Add value and custom function validators

Author: CodingCarlos

lib/validate.js

@@ -1,5 +1,6 @@
 
-const validators = ['type', 'length'];
+// Add validator names here
+const validators = ['type', 'length', 'value', 'func'];
 
 // Turn validator names to validator instances.
 for(let i = 0; i < validators.length; i++) {

lib/validators/func.js

@@ -0,0 +1,17 @@
+/**	
+ *	Custom function validator
+ *
+ *	{
+ *		func: function	A function to validate. Must return true or false.
+ *	}
+ */
+
+function isValid(data, model) {
+	if(!model.func) {
+		return true;
+	}
+	
+	return model.func(data);
+}
+
+module.exports = isValid;

lib/validators/value.js

@@ -0,0 +1,64 @@
+/**	
+ *	Value validator
+ *
+ *	{
+ *		value: {
+ *			eq: String || Number,		// Exact allowed value (equals)
+ *			max: Number,				// Maximum allowed value
+ *			min: Number,				// Minimum allowed value
+ *			contains: String || Number	// The value contains 
+ *		}
+ *	}
+ */
+
+function isValid(data, model) {
+	if(!model.value) {
+		return true;
+	}
+
+	// Data is different than equals
+	if(model.value.eq) {
+		if(typeof(data) === typeof(model.value.eq) && data !== model.value.eq) {
+			// Same data type and different values
+			return false;
+		} else { 
+			// Different types: Try to convert one to other.
+			var parsed = data;
+			var type = typeof(model.value.eq);
+			switch(type.toLowerCase()) {
+				case 'string':
+					parsed = String(data);
+					break;
+				case 'number':
+					parsed = Number(data);
+					break;
+				case 'boolean':
+					parsed = Boolean(data);
+					break;
+			}
+
+			if(data !== model.value.eq) {
+				return false;
+			}
+		}
+	}
+
+	// Data is higher than max 
+	if(model.value.max && Number(data) > Number(model.value.max)) {
+		return false;
+	}
+
+	// Data is lower than min
+	if(model.value.min && Number(data) < Number(model.value.min)) {
+		return false;
+	}
+
+	// Data does not contain something
+	if(model.value.contains && data.indexOf(model.value.contains) === -1) {
+		return false;
+	}
+
+	return true;
+}
+
+module.exports = isValid;

test.js

@@ -7,21 +7,50 @@ var model = {
 		length: {		// For now, length do nothng.
 			max: 10,
 			min: 1
+		},
+		value: {
+			eq: 'Paco'
 		}
 	},
 	surname: {
 		type: 'string',
 		length: {		// For now, length do nothng.
 			max: 3,
 			min: 1
+		},
+		value: {
+			contains: 'os'
+		}
+	},
+	age: {
+		type: 'number',
+		value: {
+			max: 95,
+			min: 18
+		}
+	},
+	dni: {
+		type: 'string',
+		value: {
+			max: 95,
+			min: 18
+		},
+		func: function startOnFive(value) {
+			if(value.charAt(0) === '5') {
+				return true;
+			}
+
+			return false;
 		}
 	}
 };
 var user = Modelate('User').model(model);
 
 var data = {
 	name: 'Paco',
-	surname: 'santos'	// Surname shall be removed
+	surname: 'santos',
+	age: 19,
+	dni: '41402430A'
 };
 var result = user.modelate(data);