public commit

app/src/data/fields/indices/EntityIndex.ts

@@ -0,0 +1,46 @@
+import type { Entity } from "../../entities";
+import { Field } from "../Field";
+
+export class EntityIndex {
+   constructor(
+      public entity: Entity,
+      public fields: Field[],
+      public unique: boolean = false,
+      public name?: string
+   ) {
+      if (fields.length === 0) {
+         throw new Error("Indices must contain at least one field");
+      }
+      if (fields.some((f) => !(f instanceof Field))) {
+         throw new Error("All fields must be instances of Field");
+      }
+
+      if (unique) {
+         const firstRequired = fields[0]?.isRequired();
+         if (!firstRequired) {
+            throw new Error(
+               `Unique indices must have first field as required: ${fields
+                  .map((f) => f.name)
+                  .join(", ")}`
+            );
+         }
+      }
+
+      if (!name) {
+         this.name = [
+            unique ? "idx_unique" : "idx",
+            entity.name,
+            ...fields.map((f) => f.name)
+         ].join("_");
+      }
+   }
+
+   toJSON() {
+      return {
+         entity: this.entity.name,
+         fields: this.fields.map((f) => f.name),
+         //name: this.name,
+         unique: this.unique
+      };
+   }
+}