Add format validations (#172)

- Add validation 'Name: Must contain more than native emojis'
- Add validation 'Description: '4-byte characters are not allowed'

lib/validate-label-format.js

@@ -4,16 +4,20 @@ const Ajv = require('ajv');
 
 const ajv = new Ajv({ allErrors: true });
 
+const addFormats = require('./label-formats');
+
+addFormats(ajv);
+
 const schema = {
 	type: 'object',
 	properties: {
-		name: { type: 'string', maxLength: 50, },
+		name: { type: 'string', maxLength: 50, format: 'must contain more than native emoji' },
 		color: { type: 'string', pattern: '^[a-fA-F0-9]{6}$' },
-		description: { type: 'string', maxLength: 100 },
+		description: { type: 'string', maxLength: 100, format: 'doesn\'t accept 4-byte Unicode' },
 		delete: { type: 'boolean', default: false },
 		aliases: {
 			type: 'array',
-			items: { type: 'string', maxLength: 50 }
+			items: { type: 'string', maxLength: 50, format: 'must contain more than native emoji' }
 		},
 	},
 	required: ['name'],