Notes on Global Settings Options

Introduction

Global Options are a collection of options that do not sit well in any more specific tab!  They could equally have been grouped in a General tab.
They are Options that once set are rarely changed.

Fields

jD3.9 now supports Joomla! fields and Field Groups when the 'Enable Fields' option is set to Yes, which is the default.monitor01
These Joomla fields are much more universal and have more types than the old style jDownloads Custom fields.

Date format

The two options 'Long Date-Time format' and 'Short Date-Time format' allow specifying the way in which the date will appear.  The Short Date is selectable in some jD Menu items.

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The default Y-m-d produces a date in the form "2020-04-18".

If the Long Date option is left blank then Joomla format "LC2" is used which is like "Saturday, 18 April 2020 16:09". Similarly if the Short Date option is left blank then Joomla format "LC4" is used which is actually the same as the default Y-m-d.
For details of the various date and time formats see PHP dates. (opens in a new tab/window)

Download method

The option 'Send Downloads using the PHP script' is the default method of downloading.

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The progress of the file transfer is not shown but a completion message for success or error is shown.

With very big files (a few hundred MB) it is possible that timeouts may occur.

If you set this option to No, the download link is sent directly to the browser for it to control downloading of the Download.

Logging

If the 'Activate log function for Downloads' is set to Yes then all Download activities are logged in the databasemonitor04
Important: Some functions, such as the User Group Limits in User Groups Settings, need this logged data to work properly.

Deleting Images etc

The options 'Delete images from deleted Downloads' and 'Delete preview files from any deleted Downloads' allows deleting any images or preview linked with the Download if the Download is deleteted.monitor05
The Default for both options is purposely set to No.  This is because jDownloads stores images and preview files separately from the downloadable file so they may be in use with other Downloads or they may be required for replacement Downloads.

Specifically images, often refered to as 'Screenshots', are stored in /images/jdownloads/screenshots and the corresponding thumbnails are stored in /images/jdownloads/screenshots/thumbnails.
Audio and video preview files are stored in /jdownloads/_previews.

Temporary ZIP files

When using Download layouts that support Checkboxes then multiple files may be selected for downloading.  In this process theselected files are automatically stored into a temporary ZIP file.  It is this zip file that will be downloaded. monitor06
The ZIP filename is created starting with a prefix and followed by a random number.

Option 'Default prefix for temporary ZIP filenames' allows you to choose suitable text for the prefix.

The other option 'Delay time before temporay zip files are deleted' specifies the time, in minutes, for a system 'interupt' for jDownloads to delete the file.  This lreasonably long delay covers downloading large files on slow links.  It is recommended to leave this value unchanged unless you find it is too short for some situations.

Number of Images

The option 'Number of Images' specifies the maximum number of 'screenshot' images that you will allow to be added to a Download on your site. monitor07
The default is set to the absolute jDownload limit of 10.  Note also that when creating or editing a Download from the frontend there is a limit on the number if images allowed specified in the User Groups Settings, specifically in the Group Creation/Editing Settings option 'How many Images'. This has a default of 3.

Option 'Number of Images in Downloads List'  sets the limit for the number of icons to show in the backend listing.  If this option is set to zero and there are images associated with the Download then a small icon, global07B, will be shown.global07A

If 'View Preview File in Download List' is set to yes, the Download has one or more images and option 'Number of Images in Download List' is non zero, then a small preview images are shown in the backend download listing.

global07C
If 'View Price Field' in Download List' is Yes then the price, if set, shows in the backend listing. global07E
If there is no price set then it a simpleglobal07Fis shown.
global07CC

Operating System List

The option 'Add entry to list of Operating Systems' allows you to modify existing entries or extend the list from which a user may select.monitor08
 Use a , (comma) separator between each option. Always add new values at the end of the list.

Language of Downloadable file

The 'Add entry to list of Languages for downloadable File' should not be confused with the Download Language.  It allows modifing or extending the list. monitor09

The language here is the language used in the downloadable file.  It could of course be a programming language!  This option is clearly only useful when the language used in the file is different to that set for the Download Language.
Use a , (comma) separator between each option. Always add new values at the end of the list."

Checkbox text

The option 'Checkbox Text for the 'select all' Hint' only appears in the Frontend view when using a Downloads layout that supports checkboxes.  It appears in the subheader part of the view and would look like monitor10B.

Note that this option supports the language placeholders as indicated opposite.
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With that setup in a multilingual site then, if the German view is active, it would show as monitor10C .

Robots text

The option 'Robots' allows you to specify the default web Robot Meta-tag settings. These are changeable in every Category and Download.  These are the instructions of how web-crawlers will index your site.

If you select the 'Use Global' setting then the robot setting in the Joomla configuration is used.

The other possible settings are shown opposite.

This is quite a complex subject subject.  As well as the Robot Meta tags there is also a similar protection using a 'Robots.txt' site facility.

For more guidance see for example robots-meta-tags
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ColinM June 2020

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