131 lines
7.8 KiB
JavaScript
131 lines
7.8 KiB
JavaScript
/**
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* describeGroup.js — one localized sentence pair describing a people group, built ONLY from API fields.
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*
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* DRIVER BRIEF 2026-09-28 §A1.5: the packet's profile rows carry "a short GENERATED description built
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* from the API variables, localized: how lost/unreached they are, where (country), what language they
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* speak". ~20 rows per page, so it has to be short, and it has to be right in eleven languages.
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*
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* PURE. (group, locale) -> string. No refs, no map, no fetch. The strings object is the third argument
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* so a test can inject one; it defaults to the packet's own catalogue, which is what the renderer
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* already loads (usePosterPrints.js:209).
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*
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* ★ THE LEVEL IS PHRASED FROM GSEC, A NUMBER — never from EvangelicalLevel or GSECDescription, which are
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* ENGLISH PROSE the API and the CSV hand us ("2% or Greater but Less than 5%"). Interpolating either
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* leaves the widest column of every non-English packet in English, which is the leak class this repo
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* spent 2026-09-28 removing. GSEC is 0-6 and present on all 12,379 rows, so it maps to a key per level.
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*
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* ★ AND IT DOES NOT SAY "unreached" OR "frontier". The packet's funnel page already defines both
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* (packet-strings funnel_unreached "under 2% evangelical", funnel_frontier "0.1% or less"). GSEC carries
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* the 2% line — levels 0-3 are exactly "fewer than 2%", 7,307 of 12,379 rows — but NOTHING in GSEC
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* encodes 0.1%: no GSECDescription or GSECLongDescription mentions it (checked by upg100 and by me,
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* independently). Deriving "frontier" from GSEC would assert something the field does not carry, and
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* §E of the same brief has the UPG/FPG calculation open. So the wording agrees with the funnel's 2%
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* line and stops there; when E lands it is one more key, not a rewrite.
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*
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* ★ TWO SENTENCES, NOT ONE, AND THAT IS WHY THE FALLBACKS WORK. upg100 authored seven whole sentences
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* whose FIRST half is identical in all seven, deliberately, so a translator writes it once. Splitting
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* that shared half into its own key makes the saving real instead of aspirational, and it is the only
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* shape in which their own fallback rule can be expressed: drop the clause, never blank the row. Their
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* English is preserved verbatim; only the seam moved. Each key is a COMPLETE sentence — the thing rule 1
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* forbids is assembling one sentence from fragments, which is how a Hindi verb ends up in the wrong
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* place; two finished sentences in sequence carry no such risk.
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*
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* KEYS (packet-strings.json, beside funnel_*):
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* desc_where_both "The {people} live in {country} and speak {language}."
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* desc_where_country "The {people} live in {country}." — language unknown (1 row of 12,379)
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* desc_where_language "The {people} speak {language}." — country unknown
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* desc_gsec_0 … _6 the level sentence, one per GSEC value
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*/
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import { naturalLanguageLabel } from '../utils/languageLabel.js'
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const LEVELS = [0, 1, 2, 3, 4, 5, 6]
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/** The first field present, trimmed; '' when none is. Accepts both the API and normalized spellings. */
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const pick = (group, ...names) => {
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for (const n of names) {
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const v = group && group[n]
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if (v !== undefined && v !== null && String(v).trim() !== '') return String(v).trim()
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}
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return ''
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}
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const fill = (tpl, params) =>
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String(tpl).replace(/\{(\w+)\}/g, (m, k) => (params[k] !== undefined ? params[k] : m))
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/**
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* Cut at a WORD boundary and mark it. Physical width is the real budget (the profile column is ~1/5 of
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* a card in packet-render's 2x10 grid), so the caller measures and decides; this only guarantees that a
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* limit, when given, is honoured without slicing a word in half. No limit by default.
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*/
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const clip = (s, max) => {
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if (!max || s.length <= max) return s
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const cut = s.slice(0, max - 1)
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const sp = cut.lastIndexOf(' ')
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return (sp > max * 0.6 ? cut.slice(0, sp) : cut).trimEnd() + '…'
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}
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/**
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* @param {Object} group an API/normalized people-group row
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* @param {string} locale e.g. 'ar'; falls back to 'en' when the catalogue has no such block
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* @param {Object} [opts]
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* @param {Object} [opts.strings] the packet strings object ({ en: {...}, ar: {...} })
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* @param {function} [opts.countryName] (iso3, locale) => localized country name; see below for why
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* this is injected and what happens when it is not
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* @param {number} [opts.maxChars] optional hard cap, cut at a word boundary
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* @returns {string} '' when the group carries none of the three facts
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*/
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export function describeGroup(group, locale, opts = {}) {
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const strings = opts.strings || {}
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const lc = String(locale || 'en').split('-')[0].toLowerCase()
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const block = strings[lc] || strings.en || {}
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const en = strings.en || {}
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const key = (k) => block[k] || en[k] || ''
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const people = pick(group, 'name', 'Name', 'peopleName')
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// The country is resolved to the READER's language from its code — the packet fetch carries
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// country_code, and country_code_label is the API's ENGLISH name, which is a leak in a Hindi packet.
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//
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// ★ THE RESOLVER IS INJECTED RATHER THAN IMPORTED, and that is a testability decision, not a style
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// one. library/utils/countryName.js is reachable only through the Vite '@map/' alias and imports two
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// JSON files without an import attribute — both fine in a bundle, both fatal to `node internal/
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// check-describe-group.mjs`, which is the gate that proves this function right in eleven languages.
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// Importing it would make this module unloadable by its own test. So the packet renderer, which runs
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// inside Vite and can import it, passes it in: opts.countryName = (iso, locale) => string.
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//
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// ★ AND THE FALLBACK IS THE SAME LADDER countryName.js WALKS, so forgetting to inject degrades the
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// way that file already documents rather than blanking the clause: localized name → the canonical
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// English name we already show in our own tables → the alpha-3 code, so something identifiable
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// always renders. A missing injection is an English country name, never an empty row.
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const iso = pick(group, 'country_code', 'countryIso', 'ISOAlpha3', 'countryCode')
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const country = (iso && opts.countryName ? opts.countryName(iso, lc) : '')
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|| pick(group, 'country_code_label', 'country', 'CountryName', 'countryName')
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|| iso
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// A language NAME is a proper noun; it is not translated, and there is no source that would.
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//
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// ★ IT IS primary_language_LABEL, NOT primary_language. primary_language is in normalize.js's
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// NESTED_FIELDS, so the API's { value, label } is flattened to its VALUE -- an ISO 639-3 code. Reading
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// it would print "and speak abf". The label is the name. There is deliberately no fall-back to the
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// code: upg100's rule for a missing field is DROP THE CLAUSE, never blank the row, and a bare code is
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// worse for a reader than no clause at all -- so an unresolvable language falls to desc_where_country.
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//
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// ★ AND THE LABEL IS INDEX-ORDERED: the API hands us "Arabic, Shihhi" for what reads "Shihhi Arabic".
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// 725 of 12,379 rows carry one. naturalLanguageLabel un-inverts it, sharing its split with the
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// language-family legend so the two readings of the same field cannot drift apart.
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const language = naturalLanguageLabel(
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pick(group, 'primary_language_label', 'LanguageName', 'languageName'),
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)
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const whereKey = language && country ? 'desc_where_both'
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: country ? 'desc_where_country'
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: language ? 'desc_where_language' : ''
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const where = whereKey && people ? fill(key(whereKey), { people, country, language }) : ''
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// imb_gsec is the API's spelling (upg100 added it to the packet fetch); GSEC is the CSV's.
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const gsecRaw = pick(group, 'imb_gsec', 'gsec', 'GSEC')
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const gsec = gsecRaw === '' ? null : Number(gsecRaw)
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const level = LEVELS.includes(gsec) ? key(`desc_gsec_${gsec}`) : ''
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return clip([where, level].filter(Boolean).join(' ').replace(/\s+/g, ' ').trim(), opts.maxChars)
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}
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export default describeGroup
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