admin
51 lines
2.1 KiB
TypeScript
51 lines
2.1 KiB
TypeScript
/**
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* Extract a JAV product code from a filename.
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* Handles common patterns: "SSIS-001.jpg", "[ABC] DEF-123.png", "ssis001 cover.jpg",
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* "abp-456_cover.jpeg", and pre-fixes like "FHD-MIDV-123.jpg".
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*
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* Returns the canonical "PREFIX-NUMBER" form (uppercased), or null if no match.
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*/
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// Prefix must start with a letter and may contain digits (e.g. "T28", "ABP",
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// "MIAA"). Total prefix length 2-6 alphanumerics. The numeric tail is 3-5
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// digits, with an optional single-letter suffix for variant releases —
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// "IBW-610z" (z-version / re-cut), "ABP-456a" (part-a), etc. Suffix is
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// preserved in the canonical form so e.g. IBW-610 and IBW-610Z stay
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// distinct (they're different versions of the same release).
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const CODE_RE = /\b([A-Za-z][A-Za-z0-9]{1,5})[-_ ]?(\d{3,5})([a-zA-Z])?\b/;
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const QUALITY_PREFIXES = new Set(["fhd", "hd", "sd", "uhd", "4k", "1080p", "720p", "480p", "hevc", "x265", "x264"]);
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/**
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* Canonicalise an already-known code to "PREFIX-NUMBER" with the number
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* left-padded to a minimum of 3 digits and the prefix uppercased. Inputs
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* coming from NFO `<id>` tags can arrive in any of "MIAA-291", "miaa291",
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* "MIAA-00291", etc.; we want them all to compare equal so the collision
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* detector isn't fooled by formatting drift.
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*/
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export function normalizeCode(raw: string | null | undefined): string | null {
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if (!raw) return null;
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const m = raw.trim().match(CODE_RE);
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if (!m) return null;
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const suffix = (m[3] ?? "").toUpperCase();
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return `${m[1].toUpperCase()}-${m[2].padStart(3, "0")}${suffix}`;
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}
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export function extractCode(filename: string): string | null {
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const base = filename.replace(/\.[^.]+$/, "");
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// Walk left-to-right, skipping quality prefixes that look like codes (e.g. "FHD-").
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let cursor = 0;
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while (cursor < base.length) {
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const m = base.slice(cursor).match(CODE_RE);
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if (!m) return null;
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const prefix = m[1];
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const num = m[2];
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const suffix = (m[3] ?? "").toUpperCase();
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if (QUALITY_PREFIXES.has(prefix.toLowerCase())) {
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cursor += (m.index ?? 0) + m[0].length;
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continue;
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}
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return `${prefix.toUpperCase()}-${num.padStart(3, "0")}${suffix}`;
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}
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return null;
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}
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