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flows.js
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/**
* Copyright JS Foundation and other contributors, http://js.foundation
*
* 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.
**/
/**
* @namespace RED.flows
*/
/**
* @typedef Flows
* @type {object}
* @property {string} rev - the flow revision identifier
* @property {Array} flows - the flow configuration, an array of node configuration objects
*/
/**
* @typedef Flow
* @type {object}
* @property {string} id - the flow identifier
* @property {string} label - a label for the flow
* @property {Array} nodes - an array of node configuration objects
*/
var runtime;
var api = module.exports = {
init: function(_runtime) {
runtime = _runtime;
},
/**
* Gets the current flow configuration
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @return {Promise<Flows>} - the active flow configuration
* @memberof RED.flows
*/
getFlows: function(opts) {
return new Promise(function(resolve,reject) {
runtime.log.audit({event: "flows.get"}/*,req*/);
return resolve(runtime.nodes.getFlows());
});
},
/**
* Sets the current flow configuration
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @return {Promise<Flows>} - the active flow configuration
* @memberof RED.flows
*/
setFlows: function(opts) {
return new Promise(function(resolve,reject) {
var flows = opts.flows;
var deploymentType = opts.deploymentType||"full";
runtime.log.audit({event: "flows.set",type:deploymentType}/*,req*/);
var apiPromise;
if (deploymentType === 'reload') {
apiPromise = runtime.nodes.loadFlows();
} else {
if (flows.hasOwnProperty('rev')) {
var currentVersion = runtime.nodes.getFlows().rev;
if (currentVersion !== flows.rev) {
var err;
err = new Error();
err.code = "version_mismatch";
err.status = 409;
//TODO: log warning
return reject(err);
}
}
apiPromise = runtime.nodes.setFlows(flows.flows,deploymentType);
}
apiPromise.then(function(flowId) {
return resolve({rev:flowId});
}).catch(function(err) {
runtime.log.warn(runtime.log._("api.flows.error-"+(deploymentType === 'reload'?'reload':'save'),{message:err.message}));
runtime.log.warn(err.stack);
return reject(err);
});
});
},
/**
* Adds a flow configuration
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @param {Object} opts.flow - the flow to add
* @return {Promise<String>} - the id of the added flow
* @memberof RED.flows
*/
addFlow: function(opts) {
return new Promise(function(resolve,reject) {
var flow = opts.flow;
runtime.nodes.addFlow(flow).then(function(id) {
runtime.log.audit({event: "flow.add",id:id});
return resolve(id);
}).catch(function(err) {
runtime.log.audit({event: "flow.add",error:err.code||"unexpected_error",message:err.toString()});
err.status = 400;
return reject(err);
})
})
},
/**
* Gets an individual flow configuration
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @param {Object} opts.id - the id of the flow to retrieve
* @return {Promise<Flow>} - the active flow configuration
* @memberof RED.flows
*/
getFlow: function(opts) {
return new Promise(function (resolve,reject) {
var flow = runtime.nodes.getFlow(opts.id);
if (flow) {
runtime.log.audit({event: "flow.get",id:opts.id});
return resolve(flow);
} else {
runtime.log.audit({event: "flow.get",id:opts.id,error:"not_found"});
var err = new Error();
err.code = "not_found";
err.status = 404;
return reject(err);
}
})
},
/**
* Updates an existing flow configuration
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @param {Object} opts.id - the id of the flow to update
* @param {Object} opts.flow - the flow configuration
* @return {Promise<String>} - the id of the updated flow
* @memberof RED.flows
*/
updateFlow: function(opts) {
return new Promise(function (resolve,reject) {
var flow = opts.flow;
var id = opts.id;
try {
runtime.nodes.updateFlow(id,flow).then(function() {
runtime.log.audit({event: "flow.update",id:id});
return resolve(id);
}).catch(function(err) {
runtime.log.audit({event: "flow.update",error:err.code||"unexpected_error",message:err.toString()});
err.status = 400;
return reject(err);
})
} catch(err) {
if (err.code === 404) {
runtime.log.audit({event: "flow.update",id:id,error:"not_found"});
// TODO: this swap around of .code and .status isn't ideal
err.status = 404;
err.code = "not_found";
return reject(err);
} else {
runtime.log.audit({event: "flow.update",error:err.code||"unexpected_error",message:err.toString()});
err.status = 400;
return reject(err);
}
}
});
},
/**
* Deletes a flow
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @param {Object} opts.id - the id of the flow to delete
* @return {Promise} - resolves if successful
* @memberof RED.flows
*/
deleteFlow: function(opts) {
return new Promise(function (resolve,reject) {
var id = opts.id;
try {
runtime.nodes.removeFlow(id).then(function() {
runtime.log.audit({event: "flow.remove",id:id});
return resolve();
}).catch(function(err) {
runtime.log.audit({event: "flow.remove",id:id,error:err.code||"unexpected_error",message:err.toString()});
err.status = 400;
return reject(err);
});
} catch(err) {
if (err.code === 404) {
runtime.log.audit({event: "flow.remove",id:id,error:"not_found"});
// TODO: this swap around of .code and .status isn't ideal
err.status = 404;
err.code = "not_found";
return reject(err);
} else {
runtime.log.audit({event: "flow.remove",id:id,error:err.code||"unexpected_error",message:err.toString()});
err.status = 400;
return reject(err);
}
}
});
},
/**
* Gets the safe credentials for a node
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @param {String} opts.type - the node type to return the credential information for
* @param {String} opts.id - the node id
* @return {Promise<Object>} - the safe credentials
* @memberof RED.flows
*/
getNodeCredentials: function(opts) {
return new Promise(function(resolve,reject) {
runtime.log.audit({event: "credentials.get",type:opts.type,id:opts.id});
var credentials = runtime.nodes.getCredentials(opts.id);
if (!credentials) {
return resolve({});
}
var definition = runtime.nodes.getCredentialDefinition(opts.type) || {};
var sendCredentials = {};
for (var cred in definition) {
if (definition.hasOwnProperty(cred)) {
if (definition[cred].type == "password") {
var key = 'has_' + cred;
sendCredentials[key] = credentials[cred] != null && credentials[cred] !== '';
continue;
}
sendCredentials[cred] = credentials[cred] || '';
}
}
resolve(sendCredentials);
})
}
}