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[MessageHandler] Replace the internal isReply property, as sent when Promise callbacks are used, with enumeration values

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Given that the `isReply` property is an internal implementation detail, changing its type shouldn't be a problem. Note that by directly indicating if either data or an Error is sent, it's no longer necessary to use `in` when handling the callback.
This commit is contained in:
Jonas Jenwald 2019-10-25 13:37:28 +02:00
parent 72bd8e8bdb
commit 3e46e800a0
1 changed files with 14 additions and 5 deletions
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19
src/shared/message_handler.js
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@ -18,6 +18,12 @@ import {
ReadableStream, UnexpectedResponseException, UnknownErrorException
} from './util';
const CallbackKind = {
UNKNOWN: 0,
DATA: 1,
ERROR: 2,
};
const StreamKind = {
UNKNOWN: 0,
CANCEL: 1,
@ -73,15 +79,18 @@ function MessageHandler(sourceName, targetName, comObj) {
}
if (data.stream) {
this._processStreamMessage(data);
} else if (data.isReply) {
} else if (data.callback) {
let callbackId = data.callbackId;
if (data.callbackId in callbacksCapabilities) {
let callback = callbacksCapabilities[callbackId];
delete callbacksCapabilities[callbackId];
if ('reason' in data) {
if (data.callback === CallbackKind.DATA) {
callback.resolve(data.data);
} else if (data.callback === CallbackKind.ERROR) {
callback.reject(wrapReason(data.reason));
} else {
callback.resolve(data.data);
throw new Error('Unexpected callback case');
}
} else {
throw new Error(`Cannot resolve callback ${callbackId}`);
@ -97,7 +106,7 @@ function MessageHandler(sourceName, targetName, comObj) {
comObj.postMessage({
sourceName,
targetName,
isReply: true,
callback: CallbackKind.DATA,
callbackId: data.callbackId,
data: result,
});
@ -105,7 +114,7 @@ function MessageHandler(sourceName, targetName, comObj) {
comObj.postMessage({
sourceName,
targetName,
isReply: true,
callback: CallbackKind.ERROR,
callbackId: data.callbackId,
reason: wrapReason(reason),
});