[EBT] Fix schema support to Date (#132051)

packages/analytics/client/src/schema/types.test.ts

@@ -182,6 +182,66 @@ describe('schema types', () => {
       });
     });
 
+    describe('Date value', () => {
+      test('it should allow the correct type and enforce the _meta.description', () => {
+        let valueType: SchemaValue<Date> = {
+          type: 'date',
+          _meta: {
+            description: 'Some description',
+          },
+        };
+
+        valueType = {
+          type: 'keyword',
+          _meta: {
+            description: 'Some description',
+            optional: false,
+          },
+        };
+
+        valueType = {
+          // @ts-expect-error because the type does not match
+          type: 'long',
+          _meta: {
+            description: 'Some description',
+            optional: false,
+          },
+        };
+
+        valueType = {
+          type: 'keyword',
+          _meta: {
+            description: 'Some description',
+            // @ts-expect-error optional can't be true when the types don't set the value as optional
+            optional: true,
+          },
+        };
+
+        // @ts-expect-error because it's missing the _meta.description
+        valueType = { type: 'date' };
+        expect(valueType).not.toBeUndefined(); // <-- Only to stop the var-not-used complain
+      });
+      test('it should enforce `_meta.optional: true`', () => {
+        let valueType: SchemaValue<Date | undefined> = {
+          type: 'date',
+          _meta: {
+            description: 'Some description',
+            optional: true,
+          },
+        };
+
+        valueType = {
+          type: 'date',
+          _meta: {
+            description: 'Some description',
+            // @ts-expect-error because optional can't be false when the value can be undefined
+            optional: false,
+          },
+        };
+        expect(valueType).not.toBeUndefined(); // <-- Only to stop the var-not-used complain
+      });
+    });
+
     describe('Object value', () => {
       test('it should allow "pass_through" and enforce the _meta.description', () => {
         let valueType: SchemaValue<{ a_value: string }> = {

packages/analytics/client/src/schema/types.ts

@@ -31,7 +31,7 @@ export type AllowedSchemaTypes =
 /**
  * Helper to ensure the declared types match the schema types
  */
-export type PossibleSchemaTypes<Value> = Value extends string
+export type PossibleSchemaTypes<Value> = Value extends string | Date
   ? AllowedSchemaStringTypes
   : Value extends number
   ? AllowedSchemaNumberTypes
@@ -66,6 +66,8 @@ export type SchemaValue<Value> =
       : // Otherwise, try to infer the type and enforce the schema
       NonNullable<Value> extends Array<infer U> | ReadonlyArray<infer U>
       ? SchemaArray<U, Value>
+      : NonNullable<Value> extends Date
+      ? SchemaChildValue<Value>
       : NonNullable<Value> extends object
       ? SchemaObject<Value>
       : SchemaChildValue<Value>);