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Save language metadata on build to avoid readdirs later

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This commit is contained in:
Peter Jaszkowiak
2017-04-20 00:16:06 -06:00
parent 1028327f0a
commit 413bb4736c
2 changed files with 78 additions and 40 deletions
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99
src/languages.js
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@@ -4,7 +4,7 @@ var fs = require('fs');
var path = require('path');
var async = require('async');
var Languages = {};
var Languages = module.exports;
var languagesPath = path.join(__dirname, '../build/public/language');
Languages.init = function (next) {
@@ -27,10 +27,13 @@ Languages.get = function (language, namespace, callback) {
});
};
Languages.list = function (callback) {
var languages = [];
var codeCache = null;
Languages.listCodes = function (callback) {
if (codeCache && codeCache.length) {
return callback(null, codeCache);
}
fs.readdir(languagesPath, function (err, files) {
fs.readFile(path.join(languagesPath, 'metadata.json'), function (err, buffer) {
if (err && err.code === 'ENOENT') {
return callback(null, []);
}
@@ -38,43 +41,59 @@ Languages.list = function (callback) {
return callback(err);
}
async.each(files, function (folder, next) {
fs.stat(path.join(languagesPath, folder), function (err, stat) {
if (err) {
return next(err);
}
var parsed;
try {
parsed = JSON.parse(buffer.toString());
} catch (e) {
return callback(e);
}
if (!stat.isDirectory()) {
return next();
}
var configPath = path.join(languagesPath, folder, 'language.json');
fs.readFile(configPath, function (err, buffer) {
if (err && err.code !== 'ENOENT') {
return next(err);
}
if (buffer) {
var lang = JSON.parse(buffer.toString());
if (lang.name && lang.code && lang.dir) {
languages.push(lang);
}
}
next();
});
});
}, function (err) {
if (err) {
return callback(err);
}
// Sort alphabetically
languages = languages.sort(function (a, b) {
return a.code > b.code ? 1 : -1;
});
callback(err, languages);
});
var langs = parsed.languages;
codeCache = langs;
callback(null, langs);
});
};
module.exports = Languages;
var listCache = null;
Languages.list = function (callback) {
if (listCache && listCache.length) {
return callback(null, listCache);
}
Languages.listCodes(function (err, codes) {
if (err) {
return callback(err);
}
async.map(codes, function (folder, next) {
var configPath = path.join(languagesPath, folder, 'language.json');
fs.readFile(configPath, function (err, buffer) {
if (err && err.code === 'ENOENT') {
return next();
}
if (err) {
return next(err);
}
try {
var lang = JSON.parse(buffer.toString());
next(null, lang);
} catch (e) {
next(e);
}
});
}, function (err, languages) {
if (err) {
return callback(err);
}
// filter out invalid ones
languages = languages.filter(function (lang) {
return lang.code && lang.name && lang.dir;
});
listCache = languages;
callback(null, languages);
});
});
};