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// @flow
import validate from './validate.js';
import ValidationError from '../error/validation_error.js';
import getType from '../util/get_type.js';
import {isFunction} from '../function/index.js';
import {unbundle, deepUnbundle} from '../util/unbundle_jsonlint.js';
import {supportsPropertyExpression} from '../util/properties.js';
import type {ValidationOptions} from './validate.js';
export type PropertyValidationOptions = ValidationOptions & {
objectKey: string;
layerType: string;
}
export default function validateProperty(options: PropertyValidationOptions, propertyType: string): Array<ValidationError> {
const key = options.key;
const style = options.style;
const styleSpec = options.styleSpec;
const value = options.value;
const propertyKey = options.objectKey;
const layerSpec = styleSpec[`${propertyType}_${options.layerType}`];
if (!layerSpec) return [];
const transitionMatch = propertyKey.match(/^(.*)-transition$/);
if (propertyType === 'paint' && transitionMatch && layerSpec[transitionMatch[1]] && layerSpec[transitionMatch[1]].transition) {
return validate({
key,
value,
valueSpec: styleSpec.transition,
style,
styleSpec
});
}
const valueSpec = options.valueSpec || layerSpec[propertyKey];
if (!valueSpec) {
return [new ValidationError(key, value, `unknown property "${propertyKey}"`)];
}
let tokenMatch;
if (getType(value) === 'string' && supportsPropertyExpression(valueSpec) && !valueSpec.tokens && (tokenMatch = /^{([^}]+)}$/.exec(value))) {
return [new ValidationError(
key, value,
`"${propertyKey}" does not support interpolation syntax\n` +
`Use an identity property function instead: \`{ "type": "identity", "property": ${JSON.stringify(tokenMatch[1])} }\`.`)];
}
const errors = [];
if (options.layerType === 'symbol') {
if (propertyKey === 'text-field' && style && !style.glyphs) {
errors.push(new ValidationError(key, value, 'use of "text-field" requires a style "glyphs" property'));
}
if (propertyKey === 'text-font' && isFunction(deepUnbundle(value)) && unbundle(value.type) === 'identity') {
errors.push(new ValidationError(key, value, '"text-font" does not support identity functions'));
}
}
return errors.concat(validate({
key: options.key,
value,
valueSpec,
style,
styleSpec,
expressionContext: 'property',
propertyType,
propertyKey
}));
}