Facets.js
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define(function(require) {
'use strict';
var _ = require('underscore');
var Backbone = require('backbone');
var NestedModels = require('backbone-nested-models');
var Facet = require('./Facet');
var Sort = require('./Sort');
function getField(obj, key) {
return obj[key];
}
function getItemKeyAccessor(item) {
return item.get('key');
}
var Facets = NestedModels.mixin(Backbone.Model.extend({
initialize: function(data, options) {
this.url = function() {
var url = options.search.url;
return _.isFunction(url) ? url.call() : url;
};
_.each(this.keys(), _.bind(function(facetName) {
var facet = this.get(facetName);
_.each({
'item-change': 'item-change',
'change:query': 'child-query',
'change:queryMin': 'item-change',
'change:queryMax': 'item-change',
}, function(eventValue, eventKey) {
facet.on(eventKey, function(model, value, options) {
console.log('trigger', facet.get('formName'), eventValue);
this.trigger(eventValue, facet, null, options);
}, this);
}, this);
}, this));
this._doSuggestions = _.debounce(_.bind(function(childFacet) {
if (childFacet.get('query')) {
this.fetch({
data: this.toJSON({childFacet: childFacet, facetSuggestions: true}),
childFacet: childFacet,
facetSuggestions: true,
merge: true,
traditional: true,
});
} else {
childFacet.set('suggestions', []);
}
}, this), 250);
this.on('child-query', this._doSuggestions, this);
return Facets.__super__.initialize.apply(this, arguments);
},
resetSearch: function(options) {
_.each(this.values(), function(facet) {
facet.get('items').reset(null, options);
});
},
applyFacetResults: function(data, options) {
options = options || {};
var facetCounts = getField(data, 'facet_counts');
var facetIntervals = getField(facetCounts, 'facet_intervals');
var facetRanges = getField(facetCounts, 'facet_ranges');
var facetFields = getField(facetCounts, 'facet_fields');
var facetQueries = getField(facetCounts, 'facet_queries');
var statsFields = getField(data.stats, 'stats_fields');
function getFacetList(facetName, type) {
switch (type) {
case 'year':
case 'range':
return facetRanges[facetName] ? facetRanges[facetName].counts : null;
case 'interval':
return facetIntervals[facetName] ? facetIntervals[facetName].counts : null;
case 'year-field':
case 'field':
return facetFields[facetName];
}
}
_.each(this.keys(), _.bind(function(facetName) {
var facet = this.get(facetName);
var type = facet.facetType;
var suggestions = [];
_.each(getFacetList('suggestions:' + facetName, type), function(value, index) {
if (index % 2 === 0) {
key = value;
} else if (value > 0) {
suggestions.push({key: key, value: value});
}
});
facet.set('suggestions', suggestions);
//if (!!options.facetSuggestions && options.childFacet === facet) {
if (!!options.facetSuggestions) {
return;
}
var key;
var list = getFacetList(facetName, type);
var newItems = [];
var items = facet.get('items');
items.invoke('set', 'hidden', true);
var valueOverrides = {};
var excludeValues = {};
function recordIncludeValueIntoExclude(includeValue, key) {
excludeValues[includeValue] = true;
}
switch (type) {
case 'year-field':
case 'field':
_.each(facet.bins, function(includeValues, key) {
var tag = facetName + ':' + key;
valueOverrides[key] = facetQueries[tag];
_.each(includeValues, recordIncludeValueIntoExclude);
});
break;
}
var addNewItem = _.bind(function addNewItem(key, value) {
if (valueOverrides[key] !== undefined) {
value = valueOverrides[key];
if (!value) {
return;
}
} else if (excludeValues[key]) {
return;
}
var item = items.get({id: key});
if (item) {
item.set({hidden: value === 0, value: value});
} else {
item = new Facet.Item({key: key, value: value});
}
newItems.push(item);
}, this);
function checkOther(set, key) {
if (set.indexOf(facet.other) !== -1) {
addNewItem(key, facetRanges[facetName][key]);
}
}
checkOther(['all', 'before'], 'before');
_.each(list, function(value, index) {
if (index % 2 === 0) {
key = value;
} else if (value > 0) {
addNewItem(key, value);
}
});
switch (type) {
case 'year-field':
case 'field':
_.each(facet.bins, function(includeValues, key) {
var tag = facetName + ':' + key;
addNewItem(key, facetQueries[tag]);
});
break;
}
items.set(newItems, {remove: false});
if (facet.facetStats) {
var thisFacetStats = statsFields[facetName];
facet.set({minValue: thisFacetStats.min, maxValue: thisFacetStats.max});
}
}, this));
},
getFacetFormData: function(options) {
options = options || {};
var result = {
facet: true,
stats: true,
'facet.missing': true,
'facet.field': [],
'facet.range': [],
'facet.interval': [],
'facet.query': [],
'stats.field': [],
fq: [],
};
_.each(this.keys(), _.bind(function(facetName) {
var facet = this.get(facetName);
var queryField = facet.queryField;
var facetField = facet.facetField ? facet.facetField : queryField;
var type = facet.facetType;
var valueFormatter;
var facetOptions = {};
var quoteFormatter = function(value) {
return value.replace ? ('"' + value.replace(/"/, '\\"') + '"') : value;
};
var rangeFormatter = function(from, to) {
return '[' + quoteFormatter(from) + ' TO ' + quoteFormatter(to) + ']';
};
switch (type) {
case 'year':
type = 'range';
quoteFormatter = function(value) {
return value.toISOString();
};
valueFormatter = function(item) {
var key = item.get('key');
var fromDate, toDate;
if (key === 'before') {
return '[* TO ' + facet.rangeStart + '-1SECOND]';
}
fromDate = new Date(key);
toDate = new Date(key);
toDate.setUTCFullYear(toDate.getUTCFullYear() + 1);
return rangeFormatter(fromDate, toDate);
};
if (facet.other) {
facetOptions['facet.range.other'] = facet.other;
}
break;
case 'range':
case 'interval':
valueFormatter = function(item) {
var key = parseInt(item.get('key'));
return rangeFormatter(key, key + facet.rangeGap);
};
break;
case 'year-field':
type = 'field';
quoteFormatter = function(value) {
return new Date(value).toISOString();
};
valueFormatter = facet.queryValue ? facet.queryValue : function(value) {
return quoteFormatter(getItemKeyAccessor(value));
};
_.each(facet.bins, function(includeValues, key) {
var query = _.map(includeValues, function(includeValue, index) {
return queryField + ':\'' + includeValue + '\'';
}).join(' OR ');
result['facet.query'].push('{!key=' + facetName + ':' + key + ' tag=' + facetName + ':' + key + '}(' + query + ')');
});
break;
case 'field':
valueFormatter = facet.queryValue ? facet.queryValue : function(value) {
return quoteFormatter(getItemKeyAccessor(value));
};
_.each(facet.bins, function(includeValues, key) {
var query = _.map(includeValues, function(includeValue, index) {
return queryField + ':' + includeValue;
}).join(' OR ');
result['facet.query'].push('{!key=' + facetName + ':' + key + ' tag=' + facetName + ':' + key + '}(' + query + ')');
});
break;
}
switch (type) {
case 'range':
facetOptions['facet.range.start'] = facet.rangeStart;
facetOptions['facet.range.end'] = facet.rangeEnd;
facetOptions['facet.range.gap'] = facet.rangeGap;
break;
case 'interval':
facetOptions['facet.interval.set'] = '[*,*]';
break;
}
var facetValues = [];
var queryMax = facet.get('queryMax');
var queryMin = facet.get('queryMin');
if (queryMax !== undefined && queryMin !== undefined) {
facetValues.push(rangeFormatter(queryMin, queryMax));
}
facet.get('items').each(function(item, index) {
if (!item.get('hidden') && item.get('checked')) {
facetValues.push(valueFormatter(item));
}
});
facetOptions.key = facetName;
if (facetValues.length) {
facetOptions.ex = facetName;
result.fq.push('{!tag=' + facetName + '}' + facetField + ':(' + facetValues.join(' OR ') + ')');
} else {
facetOptions.tag = facetName;
}
if (!!options.facetSuggestions) {
var childFacet = options.childFacet;
if (childFacet === facet) {
facetOptions['facet.contains'] = facet.get('query');
facetOptions['facet.contains.ignoreCase'] = true;
facetOptions['facet.mincount'] = 1;
}
}
var facetOptionList = [];
_.each(facetOptions, function(value, key) {
if (value !== undefined) {
facetOptionList.push(key + '=' + value);
}
});
result['facet.' + type].push('{!' + facetOptionList.join(' ') + '}' + queryField);
if (facet.facetStats) {
result['stats.field'].push('{!' + facetOptionList.join(' ') + '}' + queryField);
}
var facetQuery = facet.get('query');
if (facetQuery !== null && facetQuery !== '') {
facetOptions.key = 'suggestions:' + facetName;
facetOptionList = [];
_.each(facetOptions, function(value, key) {
if (value !== undefined) {
facetOptionList.push(key + '=' + value);
}
});
result['facet.' + type].push('{!' + facetOptionList.join(' ') + '}' + queryField);
}
}, this));
return result;
},
toJSON: function toJSON(options) {
if (!!options.facetSuggestions) {
return _.extend({
rows: 0,
facet: true,
wt: 'json',
q: '*:*',
}, this.getFacetFormData(options));
}
},
parse: function parse(data, options) {
if (!!options.facetSuggestions) {
this.applyFacetResults(data, options);
}
return null;
},
}));
Facets.Sort = Sort;
Facets.Facet = Facet;
return Facets;
});