stikjs/stik-core

(function( document, stik ){
  stik.createBehavior = function behavior( spec ){
    if ( !spec.name ) { throw "Stik: Behavior name is missing"; }
    if ( spec.name.indexOf(" ") !== -1 ) { throw "Stik: '" + spec.name + "' is not a valid Behavior name. Please replace empty spaces with dashes ('-')"; }
    if ( !spec.executionUnit ) { throw "Stik: Behavior needs a function to use as its execution unit"; }

    var behaviorKey = "data-behaviors";

    spec.bind = function bind( modules ){
      var templates = spec.findTemplates(),
          i = templates.length;

      while ( i-- ) {
        bindWithTemplate(
          templates[ i ]
        ).context.load( spec.executionUnit, modules );
        markAsApplyed( templates[ i ] );
      }

      return templates.length > 0;
    };

    function bindWithTemplate( template ){
      return {
        context: stik.context({
          behavior: spec.behavior,
          template: template
        }),
        executionUnit: spec.executionUnit
      };
    } spec.bindWithTemplate = bindWithTemplate;

    function findTemplates(){
      var selector = "[class*=" + spec.name + "]" +
                     ":not([data-behaviors*=" + spec.name + "])";

      return document.querySelectorAll( selector );
    } spec.findTemplates = findTemplates;

    function resolveDependencies( modules ){
      var injector = stik.injector({
        executionUnit: spec.executionUnit,
        modules: modules
      });

      return injector.resolveDependencies();
    }

    function markAsApplyed( template ){
      var behaviors = template.getAttribute( behaviorKey );
      behaviors = ( ( behaviors || "" ) + " " + spec.name ).trim();

      template.setAttribute( behaviorKey, behaviors ) &
               removeBehaviorClass( template );
    }

    function removeBehaviorClass( template ){
      var regex = new RegExp( "(^|\\s)?" + spec.name + "(\\s|$)", "g" );
      template.className = template.className.replace( regex, " " ).trim();
    }

    return spec;
  };
})( window.document, window.stik );