memex/docs/logic/lib/runic.js

function Runic(raw)
{
  this.raw = raw;

  this.runes = {
    "&":{glyph:"&",tag:"p",class:""},
    "~":{glyph:"~",tag:"list",sub:"ln",class:"parent",stash:true},
    "-":{glyph:"-",tag:"list",sub:"ln",class:"",stash:true},
    "=":{glyph:"=",tag:"list",sub:"ln",class:"mini",stash:true},
    "!":{glyph:"!",tag:"table",sub:"tr",wrap:"th",class:"outline",stash:true},
    "|":{glyph:"|",tag:"table",sub:"tr",wrap:"td",class:"outline",stash:true},
    "#":{glyph:"#",tag:"code",sub:"ln",class:"",stash:true},
    "%":{glyph:"%"}, // media
    "?":{glyph:"?",tag:"note",class:""},
    ":":{glyph:":",tag:"info",class:""},
    "*":{glyph:"*",tag:"h3",class:""},
    ">":{glyph:">",tag:"",class:""},
    "@":{glyph:"@",tag:"quote",class:""}
  }

  this.stash = {
    rune : "",
    all : [],
    add : function(rune,item){
      this.rune = this.copy(rune)
      this.all.push({rune:rune,item:item});
    },
    pop : function(){
      var copy = this.copy(this.all);
      this.all = [];
      return copy;
    },
    is_pop : function(rune){
      return this.all.length > 0 && rune.tag != this.rune.tag;
    },
    length: function()
    {
      return this.all.length;
    },
    copy : function(data){ 
      return JSON.parse(JSON.stringify(data)); 
    }
  }

  this.parse = function(raw = this.raw)
  {
    if(!raw){ return ""; }

    var html = "";
    var lines = raw;
    var lines = !Array.isArray(raw) ? raw.split("\n") : raw;

    for(id in lines){
      var char = lines[id].substr(0,1).trim().toString()
      var rune = this.runes[char];
      var trail = lines[id].substr(1,1);
      if(char == "%"){ html += this.media(lines[id].substr(2)); continue; }
      if(char == "@"){ html += this.quote(lines[id].substr(2)); continue; }
      var line = lines[id].substr(2).to_markup();
      if(!line || line.trim() == ""){ continue; }
      if(!rune){ console.log(`Unknown rune:${char} : ${line}`); }
      if(trail != " "){ console.warn("Runic","Non-rune["+trail+"] at:"+id+"("+line+")"); continue; }

      if(this.stash.is_pop(rune)){ html += this.render_stash(); }
      if(rune.stash === true){ this.stash.add(rune,line) ; continue; }
      html += this.render(line,rune);
    }
    if(this.stash.length() > 0){ html += this.render_stash(); }
    return html;
  }

  this.render_stash = function()
  {
    var rune = this.stash.rune;
    var stash = this.stash.pop();

    var html = "";
    for(id in stash){
      var rune = stash[id].rune;
      var line = stash[id].item;
      html += rune.wrap ? `<${rune.sub}><${rune.wrap}>${line.replace(/\|/g,`</${rune.wrap}><${rune.wrap}>`).trim()}</${rune.wrap}></${rune.sub}>` : `<${rune.sub}>${line}</${rune.sub}>`;  
    }
    return `<${rune.tag} class='${rune.class}'>${html}</${rune.tag}>`
  }

  this.render = function(line = "",rune = null)
  {
    if(rune && rune.tag == "img"){ return `<img src='media/${line}'/>`; }
    if(rune && rune.tag == "table"){ return "HEY"; }

    return rune ? (rune.tag ? `<${rune.tag} class='${rune.class}'>${line}</${rune.tag}>` : line) : "";
  }

  this.media = function(val)
  {
    var service = val.split(" ")[0];
    var id = val.split(" ")[1];

    if(service == "itchio"){
      return `<iframe frameborder="0" src="https://itch.io/embed/${id}?link_color=000000" width="600" height="167"></iframe>`;
    }
    if(service == "bandcamp"){
      return `<iframe style="border: 0; width: 600px; height: 274px;" src="https://bandcamp.com/EmbeddedPlayer/album=${id}/size=large/bgcol=ffffff/linkcol=333333/artwork=small/transparent=true/" seamless></iframe>`;
    }
    if(service == "youtube"){
      return `<iframe width="600" height="315" src="https://www.youtube.com/embed/${id}" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>`;
    }
    if(service == "custom"){
      return `<iframe src='${id}' style='width:100%;height:350px;'></iframe>`;
    }
    return `<img src='media/${service}' class='${id}'/>`
  }

  this.quote = function(content)
  {
    var parts = content.split(" | ")
    var text = parts[0]
    var author = parts[1]
    var source = parts[2]
    var link = parts[3]

    return `<quote><p class='text'>${text}</p>${author ? `<p class='attrib'>${link ? `${author}, <a href='${link}'>${source}</a>` : `${author}`}</p>` : ''}</quote>`
  }

  this.html = function()
  {
    return this.parse(raw);
  }

  this.toString = function()
  {
    return this.html();
  }
}

String.prototype.capitalize = function()
{
  return this.charAt(0).toUpperCase() + this.slice(1).toLowerCase();
}

String.prototype.to_url = function()
{
  return this.toLowerCase().replace(/ /g,"+").replace(/[^0-9a-z\+]/gi,"").trim();
}

String.prototype.to_path = function()
{
  return this.toLowerCase().replace(/ /g,".").replace(/[^0-9a-z\.]/gi,"").trim();
}

String.prototype.to_markup = function()
{
  html = this;
  html = html.replace(/{_/g,"<i>").replace(/_}/g,"</i>")
  html = html.replace(/{\*/g,"<b>").replace(/\*}/g,"</b>")
  html = html.replace(/{\#/g,"<code class='inline'>").replace(/\#}/g,"</code>")

  var parts = html.split("{{")
  for(id in parts){
    var part = parts[id];
    if(part.indexOf("}}") == -1){ continue; }
    var content = part.split("}}")[0];
    var target = content.indexOf("|") > -1 ? content.split("|")[1] : content;
    var name = content.indexOf("|") > -1 ? content.split("|")[0] : content;
    var external = (target.indexOf("https:") > -1 || target.indexOf("http:") > -1 || target.indexOf("dat:") > -1);
    html = html.replace(`{{${content}}}`,external ? `<a href='${target}' class='external' target='_blank'>${name}</a>` : `<a class='local' href='#${target.to_url()}'>${name}</a>`)
  }
  return html;
}