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'use strict'
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var fs = require('fs')
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var path = require('path')
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var highlighter = require('..')
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var colors = require('ansicolors')
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var diffFile = path.join(__dirname, 'git-diff.txt')
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var diff = fs.readFileSync(diffFile, 'utf-8')
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// @@ is not a valid js token, so when we see it, we can be sure that we are dealing with a git or svn diff
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var diffRegex = /^@@[^@]+@@$/m
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var diffIndRegex = /^(@@[^@]+@@)(.*)$/
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var addRemRegex = /^[+-]/
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var lines = diff.split('\n')
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function isDiff(lines) {
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return !!lines
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.filter(function(line) {
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return diffRegex.test(line)
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})
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.length
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}
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diff = isDiff(lines)
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function tryHighlight(code) {
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// TODO: need to remove symbols added to get valid code
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// this should be done by getting the splits instead of the actual code from the highlighter
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// now we can remove first / last one after highlighting completed
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function tryAppending(appended, tryNext) {
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try {
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return highlighter.highlight(code + appended)
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} catch (e) {
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return tryNext(code)
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}
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}
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function tryRemoveLeadingComma(tryNext) {
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var success
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try {
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success = highlighter.highlight(code.replace(/^( +),(.+)$/, '$1 $2'))
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return success
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} catch (e) {
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return tryNext(code)
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}
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}
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function tryPlain() {
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try {
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return highlighter.highlight(code)
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} catch (e) {
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return tryCloseMustache()
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}
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}
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function tryCloseMustache() { return tryAppending('}', tryCloseParen) }
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function tryCloseParen() { return tryAppending('\\)', tryCloseMustacheParen) }
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function tryCloseMustacheParen() { return tryAppending('})', tryRemovingCommas) }
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function tryRemovingCommas() { return tryRemoveLeadingComma(giveUp) }
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function giveUp() { return code }
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return tryPlain()
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}
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function highlightDiffInd(line, matches) {
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var highlighted = colors.brightBlue(matches[1])
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var code = matches[2]
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return code ? highlighted + tryHighlight(code) : highlighted
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}
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function colorsAddRemove(c) {
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return addRemRegex.test(c) ? colors.yellow(c) : c
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}
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function highlightDiff(line) {
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var diffIndMatches = diffIndRegex.exec(line)
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return diffIndMatches
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? highlightDiffInd(line, diffIndMatches)
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: colorsAddRemove(line[0]) + tryHighlight(line.slice(1))
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}
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var highlightFn = diff ? highlightDiff : tryHighlight
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var highlightedLines = lines.map(highlightFn)
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console.log(highlightedLines.join('\n'))
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