wehub-resource-sync
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72 lines
2.7 KiB
JavaScript
72 lines
2.7 KiB
JavaScript
// oeis sequence — full detail for a single OEIS sequence (A-number).
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//
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// OEIS' search endpoint, when given `q=id:Annnnnn`, returns one full record
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// with all sub-fields populated. We surface formula / xref / reference counts
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// instead of dumping the full graph.
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import { cli, Strategy } from '@jackwener/opencli/registry';
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import { EmptyResultError } from '@jackwener/opencli/errors';
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import { OEIS_BASE, formatId, oeisFetch, previewTerms, requireSequenceId } from './utils.js';
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function asArray(value) {
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return Array.isArray(value) ? value : [];
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}
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cli({
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site: 'oeis',
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name: 'sequence',
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access: 'read',
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description: 'Full OEIS sequence detail by A-number (terms, name, keywords, formula counts)',
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domain: 'oeis.org',
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strategy: Strategy.PUBLIC,
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browser: false,
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args: [
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{ name: 'id', positional: true, required: true, help: 'OEIS sequence id (e.g. "A000045" for Fibonacci)' },
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],
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columns: [
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'id',
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'name',
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'keywords',
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'preview',
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'termCount',
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'offset',
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'author',
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'created',
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'revision',
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'commentCount',
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'formulaCount',
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'referenceCount',
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'xrefCount',
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'linkCount',
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'url',
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],
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func: async (args) => {
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const id = requireSequenceId(args.id);
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const url = `${OEIS_BASE}/search?q=id:${encodeURIComponent(id)}&fmt=json`;
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const body = await oeisFetch(url, 'oeis sequence');
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const list = Array.isArray(body) ? body : [];
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if (!list.length) {
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throw new EmptyResultError('oeis sequence', `OEIS sequence "${id}" not found.`);
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}
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const r = list[0];
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const data = typeof r?.data === 'string' ? r.data : '';
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const termCount = data ? data.split(',').filter(Boolean).length : 0;
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return [{
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id: formatId(r?.number) ?? id,
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name: typeof r?.name === 'string' ? r.name : null,
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keywords: typeof r?.keyword === 'string' ? r.keyword : null,
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preview: previewTerms(data),
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termCount,
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offset: typeof r?.offset === 'string' ? r.offset : null,
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author: typeof r?.author === 'string' ? r.author : null,
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created: typeof r?.created === 'string' ? r.created : null,
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revision: typeof r?.revision === 'number' ? r.revision : null,
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commentCount: asArray(r?.comment).length,
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formulaCount: asArray(r?.formula).length,
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referenceCount: asArray(r?.reference).length,
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xrefCount: asArray(r?.xref).length,
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linkCount: asArray(r?.link).length,
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url: `${OEIS_BASE}/${formatId(r?.number) ?? id}`,
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}];
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},
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});
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