1 line
31 KiB
JavaScript
1 line
31 KiB
JavaScript
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n=this.events[t].indexOf(e);this.events[t].splice(n,1),this.events[t].length||delete this.events[t]}},t.EventEmitter.prototype.emit=function(t){if(this.hasHandler(t)){var e=Array.prototype.slice.call(arguments,1);this.events[t].forEach(function(t){t.apply(void 0,e)})}},t.EventEmitter.prototype.hasHandler=function(t){return t in this.events},t.tokenizer=function(e){return arguments.length&&null!=e&&void 0!=e?Array.isArray(e)?e.map(function(e){return t.utils.asString(e).toLowerCase()}):e.toString().trim().toLowerCase().split(t.tokenizer.seperator):[]},t.tokenizer.seperator=/[\s\-]+/,t.Pipeline=function(){this._stack=[]},t.Pipeline.registeredFunctions={},t.Pipeline.registerFunction=function(e,n){n in this.registeredFunctions&&t.utils.warn("Overwriting existing registered function: "+n),e.label=n,t.Pipeline.registeredFunctions[e.label]=e},t.Pipeline.warnIfFunctionNotRegistered=function(e){var n=e.label&&e.label in this.registeredFunctions;n||t.utils.warn("Function is not registered with 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e=[],n=t.length,o=this._stack.length,i=0;n>i;i++){for(var r=t[i],s=0;o>s&&(r=this._stack[s](r,i,t),void 0!==r&&""!==r);s++);void 0!==r&&""!==r&&e.push(r)}return e},t.Pipeline.prototype.reset=function(){this._stack=[]},t.Pipeline.prototype.toJSON=function(){return this._stack.map(function(e){return t.Pipeline.warnIfFunctionNotRegistered(e),e.label})},t.Vector=function(){this._magnitude=null,this.list=void 0,this.length=0},t.Vector.Node=function(t,e,n){this.idx=t,this.val=e,this.next=n},t.Vector.prototype.insert=function(e,n){this._magnitude=void 0;var o=this.list;if(!o)return this.list=new t.Vector.Node(e,n,o),this.length++;if(e<o.idx)return this.list=new t.Vector.Node(e,n,o),this.length++;for(var i=o,r=o.next;void 0!=r;){if(e<r.idx)return i.next=new t.Vector.Node(e,n,r),this.length++;i=r,r=r.next}return i.next=new t.Vector.Node(e,n,r),this.length++},t.Vector.prototype.magnitude=function(){if(this._magnitude)return this._magnitude;for(var t,e=this.list,n=0;e;)t=e.val,n+=t*t,e=e.next;return this._magnitude=Math.sqrt(n)},t.Vector.prototype.dot=function(t){for(var e=this.list,n=t.list,o=0;e&&n;)e.idx<n.idx?e=e.next:e.idx>n.idx?n=n.next:(o+=e.val*n.val,e=e.next,n=n.next);return o},t.Vector.prototype.similarity=function(t){return this.dot(t)/(this.magnitude()*t.magnitude())},t.SortedSet=function(){this.length=0,this.elements=[]},t.SortedSet.load=function(t){var e=new this;return e.elements=t,e.length=t.length,e},t.SortedSet.prototype.add=function(){var t,e;for(t=0;t<arguments.length;t++)e=arguments[t],~this.indexOf(e)||this.elements.splice(this.locationFor(e),0,e);this.length=this.elements.length},t.SortedSet.prototype.toArray=function(){return this.elements.slice()},t.SortedSet.prototype.map=function(t,e){return this.elements.map(t,e)},t.SortedSet.prototype.forEach=function(t,e){return this.elements.forEach(t,e)},t.SortedSet.prototype.indexOf=function(t){for(var e=0,n=this.elements.length,o=n-e,i=e+Math.floor(o/2),r=this.elements[i];o>1;){if(r===t)return i;t>r&&(e=i),r>t&&(n=i),o=n-e,i=e+Math.floor(o/2),r=this.elements[i]}return r===t?i:-1},t.SortedSet.prototype.locationFor=function(t){for(var e=0,n=this.elements.length,o=n-e,i=e+Math.floor(o/2),r=this.elements[i];o>1;)t>r&&(e=i),r>t&&(n=i),o=n-e,i=e+Math.floor(o/2),r=this.elements[i];return r>t?i:t>r?i+1:void 0},t.SortedSet.prototype.intersect=function(e){for(var n=new t.SortedSet,o=0,i=0,r=this.length,s=e.length,a=this.elements,c=e.elements;;){if(o>r-1||i>s-1)break;a[o]!==c[i]?a[o]<c[i]?o++:a[o]>c[i]&&i++:(n.add(a[o]),o++,i++)}return n},t.SortedSet.prototype.clone=function(){var e=new t.SortedSet;return e.elements=this.toArray(),e.length=e.elements.length,e},t.SortedSet.prototype.union=function(t){var e,n,o;return this.length>=t.length?(e=this,n=t):(e=t,n=this),o=e.clone(),o.add.apply(o,n.toArray()),o},t.SortedSet.prototype.toJSON=function(){return this.toArray()},t.Index=function(){this._fields=[],this._ref="id",this.pipeline=new t.Pipeline,this.documentStore=new t.Store,this.tokenStore=new t.TokenStore,this.corpusTokens=new t.SortedSet,this.eventEmitter=new t.EventEmitter,this._idfCache={},this.on("add","remove","update",function(){this._idfCache={}}.bind(this))},t.Index.prototype.on=function(){var t=Array.prototype.slice.call(arguments);return this.eventEmitter.addListener.apply(this.eventEmitter,t)},t.Index.prototype.off=function(t,e){return this.eventEmitter.removeListener(t,e)},t.Index.load=function(e){e.version!==t.version&&t.utils.warn("version mismatch: current "+t.version+" importing "+e.version);var n=new this;return n._fields=e.fields,n._ref=e.ref,n.documentStore=t.Store.load(e.documentStore),n.tokenStore=t.TokenStore.load(e.tokenStore),n.corpusTokens=t.SortedSet.load(e.corpusTokens),n.pipeline=t.Pipeline.load(e.pipeline),n},t.Index.prototype.field=function(t,e){var e=e||{},n={name:t,boost:e.boost||1};return this._fields.push(n),this},t.Index.prototype.ref=function(t){return this._ref=t,this},t.Index.prototype.add=function(e,n){var o={},i=new t.SortedSet,r=e[this._ref],n=void 0===n?!0:n;this._fields.forEach(function(n){var r=this.pipeline.run(t.tokenizer(e[n.name]));o[n.name]=r,t.SortedSet.prototype.add.apply(i,r)},this),this.documentStore.set(r,i),t.SortedSet.prototype.add.apply(this.corpusTokens,i.toArray());for(var s=0;s<i.length;s++){var a=i.elements[s],c=this._fields.reduce(function(t,e){var n=o[e.name].length;if(!n)return t;var i=o[e.name].filter(function(t){return t===a}).length;return t+i/n*e.boost},0);this.tokenStore.add(a,{ref:r,tf:c})}n&&this.eventEmitter.emit("add",e,this)},t.Index.prototype.remove=function(t,e){var n=t[this._ref],e=void 0===e?!0:e;if(this.documentStore.has(n)){var o=this.documentStore.get(n);this.documentStore.remove(n),o.forEach(function(t){this.tokenStore.remove(t,n)},this),e&&this.eventEmitter.emit("remove",t,this)}},t.Index.prototype.update=function(t,e){var e=void 0===e?!0:e;this.remove(t,!1),this.add(t,!1),e&&this.eventEmitter.emit("update",t,this)},t.Index.prototype.idf=function(t){var e="@"+t;if(Object.prototype.hasOwnProperty.call(this._idfCache,e))return this._idfCache[e];var n=this.tokenStore.count(t),o=1;return n>0&&(o=1+Math.log(this.documentStore.length/n)),this._idfCache[e]=o},t.Index.prototype.search=function(e){var n=this.pipeline.run(t.tokenizer(e)),o=new t.Vector,i=[],r=this._fields.reduce(function(t,e){return t+e.boost},0),s=n.some(function(t){return this.tokenStore.has(t)},this);if(!s)return[];n.forEach(function(e,n,s){var a=1/s.length*this._fields.length*r,c=this,l=this.tokenStore.expand(e).reduce(function(n,i){var r=c.corpusTokens.indexOf(i),s=c.idf(i),l=1,u=new t.SortedSet;if(i!==e){var 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