89 lines
2.2 KiB
JavaScript
89 lines
2.2 KiB
JavaScript
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'use strict';
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var _ = require('lodash');
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var Comparison = require('./comparison.model');
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var wdiff = require('../../components/wdiff');
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var jf = require('jsonfile');
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var fs = require('fs');
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//return the comparison given an id, if it exsits
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exports.showComparison = function showComparison(req, res) {
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//generate a filename
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var filename = fnComparison(req.params.id);
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//check if that file exists
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fs.exists(filename, function (exists) {
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//if the file does not exist, return a 404
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if (!exists) return res.send(404);
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//otherwise, read the file as JSON
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jf.readFile(filename, function(err, comparison) {
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if(err) { return handleError(res, err); }
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//and return
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return res.json(comparison);
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});
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});
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}
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//return a markdown wdiff for the comparison given an id, if it exsits
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exports.wdiffMarkdownComparison = function wdiffMarkdownComparison(req, res) {
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//generate a filename
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var filename = fnComparison(req.params.id);
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//check if that file exists
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fs.exists(filename, function (exists) {
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//if the file does not exist, return a 404
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if (!exists) return res.send(404);
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//otherwise, read the file as JSON
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jf.readFile(filename, function(err, comparison) {
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if(err) { return handleError(res, err); }
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//now perform a wdiff on the result
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wdiff(comparison.a,comparison.b, true, function(err, result) {
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if (err)
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return handleError(res, err);
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_.merge(result, comparison)
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return res.json(result);
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});
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});
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});
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}
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// Creates a new comparison
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exports.create = function create(req, res) {
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var a = req.body.a;
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var b = req.body.b;
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//create the comparison
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var comparison = new Comparison(a,b);
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//look up its filename
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var filename = fnComparison(comparison._id);
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//and write it to the filesystem
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jf.writeFile(filename, comparison, function(err) {
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if(err) { return handleError(res, err); }
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//if successful, return the comparison object
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return res.json(201, comparison);
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});
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};
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function handleError(res, err) {
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console.log(err);
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return res.send(500, err);
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}
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// returns a filename for the given comparison
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function fnComparison (id) {
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return "./data/" + "comp-" + id + ".json";
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}
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