Create an EvaluationPlugin for the normalized format

Author: jdesrosiers

src/output-plugin.js

@@ -0,0 +1,68 @@
+import * as Instance from "@hyperjump/json-schema/instance/experimental";
+
+/**
+ * @import { EvaluationPlugin, ValidationContext } from "@hyperjump/json-schema/experimental"
+ * @import { NormalizedOutput } from "./index.js"
+ */
+
+/**
+ * @typedef {ValidationContext & {
+ *   output: NormalizedOutput;
+ *   subSchemaOutput?: NormalizedOutput[];
+ * }} ErrorsContext
+ */
+
+/** @implements EvaluationPlugin<ErrorsContext> */
+export class JsonSchemaErrorsOutputPlugin {
+  /** @type NonNullable<EvaluationPlugin<ErrorsContext>["beforeSchema"]> */
+  beforeSchema(_url, _instance, context) {
+    context.output = {};
+  }
+
+  /** @type NonNullable<EvaluationPlugin<ErrorsContext>["beforeKeyword"]> */
+  beforeKeyword(_node, _instance, context, schemaContext) {
+    context.output = schemaContext.output;
+  }
+
+  /** @type NonNullable<EvaluationPlugin<ErrorsContext>["afterKeyword"]> */
+  afterKeyword(keywordNode, instance, context, valid, schemaContext, keyword) {
+    const [keywordUri, schemaLocation] = keywordNode;
+
+    if (keyword.simpleApplicator) {
+      for (const subSchemaOutput of context.subSchemaOutput ?? []) {
+        mergeOutput(schemaContext.output, subSchemaOutput);
+      }
+    } else {
+      schemaContext.output[Instance.uri(instance)] ??= {};
+      schemaContext.output[Instance.uri(instance)][keywordUri] ??= {};
+      schemaContext.output[Instance.uri(instance)][keywordUri][schemaLocation] = valid
+        || (context.subSchemaOutput ?? valid);
+    }
+  }
+
+  /** @type NonNullable<EvaluationPlugin<ErrorsContext>["afterSchema"]> */
+  afterSchema(url, instance, context, valid) {
+    if (typeof context.ast[url] === "boolean" && !valid) {
+      context.output[Instance.uri(instance)] ??= {};
+      context.output[Instance.uri(instance)]["https://json-schema.org/validation"] ??= {};
+      context.output[Instance.uri(instance)]["https://json-schema.org/validation"][url] = valid;
+    }
+
+    context.subSchemaOutput ??= [];
+    context.subSchemaOutput.push(context.output);
+
+    this.output = context.output;
+  }
+}
+
+/** @type (a: NormalizedOutput, b: NormalizedOutput) => void */
+const mergeOutput = (a, b) => {
+  for (const instanceLocation in b) {
+    a[instanceLocation] ??= {};
+    for (const keywordUri in b[instanceLocation]) {
+      a[instanceLocation][keywordUri] ??= {};
+
+      Object.assign(a[instanceLocation][keywordUri], b[instanceLocation][keywordUri]);
+    }
+  }
+};