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October 5, 2019 04:01
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Small validation library
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| function validate (value, validators, message = 'Invalid value') { | |
| validators = [].concat(validators) | |
| if (typeof message !== 'string') { | |
| throw Object.assign( | |
| new Error('Argument "message" must be a string'), | |
| { | |
| name: 'ArgumentError', | |
| propertyName: 'message', | |
| propertyValue: message | |
| } | |
| ) | |
| } | |
| if (validators.some(validator => typeof validator !== 'function')) { | |
| throw Object.assign( | |
| new Error('Argument "validators" must be an array of functions'), | |
| { | |
| name: 'ArgumentError', | |
| propertyName: 'validators', | |
| propertyValue: validators | |
| } | |
| ) | |
| } | |
| const result = validators.reduce((result, validator) => { | |
| if (!result.success) return result | |
| result = validator(result.value) | |
| if (typeof result !== 'boolean' && Object(result) !== result) { | |
| throw Object.assign( | |
| new Error('Validator function result is invalid'), | |
| { | |
| name: 'ValidationError', | |
| result | |
| } | |
| ) | |
| } | |
| return typeof result === 'boolean' | |
| ? { value, success: result, message } | |
| : { message, ...result, success: !!result.success } | |
| }, { value, success: true, message }) | |
| return result | |
| } | |
| validate.pointer = function validatePointer (jsonPointer, validators, message) { | |
| return obj => { | |
| if (JSONPointer.isJSONPointer(jsonPointer)) { | |
| const value = JSONPointer.get(jsonPointer, obj) | |
| return { | |
| ...validate(value, validators, message), | |
| pointer: jsonPointer | |
| } | |
| } else { | |
| throw Object.assign( | |
| new Error('Argument "jsonPointer" is invalid'), | |
| { | |
| name: 'ArgumentError', | |
| propertyName: 'jsonPointer', | |
| propertyValue: jsonPointer | |
| } | |
| ) | |
| } | |
| } | |
| } |
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