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Adding in site wide search, crappy but it works!
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,182 @@ | ||
| var JSONSearch = function(options) { | ||
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| this.default_options = { | ||
| fields: {}, | ||
| ranks: {}, | ||
| limit: null, | ||
| offset: 0, | ||
| case_sensitive: false | ||
| }; | ||
|
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| this.patterns = { | ||
| infix: '.*$token.*', | ||
| prefix: '^$token.*', | ||
| exact: '^$token$', | ||
| word: '\\b$token\\b', | ||
| word_prefix: '\\b$token.*' | ||
| }; | ||
|
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| this.query_string = ''; | ||
| this.query_function = "1&&function(object) { var hits = 0, ranks_array = []; #{query_string} if (hits > 0) { return [(ranks_array.sort()[ranks_array.length - 1] || 0), hits, object]; } }"; | ||
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| this.initialize(options); | ||
| }; | ||
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| JSONSearch.InstanceMethods = { | ||
| initialize: function(options) { | ||
| this.options = {}; | ||
| for(var property in this.default_options) { | ||
| this.options[property] = this.default_options[property] | ||
| }; | ||
| for(var property in options) { | ||
| this.options[property] = options[property]; | ||
| } | ||
| this.setAttributes(options); | ||
| this.buildMatcherTemplates(); | ||
| this.buildQueryString(); | ||
| }, | ||
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| setAttributes: function() { | ||
| var args = ['fields', 'limit', 'offset', 'case_sensitive']; | ||
| for(var i = 0; i < args.length; i++) { | ||
| this[args[i]] = this.options[args[i]]; | ||
| }; | ||
| this.ranks = this.getRanks(); | ||
| this.fields_ordered_by_rank = this.fieldsOrderedByRank(); | ||
| }, | ||
|
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| buildMatcherTemplates: function() { | ||
| for(var property in this.patterns) { | ||
| this[property + '_matcher'] = 'if(/' + this.patterns[property] + '/#{regex_options}.test(object["#{name}"])){hits++;ranks_array.push(ranks["#{name}"]);}'; | ||
| }; | ||
| }, | ||
|
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| getRanks: function(object) { | ||
| var ranks = {}; | ||
| for(var property in this.fields) { | ||
| ranks[property] = (this.options.ranks && this.options.ranks[property] || 0); | ||
| }; | ||
| return ranks; | ||
| }, | ||
|
|
||
| // TODO if ranks are all 0 might just use the format order if supplied | ||
| fieldsOrderedByRank: function() { | ||
| var fields_ordered_by_rank = []; | ||
| for(var property in this.ranks){ | ||
| fields_ordered_by_rank.push([this.ranks['property'], property]); | ||
| }; | ||
| fields_ordered_by_rank = fields_ordered_by_rank.sort().reverse(); | ||
| for(var i = 0; i < fields_ordered_by_rank.length; i++) { | ||
| fields_ordered_by_rank[i] = fields_ordered_by_rank[i][1]; | ||
| } | ||
| return fields_ordered_by_rank; | ||
| }, | ||
|
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||
| buildQueryString: function() { | ||
| var query_string_array = [], field; | ||
| for(var i = 0; i < this.fields_ordered_by_rank.length; i++) { | ||
| field = this.fields_ordered_by_rank[i]; | ||
| query_string_array.push(this.buildMatcher(field, this.fields[field])); | ||
| } | ||
| this.query_string = query_string_array.join(''); | ||
| }, | ||
|
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| buildMatcher: function(name, pattern) { | ||
| return this.subMatcher(this[pattern + '_matcher'], { name: name, regex_options: this.getRegexOptions() }); | ||
| }, | ||
|
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| subMatcher: function(matcher, object) { | ||
| var subbed_matcher = matcher; | ||
| for(var property in object) { | ||
| subbed_matcher = subbed_matcher.replace('#{' + property + '}', object[property], 'g') | ||
| } | ||
| return subbed_matcher; | ||
| }, | ||
|
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| subQueryString: function(token) { | ||
| return this.query_string.replace(/\$token/g, this.regexEscape(token)); | ||
| }, | ||
|
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| subQueryFunction: function(object) { | ||
| var subbed_query_function; | ||
| for(var property in object) { | ||
| subbed_query_function = this.query_function.replace('#{' + property + '}', object[property], 'g') | ||
| } | ||
| return subbed_query_function; | ||
| }, | ||
|
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||
| //TODO add an options object to pass limit/offset. | ||
| getResults: function(token, object) { | ||
| object = this.evalJSON(object); | ||
| if (!(object instanceof Array)) { | ||
| object = [object]; | ||
| } | ||
| var results, subbed_query_string = this.subQueryString(token); | ||
| results = this.getFilteredResults(subbed_query_string, object); | ||
| results = this.sortResults(results); | ||
| results = this.limitResults(results); | ||
| return this.cleanResults(results); | ||
| }, | ||
|
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| getFilteredResults: function(query_string, array) { | ||
| var results = [], ranks = this.ranks, result, len = (array.length), query_string = (query_string || ''); | ||
| var query_function = eval(this.subQueryFunction({ query_string: query_string })); | ||
|
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| for(var i = 0; i < len; ++i) { | ||
| if(result = query_function(array[i])) { | ||
| results.push(result); | ||
| } | ||
| } | ||
| return results; | ||
| }, | ||
|
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| sortResults: function(results) { | ||
| return results.sort().reverse(); | ||
| }, | ||
|
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| limitResults: function(results) { | ||
| if (this.limit) { | ||
| return results.slice(this.offset, (this.limit + this.offset)); | ||
| } else if (this.offset > 0) { | ||
| return results.slice(this.offset, (results.length)); | ||
| } else { | ||
| return results; | ||
| } | ||
| }, | ||
|
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| cleanResults: function(results) { | ||
| var clean_results = []; len = (results.length); | ||
| for(var i = 0; i < len; ++i) { | ||
| clean_results.push(results[i][2]); | ||
| } | ||
| return clean_results; | ||
| }, | ||
|
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| evalJSON: function(json) { | ||
| if (typeof json == 'string') { | ||
| try { | ||
| json = eval('(' + json + ')'); | ||
| } catch(e) { | ||
| throw new SyntaxError('Badly formed JSON string'); | ||
| } | ||
| } | ||
| return json; | ||
| }, | ||
|
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| getRegex: function(token, pattern) { | ||
| return new RegExp(this.patterns[pattern].replace(/\$token/, this.regexEscape(token)), this.getRegexOptions()); | ||
| }, | ||
|
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| getRegexOptions: function() { | ||
| return (this.case_sensitive && '' || 'i'); | ||
| }, | ||
|
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| regexEscape: function(string) { | ||
| return String(string).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1'); | ||
| } | ||
| } | ||
|
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| for(var property in JSONSearch.InstanceMethods) { | ||
| JSONSearch.prototype[property] = JSONSearch.InstanceMethods[property] | ||
| } | ||
| delete JSONSearch.InstanceMethods; |
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