Program: Override.php - Notes

The program
     Used to maintain override text files for Dircaster, if such are used.
     Individual override values are not always required, so there is
     no forced requirements. (I.e. you may save a file with validation errors)
     Instead some helper validation has been provided.

     This program uses AJAX (JSON format).
      'Form submit' is suspended: data and validation are obtained via AJAX.
      The connection between the PHP program, JavaScript and CSS is
      tight.
        . Changing a 'class' name may break this interaction.
        . Changing an 'id' will most certainly break the program.

     This program set:
       override.php
         override.js
         override.css
       override_ajax_json.php
       override_ajax_util.php
     This program must be in the same folder as it's parent program
     set:
       dircaster.php
       config_inc.php.

     Additionally:
       . In config_inc.php, the variable $overrideFolder must be valued.
       . There must be a sub-folder 'templates' under the folder
         referenced by $overrideFolder in config_inc.php
       . Static dropdowns are controlled by functions at the end of
          the program. You can maintain such things as mine types and
          time zone ( select-options) by adding or deleting from the
          array at the top of each function.

     At the initial writing:
        . Development was done with EPHP error level _ALL. There should be no notices or warnings.
        . The CSS validates
        . The HTML validates
          The screen layout was designed for 800x600.
       Any future maintenance should try to keep this level of validation.



Basic Operation
 This program can create and maintain override text files. Additionally
 it can save and read (borrow data) from a template file.

 o Create a new file by starting with an empty file.
   Enter a name (excluding extension) as the file name.
 o Create a new file by borrowing from an existing override text file.
   Choose an existing override text file from the dropdown.
   Enter a new name.
 o Create a new file by borrowing from a template.
   Choose from the template dropdown.
   You must enter a new name.
 o Edit an existing file.
   Choose from the override dropdown.
   Keep teh same name.
 o After saving a file, it may also be saved as a template.
   You may also choose a new name.
   Before saving the template, you may change field values.


Requirements vs. verification

       o The use of overrides is not required to generate a feed with Dircaster
         if mp3 media is used and the ID3 tags have been valued.
         The original Dircaster read MP3 id tags to read tag information.
         Library routines are not available for other media.
         Override files provide overrides for many MP3 tags and supply other tags
         that cannot be obtained from the media.
       o Some RSS readers, iTunes especially, provide more robust information.
         Override files provide the ability to add these to the feed.
       o Since overrides are not always required (Dircaster provides some defaults) and there are different
         requirements by some readers, this Override Generator, does not impose any
         restrictions.
       o Instead of enforcing strong requirements, the program supplies helpers,
         usually seen as Verify buttons.


  How used in Dircaster.

  Each component has additional help on the screen.

  The item enclosure tag is made of three components.
    . The [enclosureURL]
      <item><enclosure> href attribute.
    . The [enclosureLength]
      <item><enclosure> length attribute.
    . The [enclosureType]
      <item><enclosure> type attribute.

    The [duration] is the duration for the iTuens time column.

    Note: See [link] below.

  The item title tag [title]
    <item><title>>
    Always code for remote mode. For non-remote it defaults to the file name.

  The item link tag [link]
    <item><link>
    This becomes the action when the title is clicked in RSS.
    Either
    . The media link.
    . A web page.

  The item pubDate tag [pubDate]
    <item><pubDate>
    For remote operation this should always be coded.
    For non-remote, it defaults to the media file date.

    Hint: Always code this to avoid republishing if the files are
    move to a server in another time zone.

  The item iTunes subtitle tag [subtitle]
    <item><itunes:subtitle>

  The item author tag [author]
    <item><author>

  The [album]
    Used with the title if a description is not given.

  The [artist]
    Used with the title if a description is not given.

  The item itunes summary tag [summary]
    <item><itunes:summary>

  The item itunes keywords tag [keywords]
    <item><itunes:keywords>

  The item guid [guid]
    <item><guid>
    This will default to the enclosureURL.

  These two fields construct the item description tag
    <item><description>
    . [commentText] - Plain text.
    . [commentCDATA] - Allows HTML and text (XML CDATA)

  The following fields make up the item itunes:link tag to supply an image
    <item><itunes:link>
    Note: The Feed Validator gives an error for this tag. You many
    want to use an HTML img tag in the commentCDATA.
    . [allowItemImage]
    . [imageURL]
    . [imageTitle]
    . [imageFileType]