Implement support for true/false permission requirements in FancyDialog

docs/src/fancydialogs/tutorials/json-schema.md

@@ -105,6 +105,7 @@ Items will be supported in the body section in a future release.
 `requirements`: The requirement for this field to display
 - `type`: Either `permission` or `stringMatch`.
 - `permission`: If type is `permission`, this is the permission to check for.
+- `value`: If type is `permission`, whether the player should have the permission. `true` (default) requires the player to have the permission, `false` requires the player to NOT have it.
 - `input`: If type is `stringMatch`, this is the string being matched against `output`.
 - `output`: If type is `stringMatch`, this is the string being matched against `input`.
 
@@ -130,6 +131,7 @@ More input types will be added in future releases, such as checkboxes and number
 `requirements`: The requirement for this field to display
 - `type`: Either `permission` or `stringMatch`.
 - `permission`: If type is `permission`, this is the permission to check for.
+- `value`: If type is `permission`, whether the player should have the permission. `true` (default) requires the player to have the permission, `false` requires the player to NOT have it.
 - `input`: If type is `stringMatch`, this is the string being matched against `output`.
 - `output`: If type is `stringMatch`, this is the string being matched against `input`.
 
@@ -151,6 +153,7 @@ More input types will be added in future releases, such as checkboxes and number
 `requirements`: The requirement for this field to display
 - `type`: Either `permission` or `stringMatch`.
 - `permission`: If type is `permission`, this is the permission to check for.
+- `value`: If type is `permission`, whether the player should have the permission. `true` (default) requires the player to have the permission, `false` requires the player to NOT have it.
 - `input`: If type is `stringMatch`, this is the string being matched against `output`.
 - `output`: If type is `stringMatch`, this is the string being matched against `input`.
 
@@ -165,6 +168,7 @@ More input types will be added in future releases, such as checkboxes and number
 - `requirements`: The requirement for this field to display
   - `type`: Either `permission` or `stringMatch`.
   - `permission`: If type is `permission`, this is the permission to check for.
+  - `value`: If type is `permission`, whether the player should have the permission. `true` (default) requires the player to have the permission, `false` requires the player to NOT have it.
   - `input`: If type is `stringMatch`, this is the string being matched against `output`.
   - `output`: If type is `stringMatch`, this is the string being matched against `input`.
 

plugins/fancydialogs/src/main/java/com/fancyinnovations/fancydialogs/dialog/DialogImpl.java

@@ -54,21 +54,19 @@ private String replaceArgs(String text, String[] args) {
         return result;
     }
 
-    private boolean checkPerm(Player player, String perm) {
-        if (perm == null) {
+    private boolean checkPerm(Player player, String perm, String valueStr) {
+        if (perm == null || perm.isEmpty()) {
             return true;
         }
-        if (!perm.equals("") && !player.hasPermission(perm)) {
-            return false;
-        }
-        return true;
+        boolean expectedValue = valueStr == null || Boolean.parseBoolean(valueStr);
+        return player.hasPermission(perm) == expectedValue;
     }
 
     private boolean checkRequirements(Player player, Map<String, String> requirements) {
         if (requirements == null) { return true; }
         if (requirements.get("type") == null) { return true; }
         if (requirements.get("type").equals("permission")) {
-            return checkPerm(player, requirements.get("permission"));
+            return checkPerm(player, requirements.get("permission"), requirements.get("value"));
         }
         if (requirements.get("type").equals("stringMatch")) {
             if (requirements.get("input") == null || requirements.get("output") == null) { return true; }