/
context.js
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/
context.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.
**/
/**
* @mixin @node-red/runtime_context
*/
var runtime;
var util = require("@node-red/util").util;
function exportContextStore(scope,ctx, store, result, callback) {
ctx.keys(store,function(err, keys) {
if (err) {
return callback(err);
}
result[store] = {};
var c = keys.length;
if (c === 0) {
callback(null);
} else {
keys.forEach(function(key) {
ctx.get(key,store,function(err, v) {
if (err) {
return callback(err);
}
if (scope !== 'global' ||
store === runtime.nodes.listContextStores().default ||
!runtime.settings.hasOwnProperty("functionGlobalContext") ||
!runtime.settings.functionGlobalContext.hasOwnProperty(key) ||
runtime.settings.functionGlobalContext[key] !== v) {
result[store][key] = util.encodeObject({msg:v});
}
c--;
if (c === 0) {
callback(null);
}
});
});
}
});
}
var api = module.exports = {
init: function(_runtime) {
runtime = _runtime;
},
/**
* Gets the info of an individual node set
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @param {String} opts.scope - the scope of the context
* @param {String} opts.id - the id of the context
* @param {String} opts.store - the context store
* @param {String} opts.key - the context key
* @param {Object} opts.req - the request to log (optional)
* @return {Promise} - the node information
* @memberof @node-red/runtime_context
*/
getValue: function(opts) {
return new Promise(function(resolve,reject) {
var scope = opts.scope;
var id = opts.id;
var store = opts.store;
var key = opts.key;
var availableStores = runtime.nodes.listContextStores();
//{ default: 'default', stores: [ 'default', 'file' ] }
if (store && availableStores.stores.indexOf(store) === -1) {
runtime.log.audit({event: "context.get",scope:scope,id:id,store:store,key:key,error:"not_found"}, opts.req);
var err = new Error();
err.code = "not_found";
err.status = 404;
return reject(err);
}
var ctx;
if (scope === 'global') {
ctx = runtime.nodes.getContext('global');
} else if (scope === 'flow') {
ctx = runtime.nodes.getContext(id);
} else if (scope === 'node') {
var node = runtime.nodes.getNode(id);
if (node) {
ctx = node.context();
}
}
if (ctx) {
if (key) {
store = store || availableStores.default;
ctx.get(key,store,function(err, v) {
var encoded = util.encodeObject({msg:v});
if (store !== availableStores.default) {
encoded.store = store;
}
runtime.log.audit({event: "context.get",scope:scope,id:id,store:store,key:key}, opts.req);
resolve(encoded);
});
return;
} else {
var stores;
if (!store) {
stores = availableStores.stores;
} else {
stores = [store];
}
var result = {};
var c = stores.length;
var errorReported = false;
stores.forEach(function(store) {
exportContextStore(scope,ctx,store,result,function(err) {
if (err) {
// TODO: proper error reporting
if (!errorReported) {
errorReported = true;
runtime.log.audit({event: "context.get",scope:scope,id:id,store:store,key:key,error:"unexpected_error"}, opts.req);
var err = new Error();
err.code = "unexpected_error";
err.status = 400;
return reject(err);
}
return;
}
c--;
if (c === 0) {
if (!errorReported) {
runtime.log.audit({event: "context.get",scope:scope,id:id,store:store,key:key},opts.req);
resolve(result);
}
}
});
})
}
} else {
runtime.log.audit({event: "context.get",scope:scope,id:id,store:store,key:key},opts.req);
resolve({});
}
})
},
/**
* Gets the info of an individual node set
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @param {String} opts.scope - the scope of the context
* @param {String} opts.id - the id of the context
* @param {String} opts.store - the context store
* @param {String} opts.key - the context key
* @param {Object} opts.req - the request to log (optional)
* @return {Promise} - the node information
* @memberof @node-red/runtime_context
*/
delete: function(opts) {
return new Promise(function(resolve,reject) {
var scope = opts.scope;
var id = opts.id;
var store = opts.store;
var key = opts.key;
var availableStores = runtime.nodes.listContextStores();
//{ default: 'default', stores: [ 'default', 'file' ] }
if (store && availableStores.stores.indexOf(store) === -1) {
runtime.log.audit({event: "context.get",scope:scope,id:id,store:store,key:key,error:"not_found"},opts.req);
var err = new Error();
err.code = "not_found";
err.status = 404;
return reject(err);
}
var ctx;
if (scope === 'global') {
ctx = runtime.nodes.getContext('global');
} else if (scope === 'flow') {
ctx = runtime.nodes.getContext(id);
} else if (scope === 'node') {
var node = runtime.nodes.getNode(id);
if (node) {
ctx = node.context();
}
}
if (ctx) {
if (key) {
store = store || availableStores.default;
ctx.set(key,undefined,store,function(err) {
runtime.log.audit({event: "context.delete",scope:scope,id:id,store:store,key:key},opts.req);
resolve();
});
return;
} else {
// TODO: support deleting whole context
runtime.log.audit({event: "context.get",scope:scope,id:id,store:store,key:key,error:"not_found"},opts.req);
var err = new Error();
err.code = "not_found";
err.status = 404;
return reject(err);
// var stores;
// if (!store) {
// stores = availableStores.stores;
// } else {
// stores = [store];
// }
//
// var result = {};
// var c = stores.length;
// var errorReported = false;
// stores.forEach(function(store) {
// exportContextStore(scope,ctx,store,result,function(err) {
// if (err) {
// // TODO: proper error reporting
// if (!errorReported) {
// errorReported = true;
// runtime.log.audit({event: "context.delete",scope:scope,id:id,store:store,key:key,error:"unexpected_error"});
// var err = new Error();
// err.code = "unexpected_error";
// err.status = 400;
// return reject(err);
// }
//
// return;
// }
// c--;
// if (c === 0) {
// if (!errorReported) {
// runtime.log.audit({event: "context.get",scope:scope,id:id,store:store,key:key});
// resolve(result);
// }
// }
// });
// })
}
} else {
runtime.log.audit({event: "context.delete",scope:scope,id:id,store:store,key:key},opts.req);
resolve();
}
});
}
}