1 files changed, 156 insertions, 0 deletions
diff --git a/frontend/src/lib/Scraper.ts b/frontend/src/lib/Scraper.ts
new file mode 100644
index 0000000..4baf370
--- /dev/null
+++ b/frontend/src/lib/Scraper.ts
@@ -0,0 +1,156 @@
+import {
+	Category,
+	Censorship,
+	Direction,
+	Language,
+	Layout,
+	OnMissing,
+	Rating,
+	type FullComicFragment,
+	type ScrapedComic,
+	type UpsertComicInput,
+	type UpsertOptions
+} from '$gql/graphql';
+import {
+	CategoryLabel,
+	CensorshipLabel,
+	DirectionLabel,
+	LanguageLabel,
+	LayoutLabel,
+	RatingLabel
+} from '$lib/Enums';
+import { getContext, setContext } from 'svelte';
+import { writable, type Writable } from 'svelte/store';
+
+interface ScraperContext {
+	scraper: string;
+	warnings: string[];
+	selector?: ScrapedComicSelector;
+}
+
+export function initScraperContext() {
+	return setContext<Writable<ScraperContext>>('scraper', writable({ scraper: '', warnings: [] }));
+}
+
+export function getScraperContext() {
+	return getContext<Writable<ScraperContext>>('scraper');
+}
+
+export class Selector<T extends string> {
+	keep = true;
+	value: T;
+	display: string | undefined;
+
+	constructor(value: T, display?: string) {
+		this.value = value;
+		this.display = display;
+	}
+
+	toString() {
+		return this.display ?? this.value;
+	}
+
+	static from<T extends string>(
+		scraped: T | undefined | null,
+		have: string | undefined | null,
+		label?: Record<string, string>
+	) {
+		if (scraped && have !== scraped) {
+			return new Selector(scraped, label ? label[scraped] : undefined);
+		}
+		return undefined;
+	}
+
+	static fromList(scraped: string[], have: { name: string }[]) {
+		const haves = new Set(have.map((i) => i.name));
+
+		return scraped.filter((i) => !haves.has(i)).map((i) => new Selector(i));
+	}
+}
+
+function keepItem<T extends string>(selector?: Selector<T>): T | undefined | null {
+	if (selector?.keep) {
+		return selector.value;
+	}
+	return undefined;
+}
+
+function keepList<T extends string>(
+	selectorList: Selector<T>[],
+	onMissing: OnMissing
+): { names: T[]; options: UpsertOptions } {
+	return {
+		names: selectorList.filter((v) => v.keep).map((v) => v.value),
+		options: { onMissing }
+	};
+}
+
+export class ScrapedComicSelector {
+	title?: Selector<string>;
+	originalTitle?: Selector<string>;
+	url?: Selector<string>;
+	date?: Selector<string>;
+	category?: Selector<Category>;
+	censorship?: Selector<Censorship>;
+	rating?: Selector<Rating>;
+	language?: Selector<Language>;
+	direction?: Selector<Direction>;
+	layout?: Selector<Layout>;
+	artists: Selector<string>[];
+	circles: Selector<string>[];
+	characters: Selector<string>[];
+	worlds: Selector<string>[];
+	tags: Selector<string>[];
+
+	constructor(scraped: ScrapedComic, comic: FullComicFragment) {
+		this.title = Selector.from(scraped.title, comic.title);
+		this.originalTitle = Selector.from(scraped.originalTitle, comic.originalTitle);
+		this.url = Selector.from(scraped.url, comic.url);
+		this.date = Selector.from(scraped.date, comic.date);
+		this.category = Selector.from(scraped.category, comic.category, CategoryLabel);
+		this.censorship = Selector.from(scraped.censorship, comic.censorship, CensorshipLabel);
+		this.rating = Selector.from(scraped.rating, comic.rating, RatingLabel);
+		this.language = Selector.from(scraped.language, comic.language, LanguageLabel);
+		this.direction = Selector.from(scraped.direction, comic.direction, DirectionLabel);
+		this.layout = Selector.from(scraped.layout, comic.layout, LayoutLabel);
+
+		this.artists = Selector.fromList(scraped.artists, comic.artists);
+		this.circles = Selector.fromList(scraped.circles, comic.circles);
+		this.characters = Selector.fromList(scraped.characters, comic.characters);
+		this.tags = Selector.fromList(scraped.tags, comic.tags);
+		this.worlds = Selector.fromList(scraped.worlds, comic.worlds);
+	}
+
+	hasData() {
+		return (
+			Object.values(this).filter((i) => {
+				if (i === undefined) {
+					return false;
+				} else if (Array.isArray(i) && i.length === 0) {
+					return false;
+				}
+				return true;
+			}).length > 0
+		);
+	}
+
+	toInput(onMissing: OnMissing): UpsertComicInput {
+		return {
+			title: keepItem(this.title),
+			originalTitle: keepItem(this.originalTitle),
+			url: keepItem(this.url),
+			date: keepItem(this.date),
+			category: keepItem(this.category),
+			censorship: keepItem(this.censorship),
+			rating: keepItem(this.rating),
+			language: keepItem(this.language),
+			direction: keepItem(this.direction),
+			layout: keepItem(this.layout),
+			artists: keepList(this.artists, onMissing),
+			circles: keepList(this.circles, onMissing),
+			characters: keepList(this.characters, onMissing),
+			worlds: keepList(this.worlds, onMissing),
+			tags: keepList(this.tags, onMissing)
+		};
+	}
+}