feat: improve monorepo dev experience

packages/core-validator/src/index.ts

@@ -0,0 +1,48 @@
+import Ajv, {AnySchema} from 'ajv';
+import addFormats from 'ajv-formats';
+import schema from '../schema/core.schema.json';
+import {SchemaMap} from '../schema/core.schema.js';
+
+export type RemoveNeverProperties<T> = {
+  [K in Exclude<
+    keyof T,
+    {
+      // eslint-disable-next-line @typescript-eslint/ban-types
+      [P in keyof T]: T[P] extends Function ? P : never;
+    }[keyof T]
+  >]: T[K];
+};
+
+export type IncludeProperty<T extends object, E> = RemoveNeverProperties<{
+  [K in keyof T]: T[K] extends E ? T[K] : never;
+}>;
+
+type NameOf<I extends SchemaMap[keyof SchemaMap]> = keyof IncludeProperty<SchemaMap, I>;
+
+/**
+ * StAppsCore validator
+ */
+export class Validator {
+  private readonly ajv: Ajv.default;
+
+  constructor(additionalSchemas: AnySchema[] = []) {
+    this.ajv = new Ajv.default({
+      schemas: [schema, ...additionalSchemas],
+      verbose: true,
+      allowUnionTypes: true,
+    });
+    addFormats.default(this.ajv, {
+      formats: ['date-time', 'time', 'uuid', 'duration'],
+      mode: 'fast',
+    });
+  }
+
+  /**
+   * Validates anything against a given schema name or infers schema name from object
+   * @param instance Instance to validate
+   * @param schema Name of schema to validate instance against or the schema itself
+   */
+  public validate<T>(instance: unknown, schema: NameOf<T>): instance is T {
+    return this.ajv.validate(schema as string, instance);
+  }
+}