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[#209,backend/memory] Code refactored (less side-effects) to be moved from backends

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Krzysztof Trzewiczek 2012-08-08 21:37:11 +02:00
parent e701f11e29
commit b39f858f69
1 changed files with 35 additions and 22 deletions
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57
src/backend.memory.js
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@ -90,30 +90,43 @@ this.recline.Backend.Memory = this.recline.Backend.Memory || {};
// in place filtering
this._applyFilters = function(results, queryObj) {
_.each(queryObj.filters, function(filter) {
switch (filter.type) {
case 'term':
results = _.filter(results, function(doc) {
return (doc[filter.field] === filter.term);
});
break;
case 'range':
results = _.filter(results, function (doc) {
// TODO handle different data types correctly
var number = !isNaN(parseFloat(filter.start, 10));
var start = number ? parseFloat(filter.start, 10) : filter.start;
var stop = number ? parseFloat(filter.stop, 10) : filter.stop;
var value = number ? parseFloat(doc[filter.field]) : doc[filter.field];
var filters = queryObj.filters;
// register filters
var filterFunctions = {
term : term,
range : range,
geo_distance : geo_distance
};
return (value >= start && value <= stop);
});
break;
case 'geo_distance':
// TODO code here
break;
}
// filter records
return _.filter(results, function (record) {
var passes = _.map(filters, function (filter) {
return filterFunctions[filter.type](record, filter);
});
// return only these records that pass all filters
return _.all(passes, _.identity);
});
return results;
// filters definitions
function term(record, filter) {
return (record[filter.field] === filter.term);
}
function range(record, filter) {
// TODO handle different data types correctly
var number = !isNaN(parseFloat(filter.start, 10));
var start = number ? parseFloat(filter.start, 10) : filter.start;
var stop = number ? parseFloat(filter.stop, 10) : filter.stop;
var value = number ? parseFloat(record[filter.field]) : record[filter.field];
return (value >= start && value <= stop);
}
function geo_distance() {
// TODO code here
}
};
// we OR across fields but AND across terms in query string