Added error handles, sections, updated url resolving, use book.request for requests

lib/epubjs/section.js

@@ -0,0 +1,81 @@
+EPUBJS.Section = function(item){
+    this.idref = item.idref;
+    this.linear = item.linear;
+    this.properties = item.properties;
+    this.index = item.index;
+    this.href = item.href;
+    this.url = item.url;
+    this.cfiBase = item.cfiBase;
+
+    this.hooks = {};
+    this.hooks.replacements = new EPUBJS.Hook(this);
+
+    // Register replacements
+    this.hooks.replacements.register(this.replacements);
+};
+
+
+EPUBJS.Section.prototype.load = function(_request){
+  var request = _request || this.request || EPUBJS.core.request;
+  var loading = new RSVP.defer();
+  var loaded = loading.promise;
+
+  if(this.contents) {
+    loading.resolve(this.contents);
+  } else {
+    request(this.url, 'xml')
+      .then(function(xml){
+        var base;
+        var directory = EPUBJS.core.folder(this.url);
+
+        this.document = xml;
+        this.contents = xml.documentElement;
+
+        return this.hooks.replacements.trigger(this.document);
+      }.bind(this))
+      .then(function(){
+        loading.resolve(this.contents);
+      }.bind(this))
+      .catch(function(error){
+        loading.reject(error);
+      });
+  }
+  
+  return loaded;
+};
+
+EPUBJS.Section.prototype.replacements = function(_document){
+    var task = new RSVP.defer();
+    var base = _document.createElement("base"); // TODO: check if exists
+    
+    base.setAttribute("href", this.url);
+    _document.head.insertBefore(base, _document.head.firstChild);
+    
+    task.resolve();
+
+    return task.promise;
+};
+
+EPUBJS.Section.prototype.beforeSectionLoad = function(){
+  // Stub for a hook - replace me for now
+}
+
+EPUBJS.Section.prototype.render = function(_request){
+  var rendering = new RSVP.defer();
+  var rendered = rendering.promise;
+  
+  this.load(_request).then(function(contents){
+    var serializer = new XMLSerializer();
+    var output = serializer.serializeToString(contents);
+    rendering.resolve(output);
+  })
+  .catch(function(error){
+    rendering.reject(error);
+  });
+
+  return rendered;
+};
+
+EPUBJS.Section.prototype.find = function(_query){
+
+};