60 lines
2.0 KiB
JavaScript
60 lines
2.0 KiB
JavaScript
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const Diffs = (() => {
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"use strict";
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const COLLAPSE = 400;
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const QUOTE_LIMIT = 2000;
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const HUNK = /^@@ -(\d+)(?:,\d+)? \+(\d+)(?:,\d+)? @@/;
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const KINDS = {"+": "add", "-": "del", " ": "ctx"};
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function rows(patch) {
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const found = [];
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let [old, now] = [0, 0];
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String(patch).split("\n").forEach((text, index) => {
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const line = index + 1;
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const hunk = HUNK.exec(text);
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if (hunk) {
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[old, now] = [Number(hunk[1]), Number(hunk[2])];
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found.push({kind: "hunk", line, old: "", new: "", text});
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return;
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}
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const kind = KINDS[text[0]];
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if (!kind) {
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return;
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}
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const row = {kind, line, old: kind === "add" ? "" : old, new: kind === "del" ? "" : now, text: text.slice(1)};
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old += kind === "add" ? 0 : 1;
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now += kind === "del" ? 0 : 1;
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found.push(row);
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});
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return found;
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}
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const collapsed = (file) => file.additions + file.deletions > COLLAPSE;
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function span(numbers) {
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const known = numbers.filter((value) => Number.isInteger(value) && value > 0);
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return known.length ? [Math.min(...known), Math.max(...known)] : null;
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}
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function lineSpan(text, quote) {
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const full = String(text);
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const at = full.indexOf(quote);
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if (!quote || at < 0) {
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return [1, full.split("\n").length];
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}
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const from = full.slice(0, at).split("\n").length;
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return [from, from + quote.split("\n").length - 1];
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}
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function quoted(text) {
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const clean = String(text).trim();
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return clean.length > QUOTE_LIMIT ? `${clean.slice(0, QUOTE_LIMIT)}…` : clean;
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}
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const feedback = (ref, path, from, to, quote, words) => `Feedback on ${ref} ${path}:${from}-${to}: "${quoted(quote)}" ${String(words).trim()}`;
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const feedbackOf = (messages, ref) => messages.filter((message) => String(message.text).startsWith(`Feedback on ${ref} `));
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return {COLLAPSE, QUOTE_LIMIT, rows, collapsed, span, lineSpan, quoted, feedback, feedbackOf};
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})();
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if (typeof module === "object" && module.exports) {
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module.exports = Diffs;
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}
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