||
|
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export class MontezBLoader implements Loader { | ||
getLoaderName(): string { | ||
return 'montezb'; | ||
} | ||
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async loadData(): Promise<MediaItem[]> { | ||
const credits = await this.loadCredits(); | ||
const mediaItems = await this.loadMediaItems(); | ||
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const mediaMap = new Map<string, MediaItem>(); | ||
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for (const media of mediaItems) { | ||
mediaMap.set(media.getId(), media); | ||
} | ||
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for (const credit of credits) { | ||
const mediaItem = mediaMap.get(credit.getMediaItemId()); | ||
if (mediaItem) { | ||
mediaItem.addCredit(credit); | ||
} | ||
} | ||
|
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console.log( | ||
`Loaded ${credits.length} credits and ${mediaItems.length} media items`, | ||
); | ||
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return Array.from(mediaMap.values()); | ||
} | ||
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async loadMediaItems(): Promise<MediaItem[]> { | ||
// TODO: Implement this method. | ||
const mediaItems = []; | ||
const readable = fs | ||
.createReadStream('data/media_items.csv', 'utf-8') | ||
.pipe(csv()); | ||
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for await (const row of readable) { | ||
const { id, title, type, year } = row; | ||
mediaItems.push(new MediaItem( id, title, type, year, [])); | ||
} | ||
return mediaItems; | ||
} | ||
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async loadCredits(): Promise<Credit[]> { | ||
const credits = []; | ||
const readable = fs | ||
.createReadStream('data/credits.csv', 'utf-8') | ||
.pipe(csv()); | ||
for await (const row of readable) { | ||
const { media_item_id, role, name } = row; | ||
credits.push(new Credit(media_item_id, name, role)); | ||
} | ||
return credits; | ||
} | ||
} |
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