feat: adds csv loader for Dwight (#362)

* feat: lesson 10 Extra Credit by Dwight Blue

* feat: loaders module file By Dwight Blue

* Update loaders.module.ts

---------

Co-authored-by: Anthony D. Mays <[email protected]>

Author: cdbluejr

lesson_10/libraries/src/loaders/dwight_blue_loader.ts

@@ -0,0 +1,51 @@
+import csv from 'csv-parser';
+import fs from 'fs';
+import { Credit, MediaItem } from '../models/index.js';
+import { Loader } from './loader.js';
+
+export class DwightBlueLoader implements Loader {
+  getLoaderName(): string {
+    return 'dwightblue';
+  }
+
+  async loadData(): Promise<MediaItem[]> {
+    const credits = await this.loadCredits();
+    const mediaItems = await this.loadMediaItems();
+
+    for (let i = 0; i < mediaItems.length; i++) {
+      mediaItems[i].addCredit(credits[i]);
+      console.log(mediaItems[i]);
+    }
+
+    console.log(
+      `Loaded ${credits.length} credits and ${mediaItems.length} media items`,
+    );
+
+    return [...mediaItems.values()];
+  }
+
+  async loadMediaItems(): Promise<MediaItem[]> {
+    // TODO: Implement this method.
+    const mediaItem = [];
+    const readable = fs
+      .createReadStream('data/media_items.csv', 'utf-8')
+      .pipe(csv());
+    for await (const row of readable) {
+      const { id, title, type, year } = row;
+      mediaItem.push(new MediaItem(id, title, type, year, []));
+    }
+    return mediaItem;
+  }
+
+  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: mediaItemId, role, name } = row;
+      credits.push(new Credit(mediaItemId, name, role));
+    }
+    return credits;
+  }
+}

lesson_10/libraries/src/loaders/loaders.module.ts

@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common';
 import { AngelicaCastilloLoader } from './angelica_castillo_loader.js';
 import { AnthonyMaysLoader } from './anthony_mays_loader.js';
+import { DwightBlueLoader } from './dwight_blue_loader.js';
 import { JamesCapparellLoader } from './james_capparell_loader.js';
 import { NileJacksonLoader } from './nile_jackson_loader.js';
 import { XavierCruzLoader } from './xavier_cruz_loader.js';
@@ -11,6 +12,7 @@ export const Loaders = Symbol.for('Loaders');
 const LOADER_PROVIDERS = [
   AnthonyMaysLoader,
   AngelicaCastilloLoader,
+  DwightBlueLoader,
   JamesCapparellLoader,
   NileJacksonLoader,
   XavierCruzLoader,