planning

node_modules/@mapbox/mapbox-gl-style-spec/validate/validate.js

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+// @flow
+
+import extend from '../util/extend.js';
+import {unbundle, deepUnbundle} from '../util/unbundle_jsonlint.js';
+import {isExpression} from '../expression/index.js';
+import {isFunction} from '../function/index.js';
+
+import validateFunction from './validate_function.js';
+import validateExpression from './validate_expression.js';
+import validateObject from './validate_object.js';
+import validateArray from './validate_array.js';
+import validateBoolean from './validate_boolean.js';
+import validateNumber from './validate_number.js';
+import validateColor from './validate_color.js';
+import validateEnum from './validate_enum.js';
+import validateFilter from './validate_filter.js';
+import validateLayer from './validate_layer.js';
+import validateSource from './validate_source.js';
+import validateLight from './validate_light.js';
+import validateTerrain from './validate_terrain.js';
+import validateFog from './validate_fog.js';
+import validateString from './validate_string.js';
+import validateFormatted from './validate_formatted.js';
+import validateImage from './validate_image.js';
+import validateProjection from './validate_projection.js';
+
+import type {StyleReference} from '../reference/latest.js';
+import type {StyleSpecification} from '../types.js';
+import type ValidationError from '../error/validation_error.js';
+
+const VALIDATORS = {
+    '*'() {
+        return [];
+    },
+    'array': validateArray,
+    'boolean': validateBoolean,
+    'number': validateNumber,
+    'color': validateColor,
+    'enum': validateEnum,
+    'filter': validateFilter,
+    'function': validateFunction,
+    'layer': validateLayer,
+    'object': validateObject,
+    'source': validateSource,
+    'light': validateLight,
+    'terrain': validateTerrain,
+    'fog': validateFog,
+    'string': validateString,
+    'formatted': validateFormatted,
+    'resolvedImage': validateImage,
+    'projection': validateProjection
+};
+
+// Main recursive validation function. Tracks:
+//
+// - key: string representing location of validation in style tree. Used only
+//   for more informative error reporting.
+// - value: current value from style being evaluated. May be anything from a
+//   high level object that needs to be descended into deeper or a simple
+//   scalar value.
+// - valueSpec: current spec being evaluated. Tracks value.
+// - styleSpec: current full spec being evaluated.
+export type ValidationOptions = {
+    key: string;
+    value: Object;
+    valueSpec: Object;
+    style: $Shape<StyleSpecification>;
+    styleSpec: StyleReference;
+}
+
+export default function validate(options: ValidationOptions): Array<ValidationError> {
+    const value = options.value;
+    const valueSpec = options.valueSpec;
+    const styleSpec = options.styleSpec;
+
+    if (valueSpec.expression && isFunction(unbundle(value))) {
+        return validateFunction(options);
+
+    } else if (valueSpec.expression && isExpression(deepUnbundle(value))) {
+        return validateExpression(options);
+
+    } else if (valueSpec.type && VALIDATORS[valueSpec.type]) {
+        return VALIDATORS[valueSpec.type](options);
+
+    } else {
+        const valid = validateObject(extend({}, options, {
+            valueSpec: valueSpec.type ? styleSpec[valueSpec.type] : valueSpec
+        }));
+        return valid;
+    }
+}