webapi-eca/js/components-manager.js
2014-04-05 03:09:40 +02:00

369 lines
11 KiB
JavaScript

// Generated by CoffeeScript 1.7.1
/*
Components Manager
==================
> The components manager takes care of the dynamic JS modules and the rules.
> Event Poller and Action Invoker modules are loaded as strings and stored in the database,
> then compiled into node modules and rules and used in the engine and event poller.
*/
(function() {
var commandFunctions, db, dynmod, eventEmitter, events, exports, forgeModule, fs, getModuleParams, getModules, hasRequiredParams, path;
db = require('./persistence');
dynmod = require('./dynamic-modules');
fs = require('fs');
path = require('path');
events = require('events');
eventEmitter = new events.EventEmitter();
/*
Module call
-----------
Initializes the Components Manager and constructs a new Event Emitter.
@param {Object} args
*/
exports = module.exports = (function(_this) {
return function(args) {
_this.log = args.logger;
db(args);
dynmod(args);
return module.exports;
};
})(this);
/*
Add an event handler (eh) that listens for rules.
@public addRuleListener ( *eh* )
@param {function} eh
*/
exports.addRuleListener = (function(_this) {
return function(eh) {
eventEmitter.addListener('rule', eh);
return db.getAllActivatedRuleIdsPerUser(function(err, objUsers) {
var fGoThroughUsers, rules, user, _results;
fGoThroughUsers = function(user, rules) {
var fFetchRule, rule, _i, _len, _results;
fFetchRule = function(rule) {
return db.getRule(rule, (function(_this) {
return function(err, oRule) {
return eventEmitter.emit('rule', {
event: 'init',
user: user,
rule: JSON.parse(oRule)
});
};
})(this));
};
_results = [];
for (_i = 0, _len = rules.length; _i < _len; _i++) {
rule = rules[_i];
_results.push(fFetchRule(rule));
}
return _results;
};
_results = [];
for (user in objUsers) {
rules = objUsers[user];
_results.push(fGoThroughUsers(user, rules));
}
return _results;
});
};
})(this);
/*
Processes a user request coming through the request-handler.
- `user` is the user object as it comes from the DB.
- `oReq` is the request object that contains:
- `command` as a string
- `payload` an optional stringified JSON object
The callback function `callback( obj )` will receive an object
containing the HTTP response code and a corresponding message.
@public processRequest ( *user, oReq, callback* )
*/
exports.processRequest = function(user, oReq, callback) {
var dat, err;
if (!oReq.payload) {
oReq.payload = '{}';
}
try {
dat = JSON.parse(oReq.payload);
} catch (_error) {
err = _error;
return callback({
code: 404,
message: 'You had a strange payload in your request!'
});
}
if (commandFunctions[oReq.command]) {
return commandFunctions[oReq.command](user, dat, callback);
} else {
return callback({
code: 404,
message: 'What do you want from me?'
});
}
};
/*
Checks whether all required parameters are present in the payload.
@private hasRequiredParams ( *arrParams, oPayload* )
@param {Array} arrParams
@param {Object} oPayload
*/
hasRequiredParams = function(arrParams, oPayload) {
var answ, param, _i, _len;
answ = {
code: 400,
message: "Your request didn't contain all necessary fields! Requires: " + (arrParams.join())
};
for (_i = 0, _len = arrParams.length; _i < _len; _i++) {
param = arrParams[_i];
if (!oPayload[param]) {
return answ;
}
}
answ.code = 200;
answ.message = 'All required properties found';
return answ;
};
/*
Fetches all available modules and return them together with the available functions.
@private getModules ( *user, oPayload, dbMod, callback* )
@param {Object} user
@param {Object} oPayload
@param {Object} dbMod
@param {function} callback
*/
getModules = function(user, oPayload, dbMod, callback) {
return dbMod.getAvailableModuleIds(user.username, function(err, arrNames) {
var answReq, fGetFunctions, id, oRes, sem, _i, _len, _results;
oRes = {};
answReq = function() {
return callback({
code: 200,
message: JSON.stringify(oRes)
});
};
sem = arrNames.length;
if (sem === 0) {
return answReq();
} else {
fGetFunctions = (function(_this) {
return function(id) {
return dbMod.getModule(id, function(err, oModule) {
if (oModule) {
oRes[id] = JSON.parse(oModule.functions);
}
if (--sem === 0) {
return answReq();
}
});
};
})(this);
_results = [];
for (_i = 0, _len = arrNames.length; _i < _len; _i++) {
id = arrNames[_i];
_results.push(fGetFunctions(id));
}
return _results;
}
});
};
getModuleParams = function(user, oPayload, dbMod, callback) {
var answ;
answ = hasRequiredParams(['id'], oPayload);
if (answ.code !== 200) {
return callback(answ);
} else {
return dbMod.getModuleParams(oPayload.id, function(err, oPayload) {
answ.message = oPayload;
return callback(answ);
});
}
};
forgeModule = (function(_this) {
return function(user, oPayload, dbMod, callback) {
var answ;
answ = hasRequiredParams(['id', 'params', 'lang', 'data'], oPayload);
if (answ.code !== 200) {
return callback(answ);
} else {
return dbMod.getModule(oPayload.id, function(err, mod) {
var src;
if (mod) {
answ.code = 409;
answ.message = 'Module name already existing: ' + oPayload.id;
return callback(answ);
} else {
src = oPayload.data;
return dynmod.compileString(src, user.username, 'dummyRule', oPayload.id, oPayload.lang, null, function(cm) {
var funcs, id, name, _ref;
answ = cm.answ;
if (answ.code === 200) {
funcs = [];
_ref = cm.module;
for (name in _ref) {
id = _ref[name];
funcs.push(name);
}
_this.log.info("CM | Storing new module with functions " + (funcs.join()));
answ.message = "Event Poller module successfully stored! Found following function(s): " + funcs;
oPayload.functions = JSON.stringify(funcs);
dbMod.storeModule(user.username, oPayload);
if (oPayload["public"] === 'true') {
dbMod.publish(oPayload.id);
}
}
return callback(answ);
});
}
});
}
};
})(this);
commandFunctions = {
get_public_key: function(user, oPayload, callback) {
return callback({
code: 200,
message: dynmod.getPublicKey()
});
},
get_event_pollers: function(user, oPayload, callback) {
return getModules(user, oPayload, db.eventPollers, callback);
},
get_action_invokers: function(user, oPayload, callback) {
return getModules(user, oPayload, db.actionInvokers, callback);
},
get_event_poller_params: function(user, oPayload, callback) {
return getModuleParams(user, oPayload, db.eventPollers, callback);
},
get_action_invoker_params: function(user, oPayload, callback) {
return getModuleParams(user, oPayload, db.actionInvokers, callback);
},
forge_event_poller: function(user, oPayload, callback) {
return forgeModule(user, oPayload, db.eventPollers, callback);
},
forge_action_invoker: function(user, oPayload, callback) {
return forgeModule(user, oPayload, db.actionInvokers, callback);
},
get_rules: function(user, oPayload, callback) {
return db.getUserLinkedRules(user.username, function(err, obj) {
return callback({
code: 200,
message: obj
});
});
},
get_rule_log: function(user, oPayload, callback) {
var answ;
answ = hasRequiredParams(['id'], oPayload);
if (answ.code !== 200) {
return callback(answ);
} else {
return db.getLog(user.username, oPayload.id, function(err, obj) {
return callback({
code: 200,
message: obj
});
});
}
},
delete_rule: function(user, oPayload, callback) {
var answ;
answ = hasRequiredParams(['id'], oPayload);
if (answ.code !== 200) {
return callback(answ);
} else {
db.deleteRule(oPayload.id);
eventEmitter.emit('rule', {
event: 'del',
user: user.username,
rule: null,
ruleId: oPayload.id
});
return callback({
code: 200,
message: 'OK!'
});
}
},
forge_rule: function(user, oPayload, callback) {
var answ;
answ = hasRequiredParams(['id', 'event', 'conditions', 'actions'], oPayload);
if (answ.code !== 200) {
return callback(answ);
} else {
return db.getRule(oPayload.id, function(err, oExisting) {
var arrParams, epModId, id, params, rule, strRule;
if (oExisting !== null) {
answ = {
code: 409,
message: 'Rule name already existing!'
};
} else {
rule = {
id: oPayload.id,
event: oPayload.event,
conditions: oPayload.conditions,
actions: oPayload.actions
};
strRule = JSON.stringify(rule);
db.storeRule(rule.id, strRule);
db.linkRule(rule.id, user.username);
db.activateRule(rule.id, user.username);
if (oPayload.event_params) {
epModId = rule.event.split(' -> ')[0];
db.eventPollers.storeUserParams(epModId, user.username, oPayload.event_params);
}
arrParams = oPayload.action_params;
for (id in arrParams) {
params = arrParams[id];
db.actionInvokers.storeUserParams(id, user.username, JSON.stringify(params));
}
eventEmitter.emit('rule', {
event: 'new',
user: user.username,
rule: rule
});
answ = {
code: 200,
message: "Rule '" + rule.id + "' stored and activated!"
};
}
return callback(answ);
});
}
}
};
}).call(this);