Validators help ensure that user input meets certain criteria or constraints. Below are some examples of validator functions:

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Validators

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Pattern

Checks if the processed value matches a specific regular expression.

text: Property.LongText({
    displayName: 'Text',
    required: true,
    processors: [],
    validators: [Validators.pattern(/^[a-zA-Z0-9]+$/);],
})

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Max Length

Verifies if the processed string length is within a specified maximum limit.

text: Property.LongText({
    displayName: 'Text',
    required: true,
    processors: [],
    validators: [Validators.maxLength(100)],
})

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Min Length

Verifies if the processed string length is within a specified minimum limit.

text: Property.LongText({
    displayName: 'Text',
    required: true,
    processors: [],
    validators: [Validators.minLength(41)],
})

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Min Value

Ensures that the processed numeric value is greater than or equal to a specified minimum.

age: Property.Number({
    displayName: 'Age',
    required: true,
    processors: [],
    validators: [Validators.minValue(100)],
})

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Max Value

Ensures that the processed numeric value is less than or equal to a specified maximum.

count: Property.Number({
    displayName: 'Count',
    required: true,
    processors: [],
    validators: [Validators.maxValue(7)],
})

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In Range

Checks if the processed numeric value falls within a specified range.

score: Property.Number({
    displayName: 'Score',
    required: true,
    processors: [],
    validators: [Validators.inRange(0, 100)], // The range is inclusive (0 to 100).
})

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One Of

Validates whether the processed value is one of the specified values.

fruit: Property.Text({
    displayName: 'Fruit',
    required: true,
    processors: [],
    validators: [Validators.oneOf(["apple", "banana", "orange"])],
})

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Number

Validates whether the processed value is a valid number.

quantity: Property.Number({
    displayName: 'Quantity',
    required: true,
    processors: [],
    validators: [Validators.number],
})

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Non Zero

Validates whether the processed value is strictly NOT zero. Designed to be used with Validators.number

numberToDivideBy: Property.Number({
    displayName: 'Divide by',
    required: true,
    processor: [],
    validators: [Validators.number, Validators.nonZero]
})

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Image

Verifies whether the processed value is a valid image file based on its extension.

imageFile: Property.File({
    displayName: 'Image File',
    required: true,
    processors: [],
    validators: [Validators.image],
})

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File

Ensures that the processed value is a valid file.

documentFile: Property.File({
    displayName: 'Document File',
    required: true,
    processors: [],
    validators: [Validators.file],
})

​
Email

Validates whether the processed value is a valid email address.

email: Property.Text({
    displayName: 'Email',
    required: true,
    processors: [],
    validators: [Validators.email],
})

​
URL

Ensures that the processed value is a valid URL.

websiteUrl: Property.Text({
    displayName: 'Website URL',
    required: true,
    processors: [],
    validators: [Validators.url],
})

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Datetime ISO

Validates whether the processed value is a valid ISO-formatted date and time.

eventDate: Property.DateTime({
    displayName: 'Event Date',
    required: true,
    processors: [],
    validators: [Validators.datetimeIso],
})

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Custom

Example:

Note: The custom validator allows you to define your own validation logic and error message. It can be used to perform complex validations beyond the provided built-in validators.

const customValidator = {
    type: ValidationInputType.STRING,
    fn: (property, processedValue, userInput) => {
        // Your custom validation logic here
        if (validationFails) {
            return "Validation Error: Your custom error message.";
        }
        return null;
    }
};

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Processors

Processors act as data transformers, enabling you to transform or process user input before further processing.

To add a custom processor, you can define a function with this type ProcessorFn that takes two parameters: The function should return the processed value. Here’s an example:

const customProcessor: ProcessorFn<any, any> = (property, value) => {
    // Your custom processing logic here
    return processedValue;
}

text: Property.LongText({
    displayName: 'Text',
    required: true,
    processors: [customProcessor],
    validators: [],
})
PropsFlow Control