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e=[],t=[{prefix:"",node:this}];t.length;){var n=t.pop(),r=Object.keys(n.node.edges),o=r.length;n.node.final&&(n.prefix.charAt(0),e.push(n.prefix));for(var i=0;i<o;i++){var a=r[i];t.push({prefix:n.prefix.concat(a),node:n.node.edges[a]})}}return e},I.TokenSet.prototype.toString=function(){if(this._str)return this._str;for(var e=this.final?"1":"0",t=Object.keys(this.edges).sort(),n=t.length,r=0;r<n;r++){var o=t[r];e=e+o+this.edges[o].id}return e},I.TokenSet.prototype.intersect=function(e){for(var t=new I.TokenSet,n=void 0,r=[{qNode:e,output:t,node:this}];r.length;){n=r.pop();for(var o=Object.keys(n.qNode.edges),i=o.length,a=Object.keys(n.node.edges),l=a.length,s=0;s<i;s++)for(var u=o[s],c=0;c<l;c++){var d=a[c];if(d==u||"*"==u){var f=n.node.edges[d],p=n.qNode.edges[u],h=f.final&&p.final,m=void 0;d in n.output.edges?(m=n.output.edges[d]).final=m.final||h:((m=new I.TokenSet).final=h,n.output.edges[d]=m),r.push({qNode:p,output:m,node:f})}}}return t},I.TokenSet.Builder=function(){this.previousWord="",this.root=new I.TokenSet,this.uncheckedNodes=[],this.minimizedNodes={}},I.TokenSet.Builder.prototype.insert=function(e){var t,n=0;if(e<this.previousWord)throw new Error("Out of order word insertion");for(var r=0;r<e.length&&r<this.previousWord.length&&e[r]==this.previousWord[r];r++)n++;this.minimize(n),t=0==this.uncheckedNodes.length?this.root:this.uncheckedNodes[this.uncheckedNodes.length-1].child;for(r=n;r<e.length;r++){var o=new I.TokenSet,i=e[r];t.edges[i]=o,this.uncheckedNodes.push({parent:t,char:i,child:o}),t=o}t.final=!0,this.previousWord=e},I.TokenSet.Builder.prototype.finish=function(){this.minimize(0)},I.TokenSet.Builder.prototype.minimize=function(e){for(var t=this.uncheckedNodes.length-1;t>=e;t--){var n=this.uncheckedNodes[t],r=n.child.toString();r in this.minimizedNodes?n.parent.edges[n.char]=this.minimizedNodes[r]:(n.child._str=r,this.minimizedNodes[r]=n.child),this.uncheckedNodes.pop()}},I.Index=function(e){this.invertedIndex=e.invertedIndex,this.fieldVectors=e.fieldVectors,this.tokenSet=e.tokenSet,this.fields=e.fields,this.pipeline=e.pipeline},I.Index.prototype.search=function(e){return this.query((function(t){new I.QueryParser(e,t).parse()}))},I.Index.prototype.query=function(e){for(var t=new I.Query(this.fields),n=Object.create(null),r=Object.create(null),o=Object.create(null),i=Object.create(null),a=Object.create(null),l=0;l<this.fields.length;l++)r[this.fields[l]]=new I.Vector;e.call(t,t);for(l=0;l<t.clauses.length;l++){var s=t.clauses[l],u=null,c=I.Set.complete;u=s.usePipeline?this.pipeline.runString(s.term,{fields:s.fields}):[s.term];for(var d=0;d<u.length;d++){var f=u[d];s.term=f;var p=I.TokenSet.fromClause(s),h=this.tokenSet.intersect(p).toArray();if(0===h.length&&s.presence===I.Query.presence.REQUIRED){for(var m=0;m<s.fields.length;m++){i[C=s.fields[m]]=I.Set.empty}break}for(var y=0;y<h.length;y++){var v=h[y],g=this.invertedIndex[v],b=g._index;for(m=0;m<s.fields.length;m++){var w=g[C=s.fields[m]],x=Object.keys(w),O=v+"/"+C,k=new I.Set(x);if(s.presence==I.Query.presence.REQUIRED&&(c=c.union(k),void 0===i[C]&&(i[C]=I.Set.complete)),s.presence!=I.Query.presence.PROHIBITED){if(r[C].upsert(b,s.boost,(function(e,t){return e+t})),!o[O]){for(var P=0;P<x.length;P++){var j,S=x[P],E=new I.FieldRef(S,C),L=w[S];void 0===(j=n[E])?n[E]=new I.MatchData(v,C,L):j.add(v,C,L)}o[O]=!0}}else void 0===a[C]&&(a[C]=I.Set.empty),a[C]=a[C].union(k)}}}if(s.presence===I.Query.presence.REQUIRED)for(m=0;m<s.fields.length;m++){i[C=s.fields[m]]=i[C].intersect(c)}}var _=I.Set.complete,T=I.Set.empty;for(l=0;l<this.fields.length;l++){var C;i[C=this.fields[l]]&&(_=_.intersect(i[C])),a[C]&&(T=T.union(a[C]))}var A=Object.keys(n),Q=[],M=Object.create(null);if(t.isNegated()){A=Object.keys(this.fieldVectors);for(l=0;l<A.length;l++){E=A[l];var R=I.FieldRef.fromString(E);n[E]=new I.MatchData}}for(l=0;l<A.length;l++){var D=(R=I.FieldRef.fromString(A[l])).docRef;if(_.contains(D)&&!T.contains(D)){var F,N=this.fieldVectors[R],H=r[R.fieldName].similarity(N);if(void 0!==(F=M[D]))F.score+=H,F.matchData.combine(n[R]);else{var q={ref:D,score:H,matchData:n[R]};M[D]=q,Q.push(q)}}}return Q.sort((function(e,t){return t.score-e.score}))},I.Index.prototype.toJSON=function(){var e=Object.keys(this.invertedIndex).sort().map((function(e){return[e,this.invertedIndex[e]]}),this),t=Object.keys(this.fieldVectors).map((function(e){return[e,this.fieldVectors[e].toJSON()]}),this);return{version:I.version,fields:this.fields,fieldVectors:t,invertedIndex:e,pipeline:this.pipeline.toJSON()}},I.Index.load=function(e){var t={},n={},r=e.fieldVectors,o=Object.create(null),i=e.invertedIndex,a=new I.TokenSet.Builder,l=I.Pipeline.load(e.pipeline);e.version!=I.version&&I.utils.warn("Version mismatch when loading serialised index. Current version of lunr '"+I.version+"' does not match serialized index '"+e.version+"'");for(var s=0;s<r.length;s++){var u=(d=r[s])[0],c=d[1];n[u]=new I.Vector(c)}for(s=0;s<i.length;s++){var d,f=(d=i[s])[0],p=d[1];a.insert(f),o[f]=p}return a.finish(),t.fields=e.fields,t.fieldVectors=n,t.invertedIndex=o,t.tokenSet=a.root,t.pipeline=l,new I.Index(t)},I.Builder=function(){this._ref="id",this._fields=Object.create(null),this._documents=Object.create(null),this.invertedIndex=Object.create(null),this.fieldTermFrequencies={},this.fieldLengths={},this.tokenizer=I.tokenizer,this.pipeline=new I.Pipeline,this.searchPipeline=new I.Pipeline,this.documentCount=0,this._b=.75,this._k1=1.2,this.termIndex=0,this.metadataWhitelist=[]},I.Builder.prototype.ref=function(e){this._ref=e},I.Builder.prototype.field=function(e,t){if(/\//.test(e))throw new RangeError("Field '"+e+"' contains illegal character '/'");this._fields[e]=t||{}},I.Builder.prototype.b=function(e){this._b=e<0?0:e>1?1:e},I.Builder.prototype.k1=function(e){this._k1=e},I.Builder.prototype.add=function(e,t){var n=e[this._ref],r=Object.keys(this._fields);this._documents[n]=t||{},this.documentCount+=1;for(var o=0;o<r.length;o++){var i=r[o],a=this._fields[i].extractor,l=a?a(e):e[i],s=this.tokenizer(l,{fields:[i]}),u=this.pipeline.run(s),c=new I.FieldRef(n,i),d=Object.create(null);this.fieldTermFrequencies[c]=d,this.fieldLengths[c]=0,this.fieldLengths[c]+=u.length;for(var f=0;f<u.length;f++){var p=u[f];if(null==d[p]&&(d[p]=0),d[p]+=1,null==this.invertedIndex[p]){var h=Object.create(null);h._index=this.termIndex,this.termIndex+=1;for(var m=0;m<r.length;m++)h[r[m]]=Object.create(null);this.invertedIndex[p]=h}null==this.invertedIndex[p][i][n]&&(this.invertedIndex[p][i][n]=Object.create(null));for(var y=0;y<this.metadataWhitelist.length;y++){var v=this.metadataWhitelist[y],g=p.metadata[v];null==this.invertedIndex[p][i][n][v]&&(this.invertedIndex[p][i][n][v]=[]),this.invertedIndex[p][i][n][v].push(g)}}}},I.Builder.prototype.calculateAverageFieldLengths=function(){for(var e=Object.keys(this.fieldLengths),t=e.length,n={},r={},o=0;o<t;o++){var i=I.FieldRef.fromString(e[o]),a=i.fieldName;r[a]||(r[a]=0),r[a]+=1,n[a]||(n[a]=0),n[a]+=this.fieldLengths[i]}var l=Object.keys(this._fields);for(o=0;o<l.length;o++){var s=l[o];n[s]=n[s]/r[s]}this.averageFieldLength=n},I.Builder.prototype.createFieldVectors=function(){for(var e={},t=Object.keys(this.fieldTermFrequencies),n=t.length,r=Object.create(null),o=0;o<n;o++){for(var i=I.FieldRef.fromString(t[o]),a=i.fieldName,l=this.fieldLengths[i],s=new I.Vector,u=this.fieldTermFrequencies[i],c=Object.keys(u),d=c.length,f=this._fields[a].boost||1,p=this._documents[i.docRef].boost||1,h=0;h<d;h++){var m,y,v,g=c[h],b=u[g],w=this.invertedIndex[g]._index;void 0===r[g]?(m=I.idf(this.invertedIndex[g],this.documentCount),r[g]=m):m=r[g],y=m*((this._k1+1)*b)/(this._k1*(1-this._b+this._b*(l/this.averageFieldLength[a]))+b),y*=f,y*=p,v=Math.round(1e3*y)/1e3,s.insert(w,v)}e[i]=s}this.fieldVectors=e},I.Builder.prototype.createTokenSet=function(){this.tokenSet=I.TokenSet.fromArray(Object.keys(this.invertedIndex).sort())},I.Builder.prototype.build=function(){return this.calculateAverageFieldLengths(),this.createFieldVectors(),this.createTokenSet(),new I.Index({invertedIndex:this.invertedIndex,fieldVectors:this.fieldVectors,tokenSet:this.tokenSet,fields:Object.keys(this._fields),pipeline:this.searchPipeline})},I.Builder.prototype.use=function(e){var t=Array.prototype.slice.call(arguments,1);t.unshift(this),e.apply(this,t)},I.MatchData=function(e,t,n){for(var r=Object.create(null),o=Object.keys(n||{}),i=0;i<o.length;i++){var a=o[i];r[a]=n[a].slice()}this.metadata=Object.create(null),void 0!==e&&(this.metadata[e]=Object.create(null),this.metadata[e][t]=r)},I.MatchData.prototype.combine=function(e){for(var t=Object.keys(e.metadata),n=0;n<t.length;n++){var r=t[n],o=Object.keys(e.metadata[r]);null==this.metadata[r]&&(this.metadata[r]=Object.create(null));for(var i=0;i<o.length;i++){var a=o[i],l=Object.keys(e.metadata[r][a]);null==this.metadata[r][a]&&(this.metadata[r][a]=Object.create(null));for(var s=0;s<l.length;s++){var u=l[s];null==this.metadata[r][a][u]?this.metadata[r][a][u]=e.metadata[r][a][u]:this.metadata[r][a][u]=this.metadata[r][a][u].concat(e.metadata[r][a][u])}}}},I.MatchData.prototype.add=function(e,t,n){if(!(e in this.metadata))return this.metadata[e]=Object.create(null),void(this.metadata[e][t]=n);if(t in this.metadata[e])for(var r=Object.keys(n),o=0;o<r.length;o++){var i=r[o];i in this.metadata[e][t]?this.metadata[e][t][i]=this.metadata[e][t][i].concat(n[i]):this.metadata[e][t][i]=n[i]}else this.metadata[e][t]=n},I.Query=function(e){this.clauses=[],this.allFields=e},I.Query.wildcard=new String("*"),I.Query.wildcard.NONE=0,I.Query.wildcard.LEADING=1,I.Query.wildcard.TRAILING=2,I.Query.presence={OPTIONAL:1,REQUIRED:2,PROHIBITED:3},I.Query.prototype.clause=function(e){return"fields"in e||(e.fields=this.allFields),"boost"in e||(e.boost=1),"usePipeline"in e||(e.usePipeline=!0),"wildcard"in e||(e.wildcard=I.Query.wildcard.NONE),e.wildcard&I.Query.wildcard.LEADING&&e.term.charAt(0)!=I.Query.wildcard&&(e.term="*"+e.term),e.wildcard&I.Query.wildcard.TRAILING&&e.term.slice(-1)!=I.Query.wildcard&&(e.term=e.term+"*"),"presence"in e||(e.presence=I.Query.presence.OPTIONAL),this.clauses.push(e),this},I.Query.prototype.isNegated=function(){for(var e=0;e<this.clauses.length;e++)if(this.clauses[e].presence!=I.Query.presence.PROHIBITED)return!1;return!0},I.Query.prototype.term=function(e,t){if(Array.isArray(e))return e.forEach((function(e){this.term(e,I.utils.clone(t))}),this),this;var n=t||{};return n.term=e.toString(),this.clause(n),this},I.QueryParseError=function(e,t,n){this.name="QueryParseError",this.message=e,this.start=t,this.end=n},I.QueryParseError.prototype=new Error,I.QueryLexer=function(e){this.lexemes=[],this.str=e,this.length=e.length,this.pos=0,this.start=0,this.escapeCharPositions=[]},I.QueryLexer.prototype.run=function(){for(var e=I.QueryLexer.lexText;e;)e=e(this)},I.QueryLexer.prototype.sliceString=function(){for(var e=[],t=this.start,n=this.pos,r=0;r<this.escapeCharPositions.length;r++)n=this.escapeCharPositions[r],e.push(this.str.slice(t,n)),t=n+1;return e.push(this.str.slice(t,this.pos)),this.escapeCharPositions.length=0,e.join("")},I.QueryLexer.prototype.emit=function(e){this.lexemes.push({type:e,str:this.sliceString(),start:this.start,end:this.pos}),this.start=this.pos},I.QueryLexer.prototype.escapeCharacter=function(){this.escapeCharPositions.push(this.pos-1),this.pos+=1},I.QueryLexer.prototype.next=function(){if(this.pos>=this.length)return I.QueryLexer.EOS;var e=this.str.charAt(this.pos);return this.pos+=1,e},I.QueryLexer.prototype.width=function(){return this.pos-this.start},I.QueryLexer.prototype.ignore=function(){this.start==this.pos&&(this.pos+=1),this.start=this.pos},I.QueryLexer.prototype.backup=function(){this.pos-=1},I.QueryLexer.prototype.acceptDigitRun=function(){var e,t;do{t=(e=this.next()).charCodeAt(0)}while(t>47&&t<58);e!=I.QueryLexer.EOS&&this.backup()},I.QueryLexer.prototype.more=function(){return this.pos<this.length},I.QueryLexer.EOS="EOS",I.QueryLexer.FIELD="FIELD",I.QueryLexer.TERM="TERM",I.QueryLexer.EDIT_DISTANCE="EDIT_DISTANCE",I.QueryLexer.BOOST="BOOST",I.QueryLexer.PRESENCE="PRESENCE",I.QueryLexer.lexField=function(e){return e.backup(),e.emit(I.QueryLexer.FIELD),e.ignore(),I.QueryLexer.lexText},I.QueryLexer.lexTerm=function(e){if(e.width()>1&&(e.backup(),e.emit(I.QueryLexer.TERM)),e.ignore(),e.more())return I.QueryLexer.lexText},I.QueryLexer.lexEditDistance=function(e){return e.ignore(),e.acceptDigitRun(),e.emit(I.QueryLexer.EDIT_DISTANCE),I.QueryLexer.lexText},I.QueryLexer.lexBoost=function(e){return e.ignore(),e.acceptDigitRun(),e.emit(I.QueryLexer.BOOST),I.QueryLexer.lexText},I.QueryLexer.lexEOS=function(e){e.width()>0&&e.emit(I.QueryLexer.TERM)},I.QueryLexer.termSeparator=I.tokenizer.separator,I.QueryLexer.lexText=function(e){for(;;){var t=e.next();if(t==I.QueryLexer.EOS)return I.QueryLexer.lexEOS;if(92!=t.charCodeAt(0)){if(":"==t)return I.QueryLexer.lexField;if("~"==t)return e.backup(),e.width()>0&&e.emit(I.QueryLexer.TERM),I.QueryLexer.lexEditDistance;if("^"==t)return e.backup(),e.width()>0&&e.emit(I.QueryLexer.TERM),I.QueryLexer.lexBoost;if("+"==t&&1===e.width())return e.emit(I.QueryLexer.PRESENCE),I.QueryLexer.lexText;if("-"==t&&1===e.width())return e.emit(I.QueryLexer.PRESENCE),I.QueryLexer.lexText;if(t.match(I.QueryLexer.termSeparator))return I.QueryLexer.lexTerm}else e.escapeCharacter()}},I.QueryParser=function(e,t){this.lexer=new I.QueryLexer(e),this.query=t,this.currentClause={},this.lexemeIdx=0},I.QueryParser.prototype.parse=function(){this.lexer.run(),this.lexemes=this.lexer.lexemes;for(var e=I.QueryParser.parseClause;e;)e=e(this);return this.query},I.QueryParser.prototype.peekLexeme=function(){return this.lexemes[this.lexemeIdx]},I.QueryParser.prototype.consumeLexeme=function(){var e=this.peekLexeme();return this.lexemeIdx+=1,e},I.QueryParser.prototype.nextClause=function(){var e=this.currentClause;this.query.clause(e),this.currentClause={}},I.QueryParser.parseClause=function(e){var t=e.peekLexeme();if(null!=t)switch(t.type){case I.QueryLexer.PRESENCE:return I.QueryParser.parsePresence;case I.QueryLexer.FIELD:return I.QueryParser.parseField;case I.QueryLexer.TERM:return I.QueryParser.parseTerm;default:var n="expected either a field or a term, found "+t.type;throw t.str.length>=1&&(n+=" with value '"+t.str+"'"),new I.QueryParseError(n,t.start,t.end)}},I.QueryParser.parsePresence=function(e){var t=e.consumeLexeme();if(null!=t){switch(t.str){case"-":e.currentClause.presence=I.Query.presence.PROHIBITED;break;case"+":e.currentClause.presence=I.Query.presence.REQUIRED;break;default:var n="unrecognised presence operator'"+t.str+"'";throw new I.QueryParseError(n,t.start,t.end)}var r=e.peekLexeme();if(null==r){n="expecting term or field, found nothing";throw new I.QueryParseError(n,t.start,t.end)}switch(r.type){case I.QueryLexer.FIELD:return I.QueryParser.parseField;case I.QueryLexer.TERM:return I.QueryParser.parseTerm;default:n="expecting term or field, found '"+r.type+"'";throw new I.QueryParseError(n,r.start,r.end)}}},I.QueryParser.parseField=function(e){var t=e.consumeLexeme();if(null!=t){if(-1==e.query.allFields.indexOf(t.str)){var n=e.query.allFields.map((function(e){return"'"+e+"'"})).join(", "),r="unrecognised field '"+t.str+"', possible fields: "+n;throw new I.QueryParseError(r,t.start,t.end)}e.currentClause.fields=[t.str];var o=e.peekLexeme();if(null==o){r="expecting term, found nothing";throw new I.QueryParseError(r,t.start,t.end)}switch(o.type){case I.QueryLexer.TERM:return I.QueryParser.parseTerm;default:r="expecting term, found '"+o.type+"'";throw new I.QueryParseError(r,o.start,o.end)}}},I.QueryParser.parseTerm=function(e){var t=e.consumeLexeme();if(null!=t){e.currentClause.term=t.str.toLowerCase(),-1!=t.str.indexOf("*")&&(e.currentClause.usePipeline=!1);var n=e.peekLexeme();if(null!=n)switch(n.type){case I.QueryLexer.TERM:return e.nextClause(),I.QueryParser.parseTerm;case I.QueryLexer.FIELD:return e.nextClause(),I.QueryParser.parseField;case I.QueryLexer.EDIT_DISTANCE:return I.QueryParser.parseEditDistance;case I.QueryLexer.BOOST:return I.QueryParser.parseBoost;case I.QueryLexer.PRESENCE:return e.nextClause(),I.QueryParser.parsePresence;default:var r="Unexpected lexeme type '"+n.type+"'";throw new I.QueryParseError(r,n.start,n.end)}else e.nextClause()}},I.QueryParser.parseEditDistance=function(e){var t=e.consumeLexeme();if(null!=t){var n=parseInt(t.str,10);if(isNaN(n)){var r="edit distance must be numeric";throw new I.QueryParseError(r,t.start,t.end)}e.currentClause.editDistance=n;var o=e.peekLexeme();if(null!=o)switch(o.type){case I.QueryLexer.TERM:return e.nextClause(),I.QueryParser.parseTerm;case I.QueryLexer.FIELD:return e.nextClause(),I.QueryParser.parseField;case I.QueryLexer.EDIT_DISTANCE:return I.QueryParser.parseEditDistance;case I.QueryLexer.BOOST:return I.QueryParser.parseBoost;case I.QueryLexer.PRESENCE:return e.nextClause(),I.QueryParser.parsePresence;default:r="Unexpected lexeme type '"+o.type+"'";throw new I.QueryParseError(r,o.start,o.end)}else e.nextClause()}},I.QueryParser.parseBoost=function(e){var t=e.consumeLexeme();if(null!=t){var n=parseInt(t.str,10);if(isNaN(n)){var r="boost must be numeric";throw new I.QueryParseError(r,t.start,t.end)}e.currentClause.boost=n;var o=e.peekLexeme();if(null!=o)switch(o.type){case I.QueryLexer.TERM:return e.nextClause(),I.QueryParser.parseTerm;case 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