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authorChristopher Baines <cb15g11@soton.ac.uk>2014-09-20 15:32:03 +0100
committerChristopher Baines <cb15g11@soton.ac.uk>2014-09-20 15:32:03 +0100
commit87cbe3dcd4159c6ddbc76a8be27c0b989d70dc76 (patch)
tree05987b057061da6a49d9282636eda548524da3d8
parentc9f80f3d8fd3ec2d00c588dc7bacf0dbc329eda8 (diff)
downloadleaflet-soton-87cbe3dcd4159c6ddbc76a8be27c0b989d70dc76.tar
leaflet-soton-87cbe3dcd4159c6ddbc76a8be27c0b989d70dc76.tar.gz
Store the data in localStorage
It will currently be refreshed after 1 week.
-rw-r--r--src/leaflet-soton.js33
1 files changed, 31 insertions, 2 deletions
diff --git a/src/leaflet-soton.js b/src/leaflet-soton.js
index ac5754b..65e8e6e 100644
--- a/src/leaflet-soton.js
+++ b/src/leaflet-soton.js
@@ -12,6 +12,8 @@
workstationData: null,
updateWorkstationData: true, // regularly poll for workstation data
workstationDataUpdateTime: 30000, // time to wait between requests
+ useLocalStorage: true,
+ localStorageTimeout: 604800000, // one day in milliseconds
_workstationDataFetchInProgress: false,
_workstationDataFetchTimeout: null,
@@ -21,9 +23,30 @@
} else {
this.on("dataload", callback);
+ if (LS.useLocalStorage &&
+ 'localStorage' in window && window['localStorage'] !== null) {
+
+ if ("data" in localStorage) {
+ var refetchTime = localStorage.dataTimestamp + LS.localStorageTimeout;
+
+ if (refetchTime > new Date().getTime()) {
+ LS.data = JSON.parse(localStorage.data);
+
+ LS.fire("dataload", LS.data);
+
+ return;
+
+ }
+
+ // refresh the data, as its too old
+ }
+
+ // data not in local storage, so fetch it
+ }
+
if (!this._dataFetchInProgress) {
this._dataFetchInProgress = true;
- getJSON({url: LS.dataPath, cache: false} , function(data) {
+ getJSON({url: LS.dataPath, cache: false} , function(data, stringData) {
LS._dataFetchInProgress = false;
if (data === null) {
@@ -35,6 +58,12 @@
LS.data = data;
+ if (LS.useLocalStorage &&
+ 'localStorage' in window && window['localStorage'] !== null) {
+ localStorage.data = stringData;
+ localStorage.dataTimestamp = new Date().getTime();
+ }
+
LS.fire("dataload", data);
});
}
@@ -1648,7 +1677,7 @@ SELECT * WHERE {\
xhttp.send(options.data);
xhttp.onreadystatechange = function() {
if (xhttp.status == 200 && xhttp.readyState == 4) {
- callback(JSON.parse(xhttp.responseText));
+ callback(JSON.parse(xhttp.responseText), xhttp.responseText);
}
};
}