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Diffstat (limited to 'ecomp-portal-FE/client/bower_components/angular-ui-router/src/resolve.js')
-rw-r--r-- | ecomp-portal-FE/client/bower_components/angular-ui-router/src/resolve.js | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/ecomp-portal-FE/client/bower_components/angular-ui-router/src/resolve.js b/ecomp-portal-FE/client/bower_components/angular-ui-router/src/resolve.js new file mode 100644 index 00000000..019338dd --- /dev/null +++ b/ecomp-portal-FE/client/bower_components/angular-ui-router/src/resolve.js @@ -0,0 +1,252 @@ +/** + * @ngdoc object + * @name ui.router.util.$resolve + * + * @requires $q + * @requires $injector + * + * @description + * Manages resolution of (acyclic) graphs of promises. + */ +$Resolve.$inject = ['$q', '$injector']; +function $Resolve( $q, $injector) { + + var VISIT_IN_PROGRESS = 1, + VISIT_DONE = 2, + NOTHING = {}, + NO_DEPENDENCIES = [], + NO_LOCALS = NOTHING, + NO_PARENT = extend($q.when(NOTHING), { $$promises: NOTHING, $$values: NOTHING }); + + + /** + * @ngdoc function + * @name ui.router.util.$resolve#study + * @methodOf ui.router.util.$resolve + * + * @description + * Studies a set of invocables that are likely to be used multiple times. + * <pre> + * $resolve.study(invocables)(locals, parent, self) + * </pre> + * is equivalent to + * <pre> + * $resolve.resolve(invocables, locals, parent, self) + * </pre> + * but the former is more efficient (in fact `resolve` just calls `study` + * internally). + * + * @param {object} invocables Invocable objects + * @return {function} a function to pass in locals, parent and self + */ + this.study = function (invocables) { + if (!isObject(invocables)) throw new Error("'invocables' must be an object"); + var invocableKeys = objectKeys(invocables || {}); + + // Perform a topological sort of invocables to build an ordered plan + var plan = [], cycle = [], visited = {}; + function visit(value, key) { + if (visited[key] === VISIT_DONE) return; + + cycle.push(key); + if (visited[key] === VISIT_IN_PROGRESS) { + cycle.splice(0, indexOf(cycle, key)); + throw new Error("Cyclic dependency: " + cycle.join(" -> ")); + } + visited[key] = VISIT_IN_PROGRESS; + + if (isString(value)) { + plan.push(key, [ function() { return $injector.get(value); }], NO_DEPENDENCIES); + } else { + var params = $injector.annotate(value); + forEach(params, function (param) { + if (param !== key && invocables.hasOwnProperty(param)) visit(invocables[param], param); + }); + plan.push(key, value, params); + } + + cycle.pop(); + visited[key] = VISIT_DONE; + } + forEach(invocables, visit); + invocables = cycle = visited = null; // plan is all that's required + + function isResolve(value) { + return isObject(value) && value.then && value.$$promises; + } + + return function (locals, parent, self) { + if (isResolve(locals) && self === undefined) { + self = parent; parent = locals; locals = null; + } + if (!locals) locals = NO_LOCALS; + else if (!isObject(locals)) { + throw new Error("'locals' must be an object"); + } + if (!parent) parent = NO_PARENT; + else if (!isResolve(parent)) { + throw new Error("'parent' must be a promise returned by $resolve.resolve()"); + } + + // To complete the overall resolution, we have to wait for the parent + // promise and for the promise for each invokable in our plan. + var resolution = $q.defer(), + result = resolution.promise, + promises = result.$$promises = {}, + values = extend({}, locals), + wait = 1 + plan.length/3, + merged = false; + + function done() { + // Merge parent values we haven't got yet and publish our own $$values + if (!--wait) { + if (!merged) merge(values, parent.$$values); + result.$$values = values; + result.$$promises = result.$$promises || true; // keep for isResolve() + delete result.$$inheritedValues; + resolution.resolve(values); + } + } + + function fail(reason) { + result.$$failure = reason; + resolution.reject(reason); + } + + // Short-circuit if parent has already failed + if (isDefined(parent.$$failure)) { + fail(parent.$$failure); + return result; + } + + if (parent.$$inheritedValues) { + merge(values, omit(parent.$$inheritedValues, invocableKeys)); + } + + // Merge parent values if the parent has already resolved, or merge + // parent promises and wait if the parent resolve is still in progress. + extend(promises, parent.$$promises); + if (parent.$$values) { + merged = merge(values, omit(parent.$$values, invocableKeys)); + result.$$inheritedValues = omit(parent.$$values, invocableKeys); + done(); + } else { + if (parent.$$inheritedValues) { + result.$$inheritedValues = omit(parent.$$inheritedValues, invocableKeys); + } + parent.then(done, fail); + } + + // Process each invocable in the plan, but ignore any where a local of the same name exists. + for (var i=0, ii=plan.length; i<ii; i+=3) { + if (locals.hasOwnProperty(plan[i])) done(); + else invoke(plan[i], plan[i+1], plan[i+2]); + } + + function invoke(key, invocable, params) { + // Create a deferred for this invocation. Failures will propagate to the resolution as well. + var invocation = $q.defer(), waitParams = 0; + function onfailure(reason) { + invocation.reject(reason); + fail(reason); + } + // Wait for any parameter that we have a promise for (either from parent or from this + // resolve; in that case study() will have made sure it's ordered before us in the plan). + forEach(params, function (dep) { + if (promises.hasOwnProperty(dep) && !locals.hasOwnProperty(dep)) { + waitParams++; + promises[dep].then(function (result) { + values[dep] = result; + if (!(--waitParams)) proceed(); + }, onfailure); + } + }); + if (!waitParams) proceed(); + function proceed() { + if (isDefined(result.$$failure)) return; + try { + invocation.resolve($injector.invoke(invocable, self, values)); + invocation.promise.then(function (result) { + values[key] = result; + done(); + }, onfailure); + } catch (e) { + onfailure(e); + } + } + // Publish promise synchronously; invocations further down in the plan may depend on it. + promises[key] = invocation.promise; + } + + return result; + }; + }; + + /** + * @ngdoc function + * @name ui.router.util.$resolve#resolve + * @methodOf ui.router.util.$resolve + * + * @description + * Resolves a set of invocables. An invocable is a function to be invoked via + * `$injector.invoke()`, and can have an arbitrary number of dependencies. + * An invocable can either return a value directly, + * or a `$q` promise. If a promise is returned it will be resolved and the + * resulting value will be used instead. Dependencies of invocables are resolved + * (in this order of precedence) + * + * - from the specified `locals` + * - from another invocable that is part of this `$resolve` call + * - from an invocable that is inherited from a `parent` call to `$resolve` + * (or recursively + * - from any ancestor `$resolve` of that parent). + * + * The return value of `$resolve` is a promise for an object that contains + * (in this order of precedence) + * + * - any `locals` (if specified) + * - the resolved return values of all injectables + * - any values inherited from a `parent` call to `$resolve` (if specified) + * + * The promise will resolve after the `parent` promise (if any) and all promises + * returned by injectables have been resolved. If any invocable + * (or `$injector.invoke`) throws an exception, or if a promise returned by an + * invocable is rejected, the `$resolve` promise is immediately rejected with the + * same error. A rejection of a `parent` promise (if specified) will likewise be + * propagated immediately. Once the `$resolve` promise has been rejected, no + * further invocables will be called. + * + * Cyclic dependencies between invocables are not permitted and will cause `$resolve` + * to throw an error. As a special case, an injectable can depend on a parameter + * with the same name as the injectable, which will be fulfilled from the `parent` + * injectable of the same name. This allows inherited values to be decorated. + * Note that in this case any other injectable in the same `$resolve` with the same + * dependency would see the decorated value, not the inherited value. + * + * Note that missing dependencies -- unlike cyclic dependencies -- will cause an + * (asynchronous) rejection of the `$resolve` promise rather than a (synchronous) + * exception. + * + * Invocables are invoked eagerly as soon as all dependencies are available. + * This is true even for dependencies inherited from a `parent` call to `$resolve`. + * + * As a special case, an invocable can be a string, in which case it is taken to + * be a service name to be passed to `$injector.get()`. This is supported primarily + * for backwards-compatibility with the `resolve` property of `$routeProvider` + * routes. + * + * @param {object} invocables functions to invoke or + * `$injector` services to fetch. + * @param {object} locals values to make available to the injectables + * @param {object} parent a promise returned by another call to `$resolve`. + * @param {object} self the `this` for the invoked methods + * @return {object} Promise for an object that contains the resolved return value + * of all invocables, as well as any inherited and local values. + */ + this.resolve = function (invocables, locals, parent, self) { + return this.study(invocables)(locals, parent, self); + }; +} + +angular.module('ui.router.util').service('$resolve', $Resolve); + |