/**
* Copyright 2013, 2015 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var fs = require('fs');
var fspath = require('path');
var when = require('when');
var redApp = null;
var storage;
var log;
var needsPermission = require("./auth").needsPermission;
function createLibrary(type) {
if (redApp) {
redApp.get(new RegExp("/library/"+type+"($|\/(.*))"),needsPermission("library.read"),function(req,res) {
var path = req.params[1]||"";
storage.getLibraryEntry(type,path).then(function(result) {
log.audit({event: "library.get",type:type},req);
if (typeof result === "string") {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.write(result);
res.end();
} else {
res.json(result);
}
}).otherwise(function(err) {
if (err) {
log.warn(log._("api.library.error-load-entry",{path:path,message:err.toString()}));
if (err.code === 'forbidden') {
log.audit({event: "library.get",type:type,error:"forbidden"},req);
res.status(403).end();
return;
}
}
log.audit({event: "library.get",type:type,error:"not_found"},req);
res.status(404).end();
});
});
redApp.post(new RegExp("/library/"+type+"\/(.*)"),needsPermission("library.write"),function(req,res) {
var path = req.params[0];
var meta = req.body;
var text = meta.text;
delete meta.text;
storage.saveLibraryEntry(type,path,meta,text).then(function() {
log.audit({event: "library.set",type:type},req);
res.status(204).end();
}).otherwise(function(err) {
log.warn(log._("api.library.error-save-entry",{path:path,message:err.toString()}));
if (err.code === 'forbidden') {
log.audit({event: "library.set",type:type,error:"forbidden"},req);
res.status(403).end();
return;
}
log.audit({event: "library.set",type:type,error:"unexpected_error",message:err.toString()},req);
res.status(500).json({error:"unexpected_error", message:err.toString()});
});
});
}
}
var exampleRoots = {};
var exampleFlows = {d:{}};
var exampleCount = 0;
function getFlowsFromPath(path) {
return when.promise(function(resolve,reject) {
var result = {};
fs.readdir(path,function(err,files) {
var promises = [];
var validFiles = [];
files.forEach(function(file) {
var fullPath = fspath.join(path,file);
var stats = fs.lstatSync(fullPath);
if (stats.isDirectory()) {
validFiles.push(file);
promises.push(getFlowsFromPath(fullPath));
} else if (/\.json$/.test(file)){
validFiles.push(file);
exampleCount++;
promises.push(when.resolve(file.split(".")[0]))
}
})
var i=0;
when.all(promises).then(function(results) {
results.forEach(function(r) {
if (typeof r === 'string') {
result.f = result.f||[];
result.f.push(r);
} else {
result.d = result.d||{};
result.d[validFiles[i]] = r;
}
i++;
})
resolve(result);
})
});
})
}
function addNodeExamplesDir(module) {
exampleRoots[module.name] = module.path;
getFlowsFromPath(module.path).then(function(result) {
exampleFlows.d[module.name] = result;
});
}
function removeNodeExamplesDir(module) {
delete exampleRoots[module];
delete exampleFlows.d[module];
}
module.exports = {
init: function(app,runtime) {
redApp = app;
log = runtime.log;
storage = runtime.storage;
// TODO: this allows init to be called multiple times without
// registering multiple instances of the listener.
// It isn't.... ideal.
runtime.events.removeListener("node-examples-dir",addNodeExamplesDir);
runtime.events.on("node-examples-dir",addNodeExamplesDir);
runtime.events.removeListener("node-module-uninstalled",removeNodeExamplesDir);
runtime.events.on("node-module-uninstalled",removeNodeExamplesDir);
},
register: createLibrary,
getAll: function(req,res) {
storage.getAllFlows().then(function(flows) {
log.audit({event: "library.get.all",type:"flow"},req);
if (exampleCount > 0) {
flows.d = flows.d||{};
flows.d._examples_ = exampleFlows;
}
res.json(flows);
});
},
get: function(req,res) {
if (req.params[0].indexOf("_examples_/") === 0) {
var m = /^_examples_\/([^\/]+)\/(.*)$/.exec(req.params[0]);
if (m) {
var module = m[1];
var path = m[2]+".json";
if (exampleRoots[module]) {
var fullPath = fspath.join(exampleRoots[module],path);
try {
fs.statSync(fullPath);
log.audit({event: "library.get",type:"flow",path:req.params[0]},req);
return res.sendFile(fullPath,{
headers:{
'Content-Type': 'application/json'
}
})
} catch(err) {
console.log(err);
}
}
}
// IF we get here, we didn't find the file
log.audit({event: "library.get",type:"flow",path:req.params[0],error:"not_found"},req);
return res.status(404).end();
} else {
storage.getFlow(req.params[0]).then(function(data) {
// data is already a JSON string
log.audit({event: "library.get",type:"flow",path:req.params[0]},req);
res.set('Content-Type', 'application/json');
res.send(data);
}).otherwise(function(err) {
if (err) {
log.warn(log._("api.library.error-load-flow",{path:req.params[0],message:err.toString()}));
if (err.code === 'forbidden') {
log.audit({event: "library.get",type:"flow",path:req.params[0],error:"forbidden"},req);
res.status(403).end();
return;
}
}
log.audit({event: "library.get",type:"flow",path:req.params[0],error:"not_found"},req);
res.status(404).end();
});
}
},
post: function(req,res) {
// if (req.params[0].indexOf("_examples_/") === 0) {
// log.warn(log._("api.library.error-save-flow",{path:req.params[0],message:"forbidden"}));
// log.audit({event: "library.set",type:"flow",path:req.params[0],error:"forbidden"},req);
// return res.status(403).send({error:"unexpected_error", message:"forbidden"});
// }
var flow = JSON.stringify(req.body);
storage.saveFlow(req.params[0],flow).then(function() {
log.audit({event: "library.set",type:"flow",path:req.params[0]},req);
res.status(204).end();
}).otherwise(function(err) {
log.warn(log._("api.library.error-save-flow",{path:req.params[0],message:err.toString()}));
if (err.code === 'forbidden') {
log.audit({event: "library.set",type:"flow",path:req.params[0],error:"forbidden"},req);
res.status(403).end();
return;
}
log.audit({event: "library.set",type:"flow",path:req.params[0],error:"unexpected_error",message:err.toString()},req);
res.status(500).send({error:"unexpected_error", message:err.toString()});
});
}
}