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Bubberstation/code/modules/language/language_manuals.dm
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MrMelbert 8c1e35e1c0 Refactors mind language holders into non-existent, fixes new languages being deleted on species swap + tests (#76612)
## About The Pull Request

This PR refactors mind language holders into non-existence

As a result, `update_atom_languages` is no longer necessary

Mind-bound languages are transferred via `/mind/proc/transfer_to`

Species changing no longer deletes and re-creates the mob's language
holder, allowing them to keep any languages they have.

Species languages are sourced from `LANGUAGE_SPECIES` now, meaning they
are removed when they change species. If the mob is not a human with a
species datum, these are effectively just atom level languages.

Makes a bunch of unit tests to ensure language transfer over certain
events works as intended

## Why It's Good For The Game

Mobs with minds having two independent language holders results in a
good few bugs, and simply doesn't make sense when we have sources
(`LANGUAGE_MIND`).

Instead of tracking two language holders, we can simply use sources
better and only track one.

This means that the language holder you start with is your language
holder, period. It doesn't get deleted or re-instantiated or whatever.

## Changelog

🆑 Melbert
refactor: Refactored language holders, making species changes not delete
all of your known languages
/🆑
2023-07-10 18:34:57 +00:00

115 lines
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/obj/item/language_manual
icon = 'icons/obj/library.dmi'
icon_state = "book2"
/// Number of charges the book has, limits the number of times it can be used.
var/charges = 1
/// Path to a language datum that the book teaches.
var/datum/language/language = /datum/language/common
/// Flavour text to display when the language is successfully learned.
var/flavour_text = "suddenly your mind is filled with codewords and responses"
/obj/item/language_manual/attack_self(mob/living/user)
if(!isliving(user))
return
if(user.has_language(language))
to_chat(user, span_boldwarning("You start skimming through [src], but you already know [initial(language.name)]."))
return
to_chat(user, span_boldannounce("You start skimming through [src], and [flavour_text]."))
user.grant_language(language)
user.remove_blocked_language(language, source=LANGUAGE_ALL)
ADD_TRAIT(user.mind, TRAIT_TOWER_OF_BABEL, MAGIC_TRAIT) // this makes you immune to babel effects
use_charge(user)
/obj/item/language_manual/attack(mob/living/M, mob/living/user)
if(!istype(M) || !istype(user))
return
if(M == user)
attack_self(user)
return
playsound(loc, SFX_PUNCH, 25, TRUE, -1)
if(M.stat == DEAD)
M.visible_message(span_danger("[user] smacks [M]'s lifeless corpse with [src]."), span_userdanger("[user] smacks your lifeless corpse with [src]."), span_hear("You hear smacking."))
else if(M.has_language(language))
M.visible_message(span_danger("[user] beats [M] over the head with [src]!"), span_userdanger("[user] beats you over the head with [src]!"), span_hear("You hear smacking."))
else
M.visible_message(span_notice("[user] teaches [M] by beating [M.p_them()] over the head with [src]!"), span_boldnotice("As [user] hits you with [src], [flavour_text]."), span_hear("You hear smacking."))
M.grant_language(language, source = LANGUAGE_MIND)
use_charge(user)
/obj/item/language_manual/proc/use_charge(mob/user)
charges--
if(!charges)
var/turf/T = get_turf(src)
T.visible_message(span_warning("The cover and contents of [src] start shifting and changing! It slips out of your hands!"))
new /obj/item/book/manual/random(T)
qdel(src)
/obj/item/language_manual/codespeak_manual
name = "codespeak manual"
desc = "The book's cover reads: \"Codespeak(tm) - Secure your communication with metaphors so elaborate, they seem randomly generated!\""
language = /datum/language/codespeak
flavour_text = "suddenly your mind is filled with codewords and responses"
/obj/item/language_manual/codespeak_manual/unlimited
name = "deluxe codespeak manual"
charges = INFINITY
/obj/item/language_manual/roundstart_species
/obj/item/language_manual/roundstart_species/Initialize(mapload)
. = ..()
language = pick( \
/datum/language/voltaic, \
/datum/language/nekomimetic, \
/datum/language/draconic, \
/datum/language/moffic, \
/datum/language/calcic \
)
name = "[initial(language.name)] manual"
desc = "The book's cover reads: \"[initial(language.name)] for Xenos - Learn common galactic tongues in seconds.\""
flavour_text = "you feel empowered with a mastery over [initial(language.name)]"
/obj/item/language_manual/roundstart_species/unlimited
charges = INFINITY
/obj/item/language_manual/roundstart_species/unlimited/Initialize(mapload)
. = ..()
name = "deluxe [initial(language.name)] manual"
/obj/item/language_manual/roundstart_species/five
charges = 5
/obj/item/language_manual/roundstart_species/five/Initialize(mapload)
. = ..()
name = "extended [initial(language.name)] manual"
// So drones can teach borgs and AI dronespeak. For best effect, combine with mother drone lawset.
/obj/item/language_manual/dronespeak_manual
name = "dronespeak manual"
desc = "The book's cover reads: \"Understanding Dronespeak - An exercise in futility.\" The book is written entirely in binary, non-silicons probably won't understand it."
language = /datum/language/drone
flavour_text = "suddenly the drone chittering makes sense"
charges = INFINITY
/obj/item/language_manual/dronespeak_manual/attack(mob/living/M, mob/living/user)
// If they are not drone or silicon, we don't want them to learn this language.
if(!(isdrone(M) || issilicon(M)))
M.visible_message(span_danger("[user] beats [M] over the head with [src]!"), span_userdanger("[user] beats you over the head with [src]!"), span_hear("You hear smacking."))
return
return ..()
/obj/item/language_manual/dronespeak_manual/attack_self(mob/living/user)
if(!(isdrone(user) || issilicon(user)))
to_chat(user, span_danger("You beat yourself over the head with [src]!"))
return
return ..()