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Filename : to-markdown.js
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var toMarkdown=function(string){var ELEMENTS=[{patterns:'p',replacement:function(str,attrs,innerHTML){return innerHTML?'\n\n'+innerHTML+'\n':'';}},{patterns:'br',type:'void',replacement:'\n'},{patterns:'h([1-6])',replacement:function(str,hLevel,attrs,innerHTML){var hPrefix='';for(var i=0;i<hLevel;i++){hPrefix+='#';}
return '\n\n'+hPrefix+' '+innerHTML+'\n';}},{patterns:'hr',type:'void',replacement:'\n\n* * *\n'},{patterns:'a',replacement:function(str,attrs,innerHTML){var href=attrs.match(attrRegExp('href')),title=attrs.match(attrRegExp('title'));return href?'['+innerHTML+']'+'('+href[1]+(title&&title[1]?' "'+title[1]+'"':'')+')':str;}},{patterns:['b','strong'],replacement:function(str,attrs,innerHTML){return innerHTML?'**'+innerHTML+'**':'';}},{patterns:['i','em'],replacement:function(str,attrs,innerHTML){return innerHTML?'_'+innerHTML+'_':'';}},{patterns:'code',replacement:function(str,attrs,innerHTML){return innerHTML?'`'+innerHTML+'`':'';}},{patterns:'img',type:'void',replacement:function(str,attrs,innerHTML){var src=attrs.match(attrRegExp('src')),alt=attrs.match(attrRegExp('alt')),title=attrs.match(attrRegExp('title'));return '!['+(alt&&alt[1]?alt[1]:'')+']'+'('+src[1]+(title&&title[1]?' "'+title[1]+'"':'')+')';}}];for(var i=0,len=ELEMENTS.length;i<len;i++){if(typeof ELEMENTS[i].patterns==='string'){string=replaceEls(string,{tag:ELEMENTS[i].patterns,replacement:ELEMENTS[i].replacement,type:ELEMENTS[i].type});}
else{for(var j=0,pLen=ELEMENTS[i].patterns.length;j<pLen;j++){string=replaceEls(string,{tag:ELEMENTS[i].patterns[j],replacement:ELEMENTS[i].replacement,type:ELEMENTS[i].type});}}}
function replaceEls(html,elProperties){var pattern=elProperties.type==='void'?'<'+elProperties.tag+'\\b([^>]*)\\/?>':'<'+elProperties.tag+'\\b([^>]*)>([\\s\\S]*?)<\\/'+elProperties.tag+'>',regex=new RegExp(pattern,'gi'),markdown='';if(typeof elProperties.replacement==='string'){markdown=html.replace(regex,elProperties.replacement);}
else{markdown=html.replace(regex,function(str,p1,p2,p3){return elProperties.replacement.call(this,str,p1,p2,p3);});}
return markdown;}
function attrRegExp(attr){return new RegExp(attr+'\\s*=\\s*["\']?([^"\']*)["\']?','i');}
string=string.replace(/<pre\b[^>]*>`([\s\S]*)`<\/pre>/gi,function(str,innerHTML){innerHTML=innerHTML.replace(/^\t+/g,'  ');innerHTML=innerHTML.replace(/\n/g,'\n    ');return '\n\n    '+innerHTML+'\n';});string=string.replace(/^(\s{0,3}\d+)\. /g,'$1\\. ');var noChildrenRegex=/<(ul|ol)\b[^>]*>(?:(?!<ul|<ol)[\s\S])*?<\/\1>/gi;while(string.match(noChildrenRegex)){string=string.replace(noChildrenRegex,function(str){return replaceLists(str);});}
function replaceLists(html){html=html.replace(/<(ul|ol)\b[^>]*>([\s\S]*?)<\/\1>/gi,function(str,listType,innerHTML){var lis=innerHTML.split('</li>');lis.splice(lis.length-1,1);for(i=0,len=lis.length;i<len;i++){if(lis[i]){var prefix=(listType==='ol')?(i+1)+".  ":"*   ";lis[i]=lis[i].replace(/\s*<li[^>]*>([\s\S]*)/i,function(str,innerHTML){innerHTML=innerHTML.replace(/^\s+/,'');innerHTML=innerHTML.replace(/\n\n/g,'\n\n    ');innerHTML=innerHTML.replace(/\n([ ]*)+(\*|\d+\.) /g,'\n$1    $2 ');return prefix+innerHTML;});}}
return lis.join('\n');});return '\n\n'+html.replace(/[ \t]+\n|\s+$/g,'');}
var deepest=/<blockquote\b[^>]*>((?:(?!<blockquote)[\s\S])*?)<\/blockquote>/gi;while(string.match(deepest)){string=string.replace(deepest,function(str){return replaceBlockquotes(str);});}
function replaceBlockquotes(html){html=html.replace(/<blockquote\b[^>]*>([\s\S]*?)<\/blockquote>/gi,function(str,inner){inner=inner.replace(/^\s+|\s+$/g,'');inner=cleanUp(inner);inner=inner.replace(/^/gm,'> ');inner=inner.replace(/^(>([ \t]{2,}>)+)/gm,'> >');return inner;});return html;}
function cleanUp(string){string=string.replace(/^[\t\r\n]+|[\t\r\n]+$/g,'');string=string.replace(/\n\s+\n/g,'\n\n');string=string.replace(/\n{3,}/g,'\n\n');return string;}
return cleanUp(string);};if(typeof exports==='object'){exports.toMarkdown=toMarkdown;}