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Validator.js
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| class Validator { | |
| schema = null; | |
| constructor(schema) { | |
| this.schema = schema; | |
| } | |
| run(values) { | |
| const schema = this.schema; | |
| const errors = {}; | |
| const fields = Object.keys(schema); | |
| fields.forEach(field => { | |
| let errorMessage = null; | |
| const attr = schema[field]; | |
| let value = values[field]; | |
| if (typeof value === "string") { | |
| value = value.trim(); | |
| } | |
| if (attr.length) { | |
| const length = String(value).length; | |
| if (length < attr.length.min) { | |
| errorMessage = "The value is too short!"; | |
| } | |
| if (length > attr.length.max) { | |
| errorMessage = "The value is too long!"; | |
| } | |
| } | |
| // Custom | |
| if (attr.custom) { | |
| errorMessage = this[attr.custom](field, values); | |
| } | |
| // Type | |
| if (attr.type) { | |
| if (typeof value !== attr.type) { | |
| errorMessage = "Invalid data type!"; | |
| } | |
| } | |
| // include | |
| if (attr.include && Array.isArray(attr.include)) { | |
| if (!attr.include.includes(value)) { | |
| errorMessage = "Invalid value!"; | |
| } | |
| } | |
| // exclude | |
| if (attr.exclude && Array.isArray(attr.exclude)) { | |
| if (attr.exclude.includes(value)) { | |
| errorMessage = "Invalid value!"; | |
| } | |
| } | |
| // inBetween | |
| if (attr.inBetween) { | |
| const valueInBetween = value * 1; | |
| if (typeof valueInBetween !== "number" || isNaN(valueInBetween)) { | |
| errorMessage = "Invalid data type!"; | |
| } else { | |
| if (attr.inBetween.min && valueInBetween < attr.inBetween.min) { | |
| errorMessage = "Out of range!"; | |
| } | |
| if (attr.inBetween.max && valueInBetween > attr.inBetween.max) { | |
| errorMessage = "Out of range!"; | |
| } | |
| } | |
| } | |
| if (attr.required) { | |
| if (!value) { | |
| errorMessage = `${attr.name} is required!`; | |
| } | |
| } | |
| if (errorMessage) { | |
| errors[field] = errorMessage; | |
| } | |
| }); | |
| return errors; | |
| } | |
| validateEmail(field, allValues) { | |
| if (!/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i.test(allValues[field])) { | |
| return "Invalid email address"; | |
| } | |
| return false; | |
| } | |
| } | |
| export default Validator; | |
| // Scheme | |
| export const schema = { | |
| someField: { | |
| name: "Field Name", | |
| type: "number", | |
| required: true, | |
| inBetween: { | |
| min: 1.5, | |
| max: null | |
| } | |
| }, | |
| : | |
| : | |
| } |
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