/opt/canhelp/node_modules/kysely/dist/esm/plugin/deduplicate-joins
Edit: /opt/canhelp/node_modules/kysely/dist/esm/plugin/deduplicate-joins/deduplicate-joins-transformer.js (1392B)
///
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);
}
}