PDA Ringtone Preference (#70485)

* Creates some new defines for constant values in the Messenger app
* Created a new type of preference, text preferences, with a FeatureShortTextInput TGUI component
* Uses said new preference to re-add a PDA ringtone preference.

code/modules/client/preferences/_preference.dm

@@ -527,7 +527,7 @@ GLOBAL_LIST_INIT(preference_entries_by_key, init_preference_entries_by_key())
 		"step" = step,
 	)
 
-/// A prefernece whose value is always TRUE or FALSE
+/// A preference whose value is always TRUE or FALSE
 /datum/preference/toggle
 	abstract_type = /datum/preference/toggle
 
@@ -542,3 +542,27 @@ GLOBAL_LIST_INIT(preference_entries_by_key, init_preference_entries_by_key())
 
 /datum/preference/toggle/is_valid(value)
 	return value == TRUE || value == FALSE
+
+
+/// A string-based preference accepting arbitrary string values entered by the user, with a maximum length.
+/datum/preference/text
+	abstract_type = /datum/preference/text
+
+	/// What is the maximum length of the value allowed in this field?
+	var/maximum_value_length = 256
+
+	/// Should we strip HTML the input or simply restrict it to the maximum_value_length?
+	var/should_strip_html = TRUE
+
+
+/datum/preference/text/deserialize(input, datum/preferences/preferences)
+	return should_strip_html ? STRIP_HTML_SIMPLE(input, maximum_value_length) : copytext(input, 1, maximum_value_length)
+
+/datum/preference/text/create_default_value()
+	return ""
+
+/datum/preference/text/is_valid(value)
+	return istext(value) && length(value) < maximum_value_length
+
+/datum/preference/text/compile_constant_data()
+	return list("maximum_length" = maximum_value_length)

code/modules/client/preferences/pda_ringtone.dm

@@ -0,0 +1,19 @@
+/**
+ * This is the preference for the player's SpaceMessenger ringtone.
+ * Currently only applies to humans spawned in with a job, as it's hooked
+ * into `/datum/job/proc/after_spawn()`.
+ */
+/datum/preference/text/pda_ringtone
+	savefile_key = "pda_ringtone"
+	category = PREFERENCE_CATEGORY_NON_CONTEXTUAL
+	savefile_identifier = PREFERENCE_CHARACTER
+	maximum_value_length = MESSENGER_RINGTONE_MAX_LENGTH
+
+
+/datum/preference/text/pda_ringtone/create_default_value()
+	return MESSENGER_RINGTONE_DEFAULT
+
+
+// Returning false here because this pref is handled a little differently, due to its dependency on the existence of a PDA.
+/datum/preference/text/pda_ringtone/apply_to_human(mob/living/carbon/human/target, value, datum/preferences/preferences)
+	return FALSE