42 lines
2.2 KiB
JavaScript
42 lines
2.2 KiB
JavaScript
'use strict';
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const IMPORTED_FIELDS = ['title', 'altTitles', 'authors', 'status', 'year', 'tags', 'description'];
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const same = (a, b) => JSON.stringify(a) === JSON.stringify(b);
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const { normalizeWorkIdentity, sameWorkIdentity } = require('./work-identity');
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// The effective fields remain at the top of manga.json. A snapshot of the last
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// imported values lets later imports refresh unchanged fields without replacing
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// values somebody edited in the library. Legacy files have no snapshot, so their
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// existing values are conservatively treated as intentional.
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function mergeImportedMetadata(prior, imported, fallbackTitle) {
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const previous = prior['x-metadata']?.imported || {};
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const result = { ...prior };
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for (const field of IMPORTED_FIELDS) {
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if (!Object.hasOwn(imported, field)) continue;
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if (result[field] === undefined || result[field] === null || result[field] === ''
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|| (Object.hasOwn(previous, field) && same(result[field], previous[field]))) {
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result[field] = imported[field];
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}
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}
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if (!result.title) result.title = fallbackTitle;
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const oldId = prior['x-anilist']?.id;
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const newId = imported['x-anilist']?.id;
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if (oldId != null && newId != null && String(oldId) !== String(newId)) {
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throw new Error(`AniList identity conflict: existing ${oldId}, imported ${newId}; review the manga match`);
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}
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if (imported['x-anilist']) result['x-anilist'] = { ...(prior['x-anilist'] || {}), ...imported['x-anilist'] };
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const oldWorkIdentity = normalizeWorkIdentity(prior['x-work-identity']);
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const newWorkIdentity = normalizeWorkIdentity(imported['x-work-identity']);
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if (oldWorkIdentity && newWorkIdentity && !sameWorkIdentity(oldWorkIdentity, newWorkIdentity)) {
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throw new Error(`MangaCircus work identity conflict: existing ${oldWorkIdentity.kind} identity differs from imported ${newWorkIdentity.kind} identity`);
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}
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if (newWorkIdentity) result['x-work-identity'] = newWorkIdentity;
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const snapshot = { ...previous };
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for (const field of IMPORTED_FIELDS) if (Object.hasOwn(imported, field)) snapshot[field] = imported[field];
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if (Object.keys(snapshot).length) result['x-metadata'] = { ...(prior['x-metadata'] || {}), imported: snapshot };
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return result;
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}
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module.exports = { mergeImportedMetadata, IMPORTED_FIELDS };
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