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diBus.js
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diBus.js
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var DIBus = function() {
var self = this;
this.registeredModules = [];
this.register = function(moduleToRun) {
if (typeof moduleToRun.service == 'function') {
self.registeredModules.push(moduleToRun);
checkAllModules();
}
};
this.new = function() {
return new DIBus();
};
function checkAllModules() {
//Get a list of modules that are not loaded
var unloadedModules = getAllUnloadedModules();
//And attempt to load them
unloadedModules.forEach(function (unloadedModule) {
var success = tryStartModule(unloadedModule);
});
if (getAllUnloadedModules().length > 0) setTimeout(checkAllModules, 300);
}
function tryStartModule(moduleToStart) {
var dependencies = getArgs(moduleToStart.service);
if (allDepsLoaded(dependencies)) {
var depsToInject = getDeps(dependencies);
moduleToStart.instance = moduleToStart.service.apply(
moduleToStart,
depsToInject
);
moduleToStart.loaded = true;
return true;
}
return false;
}
function getArgs(func) {
return (func+'').replace(/\s+/g,'')
.replace(/[/][*][^/*]*[*][/]/g,'')
.split('){',1)[0].replace(/^[^(]*[(]/,'')
.replace(/=[^,]+/g,'')
.split(',').filter(Boolean);
}
function getAllUnloadedModules() {
return self.registeredModules.filter(function(selectedModule) {
return selectedModule.loaded == undefined || selectedModule.loaded == false;
});
}
function getDeps(depNames) {
var deps = [];
if (depNames.length > 0) {
for (var i = 0; i < depNames.length; i++) {
var dep = depNames[i];
deps.push(self.registeredModules.filter(function (thisDep) {
return thisDep.name == dep;
})[0].instance);
}
}
return deps;
}
function allDepsLoaded(depNames) {
var deps = [];
if (depNames.length > 0) {
for (var i = 0; i < depNames.length; i++) {
var dep = depNames[i];
deps.push(self.registeredModules.filter(function (thisDep) {
return thisDep.name == dep;
})[0]);
}
}
var unloadedDeps = deps.filter(function(dep) {
return dep == undefined ||
dep.loaded == undefined ||
dep.loaded == false;
});
return unloadedDeps.length == 0;
}
}
module.exports = new DIBus();