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Destructures values from a `root` object based on one or more `nestedMaps` structures.
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| /** | |
| * Destructures values from a `root` object based on one or more `nestedMaps` | |
| * structures. | |
| * @param {Object} root | |
| * The root object or array containing the data to destructure. | |
| * @param {...NestedMap} nestedMaps | |
| * One or more nested mapping objects. Each key in the `NestedMap` is a | |
| * string, and each value is either: | |
| * - A string (which specifies the key in the result object), or | |
| * - A `NestedMap` (which specifies further nested extraction). | |
| * @returns {Record<string, any>} | |
| * An object containing the extracted values, with keys as specified by the | |
| * `nestedMaps`. | |
| * @throws {Error} | |
| * Throws an error if a recursive structure is detected in the `root` object. | |
| * @template {Record<string, string | NestedMap>} NestedMap | |
| */ | |
| function destruct(root, ...nestedMaps) { | |
| function recurse(root, nestedMap, seen) { | |
| for (const [key, value] of Object.entries(nestedMap)) { | |
| const rootValue = (+key < 0 && Array.isArray(root)) ? root.at(+key) : root[key]; | |
| if (typeof value !== 'object') { | |
| returnValue[value] = rootValue; | |
| } | |
| else if (rootValue != null) { | |
| if (seen.includes(rootValue)) { | |
| throw new Error('Cannot use a recursive structure as the nested map.'); | |
| } | |
| seen.push(rootValue); | |
| recurse(rootValue, value, seen); | |
| } | |
| } | |
| } | |
| // The object that will store the extracted values. | |
| const returnValue = {}; | |
| // Iterate over each nested map and apply the recursion | |
| for (const nestedMap of nestedMaps) { | |
| recurse(root, nestedMap, []); | |
| } | |
| return returnValue; | |
| } |
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| var data = { | |
| event: { | |
| app: "monday", | |
| type: "update_column_value", | |
| triggerTime: "2024-09-16T15:03:05.631Z", | |
| subscriptionId: 409408840, | |
| userId: -4, | |
| originalTriggerUuid: "1c097ddf26d7db04e785b6c3910812b6", | |
| boardId: 7438104037, | |
| groupId: "topics", | |
| pulseId: 7438104160, | |
| pulseName: "Item 1", | |
| columnId: "status", | |
| columnType: "color", | |
| columnTitle: "Status", | |
| value: { | |
| label: { | |
| index: 0, | |
| text: "Working on it", | |
| style: { | |
| color: "#fdab3d", | |
| border: "#e99729", | |
| var_name: "orange" | |
| }, | |
| is_done: false | |
| }, | |
| post_id: null | |
| }, | |
| previousValue: { | |
| label: { | |
| index: 5, | |
| text: null, | |
| style: { | |
| color: "#c4c4c4", | |
| border: "#b0b0b0", | |
| var_name: "grey" | |
| }, | |
| is_done: false | |
| }, | |
| post_id: null | |
| }, | |
| changedAt: 1726498985.1396656, | |
| isTopGroup: true, | |
| triggerUuid: "c48d7a18702d068c3a477cc8b7091b9c" | |
| }, | |
| people: [ | |
| 'Chris', | |
| 'Jamie', | |
| 'Stacey' | |
| ] | |
| }; | |
| console.log( | |
| extract( | |
| data, | |
| { | |
| people: { | |
| 0: 'firstPerson', | |
| '-1': 'lastPerson' | |
| }, | |
| event: { | |
| app: 'app', | |
| type: 'type', | |
| triggerTime: 'triggerTime', | |
| } | |
| }, | |
| {people: 'people'} | |
| ) | |
| ); |
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