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caching and debouncing at the taginfo level

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This commit is contained in:
Ansis Brammanis
2013-02-25 15:39:00 -05:00
parent 5e3eb4d247
commit 24ae1ecd63
1 changed files with 21 additions and 6 deletions
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js/id/services/taginfo.js
+21 -6
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@@ -14,6 +14,8 @@ iD.taginfo = function() {
line: 'ways'
};
var cache = this.cache = {};
function sets(parameters, n, o) {
if (parameters.geometry && o[parameters.geometry]) {
parameters[n] = o[parameters.geometry];
@@ -34,9 +36,9 @@ iD.taginfo = function() {
}
function popularKeys(parameters) {
var pop_field = 'count_all_fraction';
if (parameters.filter) pop_field = 'count_' + parameters.filter + '_fraction';
return function(d) { return parseFloat(d[pop_field]) > 0.01; };
var pop_field = 'count_all';
if (parameters.filter) pop_field = 'count_' + parameters.filter;
return function(d) { return parseFloat(d[pop_field]) > 10000; };
}
function popularValues(parameters) {
@@ -52,9 +54,22 @@ iD.taginfo = function() {
};
}
var debounced = _.debounce(d3.json, 100, true);
function request(url, callback) {
if (cache[url]) {
callback(null, cache[url]);
} else {
debounced(url, function(err, data) {
if (!err) cache[url] = data;
callback(err, data);
});
}
}
taginfo.keys = function(parameters, callback) {
parameters = clean(setSort(setFilter(parameters)));
d3.json(endpoint + 'keys/all?' +
request(endpoint + 'keys/all?' +
iD.util.qsString(_.extend({
rp: 6,
sortname: 'count_all',
@@ -68,7 +83,7 @@ iD.taginfo = function() {
taginfo.values = function(parameters, callback) {
parameters = clean(setSort(setFilter(parameters)));
d3.json(endpoint + 'key/values?' +
request(endpoint + 'key/values?' +
iD.util.qsString(_.extend({
rp: 20,
sortname: 'count_all',
@@ -82,7 +97,7 @@ iD.taginfo = function() {
taginfo.docs = function(parameters, callback) {
parameters = clean(setSort(parameters));
d3.json(endpoint + 'tag/wiki_pages?' +
request(endpoint + 'tag/wiki_pages?' +
iD.util.qsString(parameters), callback);
};