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system/scripts/data/l5r5e-setfield.js

@@ -0,0 +1,47 @@
+import { HTML_l5r5e_MultiSelectElement } from "../misc/l5r5e-multiselect.js";
+/**
+ * A subclass of [ArrayField]{@link ArrayField} which supports a set of contained elements.
+ * Elements in this set are treated as fungible and may be represented in any order or discarded if invalid.
+ */
+export class l5r5e_SetField extends foundry.data.fields.SetField {
+
+  // We don't get the options we expect when we convert this to input,
+  // So store them here
+  #savedOptions;
+
+  constructor(options={}, context={}) {
+    super(new foundry.data.fields.StringField({
+      choices: options.options.map((option) => option.value)
+    }), options, context);
+    
+    this.#savedOptions = options;
+  }
+  
+    /** @override */
+    initialize(value, model, options={}) {
+      if ( !value ) return value;
+      return new Set(super.initialize(value, model, options));
+    }
+  
+    /** @override */
+    toObject(value) {
+      if ( !value ) return value;
+      return Array.from(value).map(v => this.element.toObject(v));
+    }
+  
+    /* -------------------------------------------- */
+    /*  Form Field Integration                      */
+    /* -------------------------------------------- */
+  
+    /** @override */
+    _toInput(config) {
+      const e = this.element;
+      return HTML_l5r5e_MultiSelectElement.create({
+        name: config.name,
+        options: this.#savedOptions.options,
+        groups: this.#savedOptions.groups,
+        value: config.value,
+        localize: config.localize
+      });
+    }
+  }