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Simplify request mapping.

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This commit is contained in:
Richard Lewis 2018-03-09 23:04:00 +00:00
parent 7e062090de
commit 46f46ee294
1 changed files with 20 additions and 52 deletions
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72
src/MatrixPostMessageApi.js
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@ -16,36 +16,6 @@ limitations under the License.
import Promise from "bluebird";
function defer() {
let resolve;
let reject;
let isPending = true;
const promise = new Promise(function(...args) {
resolve = args[0];
reject = args[1];
});
return {
resolve: function(...args) {
if (!isPending) {
return;
}
isPending = false;
resolve(args[0]);
},
reject: function(...args) {
if (!isPending) {
return;
}
isPending = false;
reject(args[0]);
},
isPending: function() {
return isPending;
},
promise: promise,
};
}
// NOTE: PostMessageApi only handles message events with a data payload with a
// response field
export default class PostMessageApi {
@ -53,8 +23,8 @@ export default class PostMessageApi {
this._window = targetWindow || window.parent; // default to parent window
this._timeoutMs = timeoutMs || 5000; // default to 5s timer
this._counter = 0;
this._pending = {
// $ID: Deferred
this._requestMap = {
// $ID: {resolve, reject}
};
}
@ -82,15 +52,12 @@ export default class PostMessageApi {
if (payload.response === undefined) {
return;
}
const deferred = self._pending[payload._id];
if (!deferred) {
const promise = self._requestMap[payload._id];
if (!promise) {
return;
}
if (!deferred.isPending()) {
return;
}
delete self._pending[payload._id];
deferred.resolve(payload);
delete self._requestMap[payload._id];
promise.resolve(payload);
};
return this._onMsgCallback;
}
@ -99,19 +66,20 @@ export default class PostMessageApi {
this._counter += 1;
target = target || "*";
action._id = Date.now() + "-" + Math.random().toString(36) + "-" + this._counter;
const d = defer();
this._pending[action._id] = d;
this._window.postMessage(action, target);
if (this._timeoutMs > 0) {
setTimeout(function() {
if (!d.isPending()) {
return;
}
console.error("postMessage request timed out. Sent object: " + JSON.stringify(action));
d.reject(new Error("Timed out"));
}, this._timeoutMs);
}
return d.promise;
return new Promise((resolve, reject) => {
this._requestMap[action._id] = {resolve, reject};
this._window.postMessage(action, target);
if (this._timeoutMs > 0) {
setTimeout(() => {
if (!this._requestMap[action._id]) {
return;
}
console.error("postMessage request timed out. Sent object: " + JSON.stringify(action));
this._requestMap[action._id].reject(new Error("Timed out"));
}, this._timeoutMs);
}
});
}
}