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const ROOT_NAMESPACE_NAME = '__rootNamespace__';
class Namespace {
constructor(name, parentNamespace) {
this.name = name;
this.parentNamespace = parentNamespace;
this.childNamespaces = {};
this.tasks = {};
this.rules = {};
this.path = this.getPath();
}
get fullName() {
return this._getFullName();
}
addTask(task) {
this.tasks[task.name] = task;
task.namespace = this;
}
resolveTask(name) {
if (!name) {
return;
}
let taskPath = name.split(':');
let taskName = taskPath.pop();
let task;
let ns;
// Namespaced, return either relative to current, or from root
if (taskPath.length) {
taskPath = taskPath.join(':');
ns = this.resolveNamespace(taskPath) ||
Namespace.ROOT_NAMESPACE.resolveNamespace(taskPath);
task = (ns && ns.resolveTask(taskName));
}
// Bare task, return either local, or top-level
else {
task = this.tasks[name] || Namespace.ROOT_NAMESPACE.tasks[name];
}
return task || null;
}
resolveNamespace(relativeName) {
if (!relativeName) {
return this;
}
let parts = relativeName.split(':');
let ns = this;
for (let i = 0, ii = parts.length; (ns && i < ii); i++) {
ns = ns.childNamespaces[parts[i]];
}
return ns || null;
}
matchRule(relativeName) {
let parts = relativeName.split(':');
parts.pop();
let ns = this.resolveNamespace(parts.join(':'));
let rules = ns ? ns.rules : [];
let r;
let match;
for (let p in rules) {
r = rules[p];
if (r.match(relativeName)) {
match = r;
}
}
return (ns && match) ||
(this.parentNamespace &&
this.parentNamespace.matchRule(relativeName));
}
getPath() {
let parts = [];
let next = this.parentNamespace;
while (next) {
parts.push(next.name);
next = next.parentNamespace;
}
parts.pop(); // Remove '__rootNamespace__'
return parts.reverse().join(':');
}
_getFullName() {
let path = this.path;
path = (path && path.split(':')) || [];
path.push(this.name);
return path.join(':');
}
isRootNamespace() {
return !this.parentNamespace;
}
}
class RootNamespace extends Namespace {
constructor() {
super(ROOT_NAMESPACE_NAME, null);
Namespace.ROOT_NAMESPACE = this;
}
}
module.exports.Namespace = Namespace;
module.exports.RootNamespace = RootNamespace;