9fbb41bd4b
Co-authored-by: Rajarshee Chatterjee <rajarshee.adm@gmail.com>
668 lines
14 KiB
TypeScript
668 lines
14 KiB
TypeScript
import { fetchApi } from '@libs/fetch';
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import { Plugin } from '@/types/plugin';
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import { Filters } from '@libs/filterInputs';
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import { defaultCover } from '@libs/defaultCover';
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import { NovelStatus } from '@libs/novelStatus';
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type SeriesProject = {
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id: number;
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title: string;
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slug: string;
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};
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type SeriesListData = {
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projects: SeriesProject[];
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squareImageUrls: Record<string, string>;
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};
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type NovelChapter = {
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id: number;
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title: string;
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index: number;
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free: boolean;
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};
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type NovelDetailData = {
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project: {
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title: string;
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synopsis?: string;
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short_synopsis?: string;
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author?: string;
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genres?: string[];
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completed?: boolean;
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};
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chapters: NovelChapter[];
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coverUrl?: string;
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};
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type ChapterDetailData = {
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chapter: {
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title: string;
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content: string;
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free: boolean;
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};
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hasAccess: boolean;
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};
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class DreamyTranslationsPlugin implements Plugin.PluginBase {
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id = 'dreamyTranslations';
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name = 'Dreamy Translations';
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icon = 'src/en/dreamyTranslations/icon.png';
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site = 'https://dreamy-translations.com';
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version = '1.0.1';
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filters: Filters | undefined = undefined;
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imageRequestInit?: Plugin.ImageRequestInit | undefined = undefined;
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webStorageUtilized?: boolean;
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private headers = {
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'User-Agent':
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'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120 Safari/537.36',
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Referer: this.site,
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Accept: '*/*',
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'Accept-Language': 'en-US,en;q=0.9',
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'Cache-Control': 'no-cache',
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Pragma: 'no-cache',
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RSC: '1',
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};
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/**
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* Dreamy Translations is a Next.js application.
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*
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* Normal page requests return a loading shell, while requests
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* containing the RSC header return a React Server Component
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* Flight response containing the actual page data.
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*/
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private async fetchRsc(url: string): Promise<string> {
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const res = await fetchApi(url, {
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headers: this.headers,
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});
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return await res.text();
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}
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/**
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* Extract an object from a normal JSON RSC record.
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*/
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private extractRscObject<T>(
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rscText: string,
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marker: string,
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): T {
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const line = rscText
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.split('\n')
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.find(l => l.includes(marker));
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if (!line) {
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throw new Error(
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`Could not find "${marker}" in Dreamy Translations RSC response`,
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);
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}
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const colonIndex = line.indexOf(':');
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if (colonIndex === -1) {
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throw new Error(
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'Invalid Dreamy Translations RSC record',
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);
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}
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const jsonStr = line.slice(colonIndex + 1);
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const parsed = JSON.parse(jsonStr);
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/*
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* Next.js Flight records commonly contain the actual
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* application data at index 3.
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*/
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if (
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Array.isArray(parsed) &&
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parsed.length > 3
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) {
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return parsed[3] as T;
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}
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return parsed as T;
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}
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/**
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* Extract a streamed text record.
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*
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* RSC text records look like:
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*
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* 123:T1a,<raw text>
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*
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* The length is expressed as UTF-8 byte length, so the
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* response must be sliced by encoded bytes rather than
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* JavaScript string characters.
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*/
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private extractDeferredText(
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rscText: string,
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refId: string,
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): string {
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const escapedId = refId.replace(
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/[.*+?^${}()|[\]\\]/g,
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'\\$&',
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);
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const match = new RegExp(
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`(?:^|\\n)${escapedId}:T([0-9a-fA-F]+),`,
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).exec(rscText);
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if (!match) {
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throw new Error(
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'Could not locate chapter content in server response',
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);
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}
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const start =
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match.index + match[0].length;
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const byteLength = parseInt(
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match[1],
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16,
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);
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const rest = rscText.slice(start);
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const bytes = new TextEncoder().encode(
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rest,
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);
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return new TextDecoder().decode(
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bytes.slice(0, byteLength),
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);
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}
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/**
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* Find a streamed text record.
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*
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* This is a non-throwing version of extractDeferredText()
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* used when chapter content may already be inline.
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*/
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private findDeferredText(
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rscText: string,
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refId: string,
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): string | undefined {
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const escapedId = refId.replace(
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/[.*+?^${}()|[\]\\]/g,
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'\\$&',
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);
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const match = new RegExp(
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`(?:^|\\n)${escapedId}:T([0-9a-fA-F]+),`,
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).exec(rscText);
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if (!match) {
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return undefined;
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}
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const start =
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match.index + match[0].length;
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const byteLength = parseInt(
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match[1],
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16,
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);
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const bytes = new TextEncoder().encode(
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rscText.slice(start),
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);
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return new TextDecoder().decode(
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bytes.slice(0, byteLength),
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);
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}
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/**
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* Chapter-specific RSC extraction.
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*
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* Chapter responses are not always represented by a
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* directly JSON.parse()-able record. We therefore:
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*
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* 1. Try the normal RSC record format.
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* 2. Search for the chapter object directly.
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* 3. Parse a balanced JSON object.
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* 4. Fall back to other JSON-looking Flight records.
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*/
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private extractChapterObject(
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rscText: string,
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): ChapterDetailData {
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const lines = rscText.split('\n');
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/*
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* First attempt: normal Flight record.
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*/
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const chapterLine = lines.find(
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line =>
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line.includes('"chapter"') &&
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line.includes('"hasAccess"'),
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);
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if (chapterLine) {
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const colonIndex =
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chapterLine.indexOf(':');
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if (colonIndex !== -1) {
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const payload =
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chapterLine.slice(
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colonIndex + 1,
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);
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try {
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const parsed =
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JSON.parse(payload);
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if (
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Array.isArray(parsed) &&
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parsed.length > 3 &&
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parsed[3]
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) {
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return parsed[3] as ChapterDetailData;
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}
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if (
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parsed &&
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typeof parsed === 'object' &&
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!Array.isArray(parsed)
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) {
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return parsed as ChapterDetailData;
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}
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} catch {
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/*
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* The record isn't directly JSON.
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* Continue with the fallbacks.
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*/
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}
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}
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}
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/*
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* Second attempt: locate the chapter object
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* directly inside the Flight response.
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*/
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const marker = '"chapter":{';
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const markerIndex =
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rscText.indexOf(marker);
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if (markerIndex === -1) {
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throw new Error(
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'Could not locate chapter data in server response',
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);
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}
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let start = -1;
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for (
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let i = markerIndex;
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i >= 0;
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i--
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) {
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if (rscText[i] !== '{') {
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continue;
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}
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const candidate =
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rscText.slice(
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i,
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markerIndex + marker.length,
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);
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if (
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candidate.startsWith('{') &&
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candidate.includes('"chapter"')
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) {
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start = i;
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break;
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}
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}
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if (start === -1) {
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throw new Error(
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'Could not locate chapter object in server response',
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);
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}
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/*
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* Find the matching closing brace while
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* respecting quoted strings and escapes.
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*/
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let depth = 0;
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let inString = false;
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let escaped = false;
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for (
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let i = start;
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i < rscText.length;
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i++
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) {
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const char = rscText[i];
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if (inString) {
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if (escaped) {
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escaped = false;
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} else if (char === '\\') {
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escaped = true;
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} else if (char === '"') {
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inString = false;
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}
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continue;
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}
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if (char === '"') {
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inString = true;
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continue;
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}
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if (char === '{') {
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depth++;
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} else if (char === '}') {
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depth--;
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if (depth === 0) {
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const json =
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rscText.slice(
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start,
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i + 1,
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);
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try {
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return JSON.parse(
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json,
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) as ChapterDetailData;
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} catch {
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break;
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}
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}
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}
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}
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/*
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* Final fallback: inspect JSON-looking
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* Flight records.
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*/
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for (const line of lines) {
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const colon =
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line.indexOf(':');
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if (colon === -1) {
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continue;
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}
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const payload =
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line.slice(colon + 1);
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if (
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!payload.startsWith('[') &&
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!payload.startsWith('{')
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) {
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continue;
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}
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try {
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const parsed =
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JSON.parse(payload);
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if (Array.isArray(parsed)) {
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for (const value of parsed) {
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if (
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value &&
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typeof value === 'object' &&
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!Array.isArray(value) &&
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'chapter' in value
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) {
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return value as ChapterDetailData;
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}
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}
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}
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if (
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parsed &&
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typeof parsed === 'object' &&
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!Array.isArray(parsed) &&
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'chapter' in parsed
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) {
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return parsed as ChapterDetailData;
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}
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} catch {
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// Ignore unrelated RSC records.
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}
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}
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throw new Error(
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'Could not parse chapter data from Dreamy Translations response',
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);
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}
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/**
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* Fetch every novel from the series page.
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*/
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private async fetchAllNovels(): Promise<
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Plugin.NovelItem[]
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> {
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const rscText =
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await this.fetchRsc(
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`${this.site}/series`,
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);
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const data =
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this.extractRscObject<SeriesListData>(
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rscText,
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'"projects"',
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);
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return data.projects.map(
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project => ({
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name: project.title,
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path: `/novel/${project.slug}`,
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cover:
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data.squareImageUrls[
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String(project.id)
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] || defaultCover,
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}),
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);
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}
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async popularNovels(
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pageNo: number,
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): Promise<Plugin.NovelItem[]> {
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if (pageNo !== 1) {
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return [];
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}
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return this.fetchAllNovels();
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}
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async parseNovel(
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novelPath: string,
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): Promise<Plugin.SourceNovel> {
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const rscText =
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await this.fetchRsc(
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`${this.site}${novelPath}`,
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);
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const data =
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this.extractRscObject<NovelDetailData>(
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rscText,
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'"chapters":[',
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);
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const novel: Plugin.SourceNovel = {
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path: novelPath,
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name:
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data.project.title ||
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'Untitled',
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cover:
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data.coverUrl ||
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defaultCover,
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author:
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data.project.author,
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genres:
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(data.project.genres || [])
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.join(', '),
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summary:
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data.project.synopsis ||
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data.project.short_synopsis,
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status:
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data.project.completed
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? NovelStatus.Completed
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: NovelStatus.Ongoing,
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};
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novel.chapters =
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data.chapters.map(
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chapter => ({
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name: chapter.free
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? chapter.title
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: `🔒 ${chapter.title}`,
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path:
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`${novelPath}/chapter/${chapter.index}`,
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chapterNumber:
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chapter.index,
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}),
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);
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return novel;
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}
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async parseChapter(
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chapterPath: string,
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): Promise<string> {
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const rscText =
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await this.fetchRsc(
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`${this.site}${chapterPath}`,
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);
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const data =
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this.extractChapterObject(
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rscText,
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);
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if (!data.hasAccess) {
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throw new Error(
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'This chapter requires premium access and cannot be read here.',
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);
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}
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let content =
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data.chapter.content;
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/*
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* Chapter content may be a reference to
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* a streamed RSC text record.
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*/
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const refMatch =
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typeof content === 'string'
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? /^\$([0-9a-zA-Z]+)$/.exec(
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content,
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)
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: null;
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if (refMatch) {
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const streamed =
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this.findDeferredText(
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rscText,
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refMatch[1],
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);
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if (
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streamed !== undefined
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) {
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content = streamed;
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}
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}
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if (
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!content ||
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!content.trim()
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) {
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throw new Error(
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'Dreamy Translations returned an empty chapter',
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);
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}
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/*
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* Normalize line endings.
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*
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* IMPORTANT:
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* We intentionally do NOT HTML-escape the content.
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* Dreamy supplies actual HTML, including <img> tags.
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*/
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const normalized =
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content
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.replace(/\r\n/g, '\n')
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.replace(/\r/g, '\n')
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/*
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* Dreamy currently returns image src values
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* in this form:
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*
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* src="[https://example.com/image](https://example.com/image)"
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*
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* Convert that into:
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*
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* src="https://example.com/image"
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*/
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.replace(
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/(\bsrc\s*=\s*["'])\[([^\]]+)\]\(\2\)(["'])/gi,
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'$1$2$3',
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);
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return normalized
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.split(/\n{2,}/)
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.map(
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paragraph =>
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paragraph.trim(),
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)
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.filter(Boolean)
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.map(paragraph => {
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/*
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* Don't wrap standalone images in <p>.
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*/
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if (
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/^<img\b[^>]*\/?>$/i.test(
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paragraph,
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)
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) {
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return paragraph;
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}
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/*
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* Preserve Dreamy's HTML while
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* converting ordinary newlines to
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* reader line breaks.
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*/
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return `<p>${paragraph.replace(
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/\n/g,
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'<br>',
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)}</p>`;
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})
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.join('');
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}
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async searchNovels(
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searchTerm: string,
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pageNo: number,
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): Promise<Plugin.NovelItem[]> {
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if (pageNo !== 1) {
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return [];
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}
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const novels =
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await this.fetchAllNovels();
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const term =
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searchTerm.toLowerCase();
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return novels.filter(
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novel =>
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novel.name
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.toLowerCase()
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.includes(term),
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);
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}
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resolveUrl = (path: string) =>
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this.site + path;
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}
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export default new DreamyTranslationsPlugin();
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