117 lines
3.5 KiB
JavaScript
117 lines
3.5 KiB
JavaScript
import { OHIF } from 'meteor/ohif:core';
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class ObjectPath {
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/**
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* Set an object property based on "path" (namespace) supplied creating
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* ... intermediary objects if they do not exist.
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* @param object {Object} An object where the properties specified on path should be set.
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* @param path {String} A string representing the property to be set, e.g. "user.study.series.timepoint".
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* @param value {Any} The value of the property that will be set.
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* @return {Boolean} Returns "true" on success, "false" if any intermediate component of the supplied path
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* ... is not a valid Object, in which case the property cannot be set. No excpetions are thrown.
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*/
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static set(object, path, value) {
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let components = ObjectPath.getPathComponents(path),
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length = components !== null ? components.length : 0,
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result = false;
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if (length > 0 && ObjectPath.isValidObject(object)) {
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let i = 0,
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last = length - 1,
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currentObject = object;
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while (i < last) {
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let field = components[i];
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if (field in currentObject) {
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if (!ObjectPath.isValidObject(currentObject[field])) {
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break;
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}
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} else {
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currentObject[field] = {};
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}
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currentObject = currentObject[field];
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i++;
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}
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if (i === last) {
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currentObject[components[last]] = value;
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result = true;
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}
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}
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return result;
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}
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/**
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* Get an object property based on "path" (namespace) supplied traversing the object
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* ... tree as necessary.
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* @param object {Object} An object where the properties specified might exist.
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* @param path {String} A string representing the property to be searched for, e.g. "user.study.series.timepoint".
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* @return {Any} The value of the property if found. By default, returns the special type "undefined".
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*/
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static get(object, path) {
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let found, // undefined by default
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components = ObjectPath.getPathComponents(path),
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length = components !== null ? components.length : 0;
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if (length > 0 && ObjectPath.isValidObject(object)) {
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let i = 0,
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last = length - 1,
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currentObject = object;
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while (i < last) {
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let field = components[i];
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const isValid = ObjectPath.isValidObject(currentObject[field]);
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if (field in currentObject && isValid) {
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currentObject = currentObject[field];
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i++;
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} else {
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break;
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}
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}
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if (i === last && components[last] in currentObject) {
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found = currentObject[components[last]];
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}
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}
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return found;
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}
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/**
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* Check if the supplied argument is a real JavaScript Object instance.
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* @param object {Any} The subject to be tested.
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* @return {Boolean} Returns "true" if the object is a real Object instance and "false" otherwise.
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*/
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static isValidObject(object) {
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return (
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typeof object === 'object' &&
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object !== null &&
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object instanceof Object
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);
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}
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static getPathComponents(path) {
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return (typeof path === 'string' ? path.split('.') : null);
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}
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}
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OHIF.utils.ObjectPath = ObjectPath;
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