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availablity check before run on active tab

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jebbs
2020-01-11 20:40:25 +08:00
parent 341abebc66
commit f1cf32b83a
3 changed files with 20 additions and 6 deletions
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12
scripts/background/messaging.js
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@ -4,12 +4,15 @@
* @param {object} tab the table where to send the message
* @param {object} req the request data.
* @param {function} cond success condition function, r:any=>boolean
* @param {number} interval interval for detecting
* @param {number} interval retry interval, default: 500ms.
* @param {number} limit retry limit, default: 0, no limit.
* @param {string} log messages logged to console.
* @return {Promise} a promise of the response.
*/
function sendMessage(tab, req, log, cond, interval) {
function sendMessage(tab, req, log, cond, interval, limit = 0) {
interval = interval || 500;
limit = limit && !isNaN(limit) ? limit : 0;
count = 0;
return new Promise((resolve, reject) => {
loop();
@ -22,6 +25,11 @@ function sendMessage(tab, req, log, cond, interval) {
return;
}
if (limit && count >= limit) {
reject(`sendMessage loop limit ${limit} reached.`);
return;
}
count++;
chrome.tabs.sendMessage(tab.id, req, r => {
// check error but do nothing.
// do not interrupt promise chains even if error, or the task always fail when: