Email min/max property

README.md

@@ -591,6 +591,8 @@ Property | Default  | Description
 `empty`  | `false`   | If `true`, the validator accepts an empty array `""`.
 `mode`   | `quick`  | Checker method. Can be `quick` or `precise`.
 `normalize`   | `false`  | Normalize the e-mail address (trim & lower-case). _It's a sanitizer, it will change the value in the original object._
+`min`  	 | `null`   | Minimum value length.
+`max`  	 | `null`   | Maximum value length.
 
 ## `enum`
 This is an enum validator.
@@ -1333,7 +1335,10 @@ Name                | Default text
 `dateMin`	| The '{field}' field must be greater than or equal to {expected}.
 `dateMax`	| The '{field}' field must be less than or equal to {expected}.
 `forbidden`	| The '{field}' field is forbidden.
-`email`	| The '{field}' field must be a valid e-mail.
+‍‍`email` | The '{field}' field must be a valid e-mail.
+`emailEmpty` | The '{field}' field must not be empty.
+`emailMin` | The '{field}' field length must be greater than or equal to {expected} characters long.
+`emailMax` | The '{field}' field length must be less than or equal to {expected} characters long.
 `url`	| The '{field}' field must be a valid URL.
 `enumValue`	| The '{field}' field value '{expected}' does not match any of the allowed values.
 `equalValue`	| The '{field}' field value must be equal to '{expected}'.

index.d.ts

@@ -140,6 +140,14 @@ declare module "fastest-validator" {
 		 * Checker method. Can be quick or precise
 		 */
 		mode?: "quick" | "precise";
+		/**
+		 * Minimum value length
+		 */
+		min?: number;
+		/**
+		 * Maximum value length
+		 */
+		max?: number;
 
 		normalize?: boolean;
 	}

lib/messages.js

@@ -59,6 +59,8 @@ module.exports = {
 
 	email: "The '{field}' field must be a valid e-mail.",
 	emailEmpty: "The '{field}' field must not be empty.",
+	emailMin: "The '{field}' field length must be greater than or equal to {expected} characters long.",
+	emailMax: "The '{field}' field length must be less than or equal to {expected} characters long.",
 
 	luhn: "The '{field}' field must be a valid checksum luhn.",
 

lib/rules/email.js

@@ -37,6 +37,22 @@ module.exports = function({ schema, messages }, path, context) {
 		`);
 	}
 
+	if (schema.min != null) {
+		src.push(`
+			if (value.length < ${schema.min}) {
+				${this.makeError({ type: "emailMin", expected: schema.min, actual: "value.length", messages })}
+			}
+		`);
+	}
+
+	if (schema.max != null) {
+		src.push(`
+			if (value.length > ${schema.max}) {
+				${this.makeError({ type: "emailMax", expected: schema.max, actual: "value.length", messages })}
+			}
+		`);
+	}
+
 	src.push(`
 		if (!${pattern.toString()}.test(value)) {
 			${this.makeError({ type: "email",  actual: "value", messages })}

test/rules/email.spec.js

@@ -77,4 +77,18 @@ describe("Test rule: email", () => {
 		});
 	});
 
+	it("check min length", () => {
+		const check = v.compile({ $$root: true, type: "email", min: 10 });
+
+		expect(check("[email protected]")).toEqual([{ type: "emailMin", expected: 10, actual: 7, message: "The '' field length must be greater than or equal to 10 characters long." }]);
+		expect(check("[email protected]")).toEqual(true);
+	});
+
+	it("check max length", () => {
+		const check = v.compile({ $$root: true, type: "email", max: 20 });
+
+		expect(check("[email protected]")).toEqual(true);
+		expect(check("[email protected]")).toEqual([{ type: "emailMax", expected: 20, actual: 45, message: "The '' field length must be less than or equal to 20 characters long." }]);
+	});
+
 });