44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
'use strict';
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const positiveIntegerNumberRegExp = /^\d+$/;
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const integerNumberRegExp = /^-?\d+$/;
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const invalidZoomMessage = function (zoom) {
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return `Invalid zoom value (${zoom}). It should be an integer number greather than or equal to 0`;
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};
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const invalidCoordXMessage = function (x) {
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return `Invalid coodinate 'x' value (${x}). It should be an integer number`;
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};
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const invalidCoordYMessage = function (y) {
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return `Invalid coodinate 'y' value (${y}). It should be an integer number greather than or equal to 0`;
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};
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module.exports = function coordinates (validate = { z: true, x: true, y: true }) {
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return function coordinatesMiddleware (req, res, next) {
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const { z, x, y } = req.params;
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if (validate.z && !positiveIntegerNumberRegExp.test(z)) {
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const err = new Error(invalidZoomMessage(z));
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err.http_status = 400;
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return next(err);
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}
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// Negative values for x param are valid. The x param is wrapped
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if (validate.x && !integerNumberRegExp.test(x)) {
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const err = new Error(invalidCoordXMessage(x));
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err.http_status = 400;
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return next(err);
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}
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if (validate.y && !positiveIntegerNumberRegExp.test(y)) {
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const err = new Error(invalidCoordYMessage(y));
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err.http_status = 400;
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return next(err);
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}
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next();
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};
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};
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