graphql-scalars
Version:
A collection of scalar types not included in base GraphQL.
61 lines (60 loc) • 2.47 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.GraphQLLatitude = void 0;
// Inspired by Geolib: https://github.com/manuelbieh/geolib
const graphql_1 = require("graphql");
const error_js_1 = require("../error.js");
const utilities_js_1 = require("./utilities.js");
// Minimum latitude
const MIN_LAT = -90.0;
// Maximum latitude
const MAX_LAT = 90.0;
// See https://en.wikipedia.org/wiki/Decimal_degrees#Precision
const MAX_PRECISION = 8;
const validate = (value, ast) => {
// Check if value is a string or a number
if ((typeof value !== 'string' && typeof value !== 'number') ||
value === null ||
typeof value === 'undefined' ||
Number.isNaN(value)) {
throw (0, error_js_1.createGraphQLError)(`Value is neither a number nor a string: ${value}`, ast ? { nodes: ast } : undefined);
}
if ((0, utilities_js_1.isDecimal)(value)) {
const decimalValue = typeof value === 'string' ? Number.parseFloat(value) : value;
if (decimalValue < MIN_LAT || decimalValue > MAX_LAT) {
throw (0, error_js_1.createGraphQLError)(`Value must be between ${MIN_LAT} and ${MAX_LAT}: ${value}`, ast ? { nodes: ast } : undefined);
}
return Number.parseFloat(decimalValue.toFixed(MAX_PRECISION));
}
if ((0, utilities_js_1.isSexagesimal)(value)) {
return validate((0, utilities_js_1.sexagesimalToDecimal)(value));
}
throw (0, error_js_1.createGraphQLError)(`Value is not a valid latitude: ${value}`, ast ? { nodes: ast } : undefined);
};
exports.GraphQLLatitude = new graphql_1.GraphQLScalarType({
name: `Latitude`,
description: `A field whose value is a valid decimal degrees latitude number (53.471): https://en.wikipedia.org/wiki/Latitude`,
serialize(value) {
return validate(value);
},
parseValue(value) {
return validate(value);
},
parseLiteral(ast) {
if (ast.kind !== graphql_1.Kind.FLOAT && ast.kind !== graphql_1.Kind.STRING) {
throw (0, error_js_1.createGraphQLError)(`Can only validate floats or strings as latitude but got a: ${ast.kind}`, {
nodes: [ast],
});
}
return validate(ast.value, ast);
},
extensions: {
codegenScalarType: 'string | number',
jsonSchema: {
title: 'Latitude',
type: 'number',
minimum: MIN_LAT,
maximum: MAX_LAT,
},
},
});