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Added option cacheTimeout #725

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Added option cacheTimeout #725

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17 changes: 17 additions & 0 deletions src/instafeed.js
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ function Instafeed(options) {
apiTimeout: 10000,
apiLimit: null,
before: null,
cacheTimeout: 0,
debug: false,
error: null,
filter: null,
Expand Down Expand Up @@ -510,13 +511,27 @@ Instafeed.prototype._makeApiRequest = function makeApiRequest(url, callback) {
var called = false;
var scope = this;
var apiRequest = null;
var cachedRequest = this._cache[url];
var callbackOnce = function callbackOnce(err, value) {
if (!called) {
called = true;
if (scope._options.cacheTimeout) {
scope._cache[url] = {
date: new Date().getTime(),
err: err,
value: value
};
}
callback(err, value);
}
};

if (cachedRequest && this._options.cacheTimeout) {
if ((cachedRequest.date - this._options.cacheTimeout) < new Date().getTime()) {
return callback(cachedRequest.err, cachedRequest.value);
}
}

apiRequest = new XMLHttpRequest();

apiRequest.ontimeout = function apiRequestTimedOut() {
Expand Down Expand Up @@ -621,4 +636,6 @@ Instafeed.prototype._runHook = function runHook(hookName, data) {
return success;
};

Instafeed.prototype._cache = {};

export default Instafeed;