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plugins.js
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294 lines (246 loc) · 6.15 KB
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"use strict"
var Utils = require('./utils.js'),
OCPP = require('./ocpp-protocol.js');
/**
*
*
*
*/
var Plugins = {
plugins: {},
PLUGINS_DIR: 'plugins/',
// ref to Simulators
Simulators: null,
// ref to UI
UI: null,
/**
*
*/
API: {
log: Utils.log,
parse: function(line) {
return Plugins.UI.commandToObject(Plugins.UI.parseLineToTokens(line));
},
cp: {
call: function(procName, args) {
setTimeout(function() {
Plugins.escapeStringArguments(args);
Plugins.Simulators.commandCPtoCS(-1, procName, args);
}, 500);
}
},
cs: {
call: function(procName, args) {
setTimeout(function() {
Plugins.escapeStringArguments(args);
Plugins.Simulators.commandCStoCP(-1, procName, args);
}, 500);
}
},
ocpp_version: null,
system: null,
protocol: null,
chargePointId: null
},
/**
* TODO: give pointers
*
*/
init: function() {},
/**
* TODO: give pointers
*
*/
setAPIFields: function(prot, system, version, cbId) {
Plugins.API.protocol = prot;
Plugins.API.system = system;
Plugins.API.ocpp_version = version;
Plugins.API.chargePointId = cbId;
},
/**
*
*/
load: function(filename) {
// if already exist, unload it
if(Plugins.plugins[filename] != undefined) {
Plugins.unload(filename);
}
var plugin = null;
try {
plugin = require(__dirname + '/../' + Plugins.PLUGINS_DIR + filename +
'.js');
}
catch(exception) {
console.log('Error with the '+ filename +' plugin, invalid or '+
'doesn\'t exist.');
return;
}
// check if plugin is compliant
if(!Plugins.isPluginCompliant(filename, plugin)) {
// errors are printed in the isPluginCompliant function
return;
}
//
Plugins.addHandlers(plugin);
// add to array
Plugins.plugins[filename] = plugin;
// create a special scope
var scope = Utils.clone(Plugins.API);
scope.onResult = plugin.onResult;
scope.onCall = plugin.onCall;
scope.onClientConnectionEvent = plugin.onClientConnectionEvent;
scope.onCommand = plugin.onCommand;
scope.onConnectionEvent = plugin.onConnectionEvent;
scope.onIdle = plugin.onIdle;
scope.unload = function() {
Plugins.unload(filename);
};
// call the main function
Plugins.plugins[filename].onLoad.call(scope);
},
/**
*
*/
unload: function(filename) {
if(Plugins.plugins[filename] == undefined) {
console.log('Error for unloading `'+ filename +'\': file does not exist.');
return;
}
if(Plugins.plugins[filename].onUnload != undefined) {
// call the unload function
Plugins.plugins[filename].onUnload.call(Plugins.API);
}
// delete from array
delete Plugins.plugins[filename];
// delete from require cache
delete require.cache[__dirname.replace('lib', '') + Plugins.PLUGINS_DIR +
filename +'.js'];
},
/**
*
*/
addHandlers: function(plugin) {
plugin.handlers = {
onResultHandler: {},
onCallHandler: {},
onClientConnectionEventHandler: null,
onCommandHandler: null,
onConnectionEventHandler: null,
onIdleHandler: null
};
plugin.onResult = function(procName, handlerFunc) {
plugin.handlers.onResultHandler[procName] = handlerFunc;
};
plugin.onCall = function(procName, handlerFunc) {
plugin.handlers.onCallHandler[procName] = handlerFunc;
};
plugin.onClientConnectionEvent = function(handlerFunc) {
plugin.handlers.onClientConnectionEventHandler = handlerFunc;
};
plugin.onCommand = function(handlerFunc) {
plugin.handlers.onCommandHandler = handlerFunc;
};
plugin.onConnectionEvent = function(handlerFunc) {
plugin.handlers.onConnectionEventHandler = handlerFunc;
};
plugin.onIdle = function(handlerFunc) {
plugin.handlers.onIdleHandler = handlerFunc;
};
},
/**
*
*/
isPluginCompliant: function(filename, plugin) {
// entry point
if(plugin.onLoad == undefined) {
console.log('Error when reading the `'+ filename +'\' plugin: '+
'no entry point `onLoad\' function found.');
return false;
}
return true;
},
/**
*
*/
callResultHandlers: function(procName, values, scope) {
try {
for(var pl in Plugins.plugins) {
Plugins.plugins[pl].handlers.onResultHandler[procName]
.call(scope, values);
}
} catch(e) {}
},
/**
*
*/
callHandlers: function(procName, values, scope) {
var response;
try {
for(var pl in Plugins.plugins) {
response = Plugins.plugins[pl].handlers.onCallHandler[procName]
.call(scope, values);
}
} catch(e) {}
return response;
},
/**
*
*/
callClientConnectionEventHandlers: function(type, cbId, scope) {
try {
for(var pl in Plugins.plugins) {
Plugins.plugins[pl].handlers.onClientConnectionEventHandler
.call(scope, type, cbId);
}
} catch(e) {}
},
/**
*
*/
callCommandHandlers: function(command, scope) {
var ret = false;
try {
for(var pl in Plugins.plugins) {
if(Plugins.plugins[pl].handlers.onCommandHandler.call(scope, command))
ret = true;
}
} catch(e) {}
return ret;
},
/**
*
*/
callConnectionEventHandlers: function(type, cbId, scope) {
try {
for(var pl in Plugins.plugins) {
Plugins.plugins[pl].handlers.onConnectionEventHandler
.call(scope, type, cbId);
}
} catch(e) {}
},
/**
*
*/
callIdleHandlers: function(scope) {
try {
for(var pl in Plugins.plugins) {
Plugins.plugins[pl].handlers.onIdleHandler
.call(scope);
}
} catch(e) {}
},
/**
* Escape string arguments.
* Example: {'status': 'Download'} -> {'status': '"Download"'}
*
* This is mandoratory for JSON parsing functiona afterwards.
*/
escapeStringArguments: function(args) {
for(var arg in args) {
if(typeof args[arg] == 'string') {
args[arg] = '"'+ args[arg] +'"';
}
}
},
};
module.exports = Plugins;