2
0
Fork 0

project commit

This commit is contained in:
Willem 2015-02-24 12:35:32 +01:00
parent e0e9228981
commit 5de82aafd6

403
index.js Normal file
View file

@ -0,0 +1,403 @@
var NodeFsExtra = require('fs-extra');
var NodeMinify = require('minify');
var NodeEvents = require('events');
var NodeFetch = require('fetch');
var NodeFs = require('fs');
var FULL_OPTIONS = {
downloadStartDelay: null,
downloadForce: false,
downloadOptions: {
timeout: 10000,
maxResponseLength: 10000000,
agent: 'node-ff-assets asset fetcher'
},
linkTargetSingleResult: true,
linkTarget: null,
linkSources: [],
linkMapping: [],
assetHeader: '\n/* node-ff-assets: begin */\n\n',
assetFooter: '\n/* node-ff-assets: end */\n\n',
assetSeperator: '\n/* node-ff-assets: next */\n',
}
var DEFAULT_OPTIONS = {
downloadOptions: {
timeout: 10000,
maxResponseLength: 10000000,
agent: 'node-ff-assets asset fetcher'
},
assetHeader: '\n/* node-ff-assets: begin */\n\n',
assetFooter: '\n/* node-ff-assets: end */\n\n',
assetSeperator: '\n/* node-ff-assets: next */\n',
}
function ResourceBuilder(config, readFile) {
this.config = config;
this.startTime = 0;
this.readFile = readFile || FunctionFactory.Constructor.readFile();
NodeEvents.EventEmitter.call(this);
this.run = function(callback) {
configCheckSync(this.config);
configDefaultsSync(this.config);
runBuildSafe(this, this.readFile, callback);
};
}
ResourceBuilder.prototype.__proto__ = NodeEvents.EventEmitter.prototype;
var FunctionFactory = {
Constructor: {
readFile: function() {
return function(file,callback) {
NodeFs.readFile(file, function(err, data) {
if (err) {
callback(err);
} else {
callback(null, data);
}
});
};
},
readFileMinify: function(options) {
if (options == null) {
options = {};
}
return function(file, callback) {
NodeMinify(file, options, function(err, data) {
if (err) {
callback(err);
} else {
callback(null, data);
}
});
};
},
},
Event: {
log: {
console: function(logType) {
if (logType == null) {
throw Error('no logType');
}
return function(logLevel, logMessage) {
console.log(logLevel+': node-ff-assets-'+logType+' '+logMessage);
};
},
},
result: {
objectFunction: function(object, functionName, resultKey) {
if (object == null) {
throw Error('no object');
}
if (functionName == null) {
throw Error('no functionName');
}
return function(resultValue) {
if (resultKey == null) {
object[functionName](resultValue);
} else {
object[functionName](resultKey, resultValue);
}
};
},
objectSet: function(object,resultKey) {
return FunctionFactory.Event.result.objectFunction(object,'set',resultKey);
},
objectPut: function(object,resultKey) {
return FunctionFactory.Event.result.objectFunction(object,'put',resultKey);
},
arrayPush: function(object,resultKey) {
return FunctionFactory.Event.result.objectFunction(object,'push');
},
}
}
}
function configCheckSync(config) {
if (!config) {
throw Error('no config');
}
if (!config.linkTarget) {
throw Error('no config.linkTarget');
}
if (!config.linkSources) {
throw Error('no config.linkSources');
}
if (!config.linkMapping) {
throw Error('no config.linkMapping');
}
}
function configDefaultsSync(config) {
if (config.downloadOptions == null) {
config.downloadOptions = DEFAULT_OPTIONS.downloadOptions;
}
if (config.assetHeader == null) {
config.assetHeader = DEFAULT_OPTIONS.assetHeader;
}
if (config.assetFooter == null) {
config.assetFooter = DEFAULT_OPTIONS.assetFooter;
}
if (config.assetSeperator == null) {
config.assetSeperator = DEFAULT_OPTIONS.assetSeperator;
}
}
function runBuildSafe(builder, readFile, callback) {
runBuild(builder, readFile, function(err) {
// send error
if (err) {
builder.emit('error',err);
}
// finish callback
if (callback != null) {
callback(err);
}
});
}
function runBuild(builder, readFile, callback) {
if (builder.config.downloadStartDelay) {
setTimeout(function() {
buildStart(builder, readFile, callback);
}, builder.config.downloadStartDelay);
} else {
buildStart(builder, readFile, callback);
}
}
function buildStart(builder, readFile, callback) {
builder.startTime = new Date().getTime();
builder.emit('begin');
builder.emit('log','info','build begin for: '+builder.config.linkTarget);
if (builder.config.downloadForce) {
builder.emit('log','info','build using forced downloads.');
}
var targetFile = mapLocalFileSync(builder, builder.config.linkTarget);
NodeFsExtra.ensureFile(targetFile, function (err) {
if (err) {
callback(err);
} else {
builder.emit('file-write-pre',targetFile);
NodeFsExtra.writeFile(targetFile, builder.config.assetHeader, function(err) {
if (err) {
callback(err);
} else {
buildAsset(builder, targetFile, readFile, callback);
}
});
}
});
}
function buildAsset(builder, targetFile, readFile, callback) {
var uriList = builder.config.linkSources;
var localFileList = [];
var resultUriList = [];
var downloadList = [];
for (i = 0; i < uriList.length; i++) {
var assetItem = uriList[i];
var remoteUrl = null;
var remoteForce = null;
var remoteIndex = assetItem.indexOf('@');
if (remoteIndex > 0) {
remoteUrl = assetItem.substring(remoteIndex + 1);
if (remoteUrl.indexOf('@') == 0) {
remoteUrl = assetItem.substring(remoteIndex + 2);
remoteForce = true;
}
assetItem = assetItem.substring(0,remoteIndex);
}
var localFile = mapLocalFileSync(builder, assetItem);
// override force on all files
if (remoteForce==null && builder.config.downloadForce != null) {
remoteForce = builder.config.downloadForce;
}
if (remoteUrl && (remoteForce || !NodeFs.existsSync(localFile))) {
downloadList.push({
remoteUrl: remoteUrl,
localFile: localFile
});
}
localFileList.push(localFile);
resultUriList.push(assetItem);
}
downloadList.reverse();
localFileList.reverse();
downloadFileList(builder, downloadList, function(error) {
if (error) {
callback(err);
} else {
//for(....
//if (!NodeFs.existsSync(localFile)) {
// Log.warn("illegal entry: "+localFile);
// continue;
//}
aggregateFileList(builder, targetFile, localFileList, readFile, function(err) {
if (err) {
callback(err);
} else {
buildEnd(builder, targetFile, resultUriList, callback);
}
});
}
});
}
function mapLocalFileSync(builder, linkSource) {
var uriMapping = builder.config.linkMapping;
if (uriMapping) {
uriMappingKeys = Object.keys(uriMapping);
uriMappingKeys.sort(function(a, b) {
return a.length < b.length; // longest first as we break on first hit
});
for (ii = 0; ii < uriMappingKeys.length; ii++) {
var uriKey = uriMappingKeys[ii];
var localPath = uriMapping[uriKey];
var mapIndex = linkSource.indexOf(uriKey);
if (mapIndex == 0) {
return localPath+linkSource.substring(uriKey.length);
}
}
}
return linkSource;
}
function downloadFileList(builder, downloadList, callback) {
if (downloadList.length == 0) {
callback();
return;
}
var download = downloadList.pop();
downloadFile(builder, download.remoteUrl, download.localFile, function(err) {
if (err) {
callback(err);
} else {
downloadFileList(builder, downloadList, callback);
}
});
}
function downloadFile(builder, remoteUrl, localFile, callback) {
builder.emit('file-download-pre',remoteUrl);
builder.emit('log','debug','downloadFile: '+remoteUrl);
NodeFsExtra.ensureFile(localFile, function(err) {
if (err) {
callback(err);
} else {
var stream = new NodeFetch.FetchStream(remoteUrl);
stream.on('error', function(err) {
callback(err);
});
stream.on('end', function() {
builder.emit('file-download-post',remoteUrl);
callback();
});
stream.pipe(NodeFs.createWriteStream(localFile));
}
});
}
function aggregateFileList(builder, targetFile, aggregateList, readFile, callback) {
if (aggregateList.length == 0) {
callback();
return;
}
var aggregateFile = aggregateList.pop();
builder.emit('file-read-pre',aggregateFile);
readFile(aggregateFile, function(err, data) {
if (err) {
callback(err);
} else {
builder.emit('file-read-post',aggregateFile);
builder.emit('log','debug','readFile: '+aggregateFile+' size: '+data.length);
if (aggregateList.length > 0) {
data = data + builder.config.assetSeperator;
}
NodeFs.appendFile(targetFile, data, function (err) {
if (err) {
callback(err);
} else {
aggregateFileList(builder, targetFile, aggregateList, readFile, callback);
}
});
}
});
}
function buildEnd(builder, targetFile, resultUriList, callback) {
NodeFs.appendFile(targetFile, builder.config.assetFooter, function (err) {
if (err) {
callback(err);
} else {
builder.emit('file-write-post',targetFile);
var buildTime = new Date().getTime() - builder.startTime;
var buildResultSize = +resultUriList.length;
if (builder.config.linkTargetSingleResult) {
resultUriList = [builder.config.linkTarget];
}
var targetStats = NodeFs.statSync(targetFile);
var targetSize = targetStats['size'];
builder.emit('log','debug','target size: '+targetSize);
builder.emit('log','info','build result size: '+resultUriList.length+' from: '+buildResultSize);
builder.emit('log','info','build done in: '+buildTime+' ms.');
builder.emit('result',resultUriList);
builder.emit('end');
callback();
}
});
}
function runBuilderList(builderList,callback) {
if (callback == null) {
callback = function(err) {
if(err) {
throw err; // mm
}
};
}
if (builderList.length == 0) {
callback();
return;
}
var builder = builderList.pop();
builder.run(function(err) {
if (err) {
callback(err);
} else {
runBuilderList(builderList,callback);
}
});
}
function runAll(builderList,callback) {
builderList.reverse();
runBuilderList(builderList,callback);
}
function pushLinkSourcesSync(builder, linkPrefix, fileFolder) {
NodeFs.readdirSync(fileFolder).forEach(function (file) {
if (~file.indexOf('.js') || ~file.indexOf('.css')) {
builder.linkSources.push(linkPrefix+file)
}
});
}
module.exports = {
ResourceBuilder: ResourceBuilder,
FunctionFactory: FunctionFactory,
runAll: runAll,
pushLinkSourcesSync: pushLinkSourcesSync,
}