54 lines
1.6 KiB
TypeScript
54 lines
1.6 KiB
TypeScript
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import { createTwoFilesPatch } from "diff"
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import { computeLineHash } from "./hash-computation"
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export function toHashlineContent(content: string): string {
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if (!content) return content
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const lines = content.split("\n")
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const lastLine = lines[lines.length - 1]
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const hasTrailingNewline = lastLine === ""
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const contentLines = hasTrailingNewline ? lines.slice(0, -1) : lines
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const hashlined = contentLines.map((line, i) => {
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const lineNum = i + 1
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const hash = computeLineHash(lineNum, line)
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return `${lineNum}#${hash}|${line}`
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})
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return hasTrailingNewline ? hashlined.join("\n") + "\n" : hashlined.join("\n")
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}
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export function generateUnifiedDiff(oldContent: string, newContent: string, filePath: string): string {
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return createTwoFilesPatch(filePath, filePath, oldContent, newContent, undefined, undefined, { context: 3 })
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}
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export function countLineDiffs(oldContent: string, newContent: string): { additions: number; deletions: number } {
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const oldLines = oldContent.split("\n")
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const newLines = newContent.split("\n")
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const oldSet = new Map<string, number>()
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for (const line of oldLines) {
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oldSet.set(line, (oldSet.get(line) ?? 0) + 1)
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}
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const newSet = new Map<string, number>()
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for (const line of newLines) {
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newSet.set(line, (newSet.get(line) ?? 0) + 1)
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}
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let deletions = 0
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for (const [line, count] of oldSet) {
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const newCount = newSet.get(line) ?? 0
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if (count > newCount) {
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deletions += count - newCount
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}
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}
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let additions = 0
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for (const [line, count] of newSet) {
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const oldCount = oldSet.get(line) ?? 0
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if (count > oldCount) {
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additions += count - oldCount
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}
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}
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return { additions, deletions }
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}
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