**Language / Langue :** [[fr:yaml:choix|FR]] | **EN**

====== Choices and Buttons (YAML) ======

Choices define the exits available from a room — navigation, access conditions and buttons shown to the player.

===== Minimal syntax =====

The simplest form: a destination, nothing else.

<code yaml>
choices:
  - to: forest
  - to: village
</code>

The room ''forest'' is reachable by typing ''go forest''. No button is displayed.

===== Adding a button =====

''button:'' displays a clickable button below the room text.

<code yaml>
choices:
  - button: "⬆️ Go north"
    to: forest

  - button: "🏠 Back to village"
    to: village
</code>

===== Typed command =====

''command:'' defines a keyword the player can type (in addition to the button).

<code yaml>
choices:
  - command: north
    button: "⬆️ Go north"
    to: forest
</code>

The player can click the button **or** type ''go north''.
Without ''command:'', only ''go forest'' (the room id) works.

See [[en:yaml:alias|Aliases and commands]] for global shortcuts and action aliases.

===== Button inherited from the room =====

If the destination room has a ''button:'', choices pointing to it without their own ''button:'' inherit that label automatically.

<code yaml>
rooms:
  - id: laboratory
    button: "⚗️ Laboratory"
    text: "..."

  - id: corridor
    choices:
      - to: laboratory    # displays "⚗️ Laboratory" without repeating it here
</code>

===== to: previous =====

''to: previous'' returns to the room the player came from.

<code yaml>
choices:
  - command: back
    button: "↩️ Back"
    to: previous
</code>

===== Access condition (if:) =====

''if:'' blocks access if the condition is not met. The player receives ''text_ko:'' as feedback.

<code yaml>
choices:
  - command: enter
    button: "🚪 Enter"
    to: secret_room
    if: "key"
    text_ko: "The door is locked."
    text_ok: "You enter the secret room."
</code>

  * ''text_ko:'' — shown if the condition fails (access denied)
  * ''text_ok:'' — shown if the condition succeeds, before moving

Without a condition, ''text_ok:'' and ''text_ko:'' are not used.

===== Conditional button (visible-if / disabled-if) =====

<code yaml>
choices:
  - command: expert
    button: "🏆 Expert mode"
    to: expert_room
    visible-if: "v_score_v > 50"    # button hidden if score <= 50

  - command: move
    button: "💀 Move on"
    to: next_room
    disabled-if: "v_hp_v <= 0"      # button visible but inactive if HP = 0
</code>

  * ''visible-if:'' — the button disappears if the condition is false
  * ''disabled-if:'' — the button stays visible but cannot be clicked

===== Click effect (effect:) =====

''effect:'' runs an action **before** moving to the destination.

<code yaml>
choices:
  - command: buy
    button: "🪙 Buy (-10 gold)"
    to: shop
    if: "v_gold_v >= 10"
    effect: "gold.-.10"
</code>

===== Clear HUD on click =====

<code yaml>
choices:
  - command: back
    button: "↩️ Back"
    to: home
    clear-hud:
      - all
</code>

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