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* @module scripts/validators/article/rules/banned-phrases
* @description Banned-phrase scanner — load + cache the canonical
* `political-style-guide.json` list and scan article text
* for case-insensitive literal substring matches.
*
* Rule census: extracted from
* `scripts/validate-article.ts` lines 315–386 (cache,
* `loadBannedPhrases`, `resetBannedPhrasesCache`,
* `scanBannedPhrases`). Logic is byte-identical to the
* original; the module-scope cache + reset API are
* preserved exactly because tests in
* `tests/validate-article.test.ts` depend on the behaviour.
*
* @author Hack23 AB
* @license Apache-2.0
*/
import { existsSync, readFileSync } from 'node:fs';
import { join } from 'node:path';
import { REPO_ROOT } from '../types.js';
let _bannedPhrasesCache: string[] | null = null;
let _bannedPhrasesCacheLoaded = false;
/**
* Load banned phrases from the canonical JSON file. Returns the flat
* array of literal substrings. Caches after first load.
* Returns `null` when the canonical file is missing or malformed so
* callers can emit an explicit violation rather than silently skipping.
*/
export function loadBannedPhrases(repoRoot: string = REPO_ROOT): string[] | null {
if (_bannedPhrasesCacheLoaded) return _bannedPhrasesCache;
const jsonPath = join(repoRoot, 'analysis', 'methodologies', 'political-style-guide.json');
if (!existsSync(jsonPath)) {
_bannedPhrasesCacheLoaded = true;
_bannedPhrasesCache = null;
return null;
}
try {
const data = JSON.parse(readFileSync(jsonPath, 'utf8')) as { allPhrases?: unknown };
if (!Array.isArray(data.allPhrases) || data.allPhrases.length === 0) {
_bannedPhrasesCache = null;
} else {
const seen = new Set<string>();
const phrases: string[] = [];
for (const item of data.allPhrases) {
if (typeof item !== 'string') continue;
const trimmed = item.trim();
if (trimmed.length === 0) continue;
const key = trimmed.toLowerCase();
if (seen.has(key)) continue;
seen.add(key);
phrases.push(trimmed);
}
_bannedPhrasesCache = phrases.length > 0 ? phrases : null;
}
} catch {
_bannedPhrasesCache = null;
}
_bannedPhrasesCacheLoaded = true;
return _bannedPhrasesCache;
}
/** Reset cache (for testing). */
export function resetBannedPhrasesCache(): void {
_bannedPhrasesCache = null;
_bannedPhrasesCacheLoaded = false;
}
/**
* Scan text for banned phrases (case-insensitive literal substring match).
* Returns the list of hits with the matched phrase and a short context snippet.
*/
export function scanBannedPhrases(
text: string,
bannedPhrases: string[],
): Array<{ phrase: string; context: string }> {
const hits: Array<{ phrase: string; context: string }> = [];
const lower = text.toLowerCase();
for (const phrase of bannedPhrases) {
const trimmed = phrase.trim();
if (trimmed.length === 0) continue;
const needle = trimmed.toLowerCase();
let idx = lower.indexOf(needle);
while (idx !== -1) {
const start = Math.max(0, idx - 20);
const end = Math.min(text.length, idx + trimmed.length + 20);
const context = text.slice(start, end).replace(/\n/g, ' ');
hits.push({ phrase: trimmed, context });
idx = lower.indexOf(needle, idx + needle.length);
}
}
return hits;
}
import type { ArticleViolation } from '../types.js';
/** Banned-phrase rule. Emits `missing-banned-phrase-list` when the canonical file is unloadable. */
export function checkBannedPhrases(rel: string, text: string): ArticleViolation[] {
const out: ArticleViolation[] = [];
const bannedPhrases = loadBannedPhrases();
Iif (bannedPhrases === null) {
out.push({
file: rel,
code: 'missing-banned-phrase-list',
message: `Canonical banned-phrase file (analysis/methodologies/political-style-guide.json) is missing or malformed — editorial QA check cannot run. Ensure the file exists and contains a valid "allPhrases" array.`,
});
return out;
}
Iif (bannedPhrases.length === 0) return out;
const hits = scanBannedPhrases(text, bannedPhrases);
if (hits.length > 0) {
const sample = hits.slice(0, 3).map((h) => `"${h.phrase}"`).join(', ');
out.push({
file: rel,
code: 'banned-phrase-detected',
message: `Article contains ${hits.length} banned phrase(s) (${sample}${hits.length > 3 ? ', …' : ''}). Rewrite using evidence-anchored alternatives per political-style-guide.json (human-readable companion: political-style-guide.md).`,
});
}
return out;
}
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