Refactor help functionality: extract relevant operations to a class

[alexboia]

Target code area or entity The functions that provide the help content should be extracted to a class. Main plug-in file, abp01-plugin-main.php, the following functions:

• abp01_get_help_file_for_locale();
• abp01_admin_help_page().

Target aspect Code readability

Proposed solution A new class should be defined, with the following singature:

class Abp01_Help {
   public function getHelpContentForLocale($locale) {}

   public function getHelpContentForCurrentLocale() {}
}

Thus:

• abp01_get_help_file_for_locale() would disappear from abp01-plugin-main.php and would be integrated as a private method of Abp01_Help;
• abp01_admin_help_page() would simply call the appropriate method of Abp01_Help.