Initial commit - Event Planner application

node_modules/kysely/dist/esm/plugin/deduplicate-joins/deduplicate-joins-transformer.js

@@ -0,0 +1,39 @@
+/// <reference types="./deduplicate-joins-transformer.d.ts" />
+import { OperationNodeTransformer } from '../../operation-node/operation-node-transformer.js';
+import { compare, freeze } from '../../util/object-utils.js';
+export class DeduplicateJoinsTransformer extends OperationNodeTransformer {
+    transformSelectQuery(node, queryId) {
+        return this.#transformQuery(super.transformSelectQuery(node, queryId));
+    }
+    transformUpdateQuery(node, queryId) {
+        return this.#transformQuery(super.transformUpdateQuery(node, queryId));
+    }
+    transformDeleteQuery(node, queryId) {
+        return this.#transformQuery(super.transformDeleteQuery(node, queryId));
+    }
+    #transformQuery(node) {
+        if (!node.joins || node.joins.length === 0) {
+            return node;
+        }
+        return freeze({
+            ...node,
+            joins: this.#deduplicateJoins(node.joins),
+        });
+    }
+    #deduplicateJoins(joins) {
+        const out = [];
+        for (let i = 0; i < joins.length; ++i) {
+            let foundDuplicate = false;
+            for (let j = 0; j < out.length; ++j) {
+                if (compare(joins[i], out[j])) {
+                    foundDuplicate = true;
+                    break;
+                }
+            }
+            if (!foundDuplicate) {
+                out.push(joins[i]);
+            }
+        }
+        return freeze(out);
+    }
+}