Conditional tags and for-loops

EME provides the use of conditional tags and for-loops.

Conditional tags

Sometimes you want info only to be shown dependent on some conditions. In almost all formatting settings, you can use a special shortcode called [eme_if] that allows these kind of decisions:
You can use all placeholders in the if-part, just by prepending them with “ESC”, e.g you could use this for single event formatting:


#j, #M #Y – #H:#i
#_NOTES
[eme_if tag='#ESC_ATT{color}' value='red'] color: #_ATT{color} [/eme_if]
[eme_if tag='#ESC_ATT{price}'] price: #_ATT{price} [/eme_if]
[eme_if tag='#ESC_TOWN'] the town is: #_TOWN [/eme_if]
[eme_if tag="#ESC_ATT{Image URL}"] <img src=”#_ATT{Image URL}” /> [/eme_if]
[eme_if tag="#ESC_STARTDATE" value="#ESC_ENDDATE"] The start and end date of this event are the same, so just showing start: #_STARTDATE [/eme_if]
[eme_if tag="#ESC_{j M Y}" value="#ESC@_{j M Y}"] The start and end date of this event are the same: #j #M #Y [/eme_if]
[eme_if tag="#ESC_{j M Y}" notvalue="#ESC@_{j M Y}"] This date is only printed if different from start date: #@_{- j M Y} [/eme_if]


The possible conditions you can test for are:

  • Nothing, you then just check that the placeholder/string mentioned in the tag is not empty: [eme_if tag='#ESC_TOWN']
  • is_empty=1 checks that the placeholder/string mentioned in the tag is in fact empty: [eme_if tag='#ESC_TOWN' is_empty=1]
  • value or eq checks if the placeholder/string mentioned in the tag is the same as the one mentioned in value:
    [eme_if tag='#ESC_ATT{color}' value='red'] color: #_ATT{color} [/eme_if]
  • notvalue or ne checks if the placeholder/string mentioned in the tag has a value different than the once mentioned in value
  • lt checks if the numerical value of the placeholder/string mentioned in the tag has a value lower than the once mentioned in lt
  • le checks if the numerical value of the placeholder/string mentioned in the tag has a value lower than or equal to the once mentioned in lt
  • gt checks if the numerical value of the placeholder/string mentioned in the tag has a value bigger than the once mentioned in gt
  • ge checks if the numerical value of the placeholder/string mentioned in the tag has a value bigger than or equal to the once mentioned in gt
  • contains checks if the value of the placeholder/string mentioned in the contains occurs in the once mentioned in tag
  • notcontains checks if the value of the placeholder/string mentioned in the notcontains doesn’t occur in the once mentioned in tag

As extra, next to the regular placeholders you can use, I added some extra placeholders:

  • #_IS_SINGLE_EVENT (‘1’ if you’re viewing a single event details, ‘0’ otherwise)
  • #_IS_SINGLE_LOC (‘1’ if you’re viewing a single location details, ‘0’ otherwise)
  • #_IS_LOGGED_IN (‘1’ if user is logged into WP, ‘0’ otherwise)
  • #_IS_ADMIN_PAGE (‘1’ if on the admin pages, ‘0’ otherwise)
  • #_IS_PRIVATE_EVENT (‘1’ if the event is a private event, ‘0’ otherwise)
  • #_IS_RSVP_ENABLED (‘1’ if the event is RSVP-able, ‘0’ otherwise)
  • #_IS_RECURRENT_EVENT (‘1’ if the event is part of a recurrence, ‘0’ otherwise)
  • #_IS_SINGLE_DAY (‘1’ if you’re viewing a single day, ‘0’ otherwise)
  • #_IS_REGISTERED (‘1’ if WP user has already registered for the event, ‘0’ otherwise)
  • #_IS_MULTIPRICE (‘1’ if the event is a multiprice event, ‘0’ otherwise)
  • #_IS_MULTISEAT (‘1’ if the event is a multiseat event, ‘0’ otherwise)
  • #_IS_MULTIDAY (‘1’ if the event start date is different from the end date, ‘0’ otherwise)
  • #_IS_MULTIBOOKING (‘1’ when actually doing a multi-booking, not when updating/confirming/deleting a booking)
  • #_IS_ALLDAY (‘1’ if the event is a all-day event, ‘0’ otherwise)
  • #_IS_ATTENDANCE (‘1’ if the event only takes rsvp attendances, ‘0’ otherwise)
  • #_IS_RSVP_ENDED (‘1’if the registration period has passed, ‘0’ otherwise)
  • #_IS_FIRST_RECURRENCE (‘1’if the event is the first event in a recurrence series, ‘0’ otherwise)
  • #_IS_LAST_RECURRENCE (‘1’if the event is the last event in a recurrence series, ‘0’ otherwise)

Example usage:
[eme_if tag='#_IS_LOGGED_IN' value='0'] You are NOT logged in [/eme_if]
[eme_if tag='#_IS_LOGGED_IN' value='1'] You are logged in [/eme_if]
[eme_if tag='#ESC_CATEGORIES' contains='red'] The event is in at least the red category [/eme_if]
[eme_if tag="#ESCj #ESCM #ESCY" value="#ESC@j #ESC@M #ESC@Y"] The start and end date of this event is the same, so just showing start: #j #M #Y [/eme_if]
Or, print start date, and print end date only if different : #_STARTDATE [eme_if tag="#ESC_STARTDATE" notvalue="#ESC_ENDDATE"] #_ENDDATE [/eme_if]
A variant of the above, using curly brackets:
[eme_if tag="#ESC_{j M Y}" value="#ESC@_{j M Y}"] The start and end date of this event is the same: #{j M Y} [/eme_if]
Print start date, and print end date only if different:
#_{j M Y} [eme_if tag="#ESC_{j M Y}" notvalue="#ESC@_{j M Y}"] #@_{- j M Y} [/eme_if]
Print the list of attendees if at least one person signed up:
[eme_if tag='#_AVAILABLESPACES' lt='#_TOTALSPACES']<p>The following people have signed up for this event:#_ATTENDEES</p>[/eme_if]

Using this conditional tag requires some playing around …
I also added [eme_if2], [eme_if3], [eme_if4] … till [eme_if15], if you want to use more than one level of logic (wordpress doesn’t like a shortcode with the same name enclosed in another one).

For-loops

Using the shortcode [eme_for], you can use a for-loop to show specific info a number of times. Usage for this might be e.g. to show images for the number of seats taken, instead of a number.
The required options are:

  • min=x with ‘x’ being the lowest number in the for-loop
  • max=y with ‘y’ being the highest number in the for-loop

An example is easier here:
[eme_for min='1' max='5']Do anyting here, it will be repeated 5 times[/eme_for]
[eme_for min='1' max='#_RESERVEDSPACES']Do anyting here, it will be repeated for each reserved seat[/eme_for]