[FormatInterface] Add functions from FormatAbstract

FormatInterface.md

@@ -1,21 +1,18 @@
 The `FormatInterface`interface defines functions that need to be implemented by all formats:
 
-* [setItems](#the-setitems-function)
 * [display](#the-display-function)
 * [stringify](#the-stringify-function)
+* [setItems](#the-setitems-function)
+* [getItems](#the-getitems-function)
+* [setCharset](#the-setcharset-function)
+* [getCharset](#the-getcharset-function)
+* [setExtraInfos](#the-setextrainfos-function)
+* [getExtraInfos](#the-getextrainfos-function)
 
 Find a [template](#template) at the end of this file
 
 #Functions
 
-##The `setItems` function
-
-The `setItems` function receives an array of items generated by the bridge and must return the object instance. Each item represents an entry in the feed. For more information refer to [BridgeAbstract](BridgeAbstract#items).
-
-```PHP
-setItems(array $items): self
-```
-
 ##The `display` function
 
 The `display` function shows the contents to the user and must return the object instance.
@@ -32,6 +29,61 @@ The `stringify` function returns the items received by [`setItems`](#the-setitem
 stringify(): string
 ```
 
+##The `setItems` function
+
+The `setItems` function receives an array of items generated by the bridge and must return the object instance. Each item represents an entry in the feed. For more information refer to [BridgeAbstract](BridgeAbstract#items).
+
+```PHP
+setItems(array $items): self
+```
+
+##The `getItems` function
+
+The `getItems` function returns the items previously set by the [`setItems`](FormatInterface#the-setitems-function) function. If no items where set previously this function returns an error.
+
+```PHP
+getItems(): array
+```
+
+##The `setCharset` function
+
+The `setCharset` function receives the character set value as string and returns the object instance.
+
+```PHP
+setCharset(string): self
+```
+
+##The `getCharset` function
+
+The `getCharset` function returns the character set value.
+
+```PHP
+getCharset(): string
+```
+
+##The `setExtraInfos` function
+
+The `setExtraInfos` function receives an array of elements with additional information to generate format outputs and must return the object instance.
+
+```PHP
+setExtraInfos(array $infos): self
+```
+
+Currently supported information are:
+
+Name | Description
+-----|------------
+`name` | Defines the name as generated by the bridge
+`uri` | Defines the URI of the feed as generated by the bridge
+
+##The `getExtraInfos` function
+
+The `getExtraInfos` function returns the information previously set via the [`setExtraInfos`](#the-setextrainfos-function) function.
+
+```PHP
+getExtraInfos(): array
+```
+
 #Template
 
 This is a bare minimum template for a format:
@@ -39,14 +91,9 @@ This is a bare minimum template for a format:
 ```PHP
 <?php
 class MyTypeFormat implements FormatInterface {
-    public function setItems(array $items){
-        // Implement your code here!
-        return $this;
-    }
-
     public function stringify(){
         // Implement your code here
-        return '';
+        return ''; // Return items as string
     }
 
     public function display(){
@@ -54,6 +101,36 @@ class MyTypeFormat implements FormatInterface {
         echo $this->stringify();
         return $this;
     }
+
+    public function setItems(array $items){
+        // Implement your code here!
+        return $this;
+    }
+
+    public function getItems(){
+        // Implement your code here!
+        return array(); // Return original items
+    }
+
+    public function setCharset($charset){
+        // Implement your code here!
+        return $this;
+    }
+
+    public function getCharset(){
+        // Implement your code here!
+        return ''; // Return the charset!
+    }
+
+    public function setExtraInfos(array $infos){
+        // Implement your code here!
+        return $this;
+    }
+
+    public function getExtraInfos(){
+        // Implement your code here!
+        return array(); // Return the original infos!
+    }
 }
 // Imaginary empty line!
 ```