feat(utils): add flatObject and normalizeFlattedObject functions

Author: wewoor

src/common/utils.ts

@@ -32,3 +32,73 @@ export function mergeFunctions(...funcs) {
 export function randomId() {
     return Date.now() + Math.round(Math.random() * 1000);
 }
+
+export function mergeObjects(source: object, target: object) {
+    for (const prop in target) {
+        if (typeof source[prop] === 'object' && target[prop]) {
+            source[prop] = mergeObjects(source[prop], target[prop]);
+        } else {
+            source[prop] = target[prop];
+        }
+    }
+    return source;
+}
+
+/**
+ * It's used convert an object to a flatted object,
+ * eg: { a: { b: 'test' }}, result is : { 'a.b': 'test' }
+ * @param target flat target
+ */
+export function flatObject(target: object): object {
+    const flatted = {};
+    const recurse = (parent: string, target: object) => {
+        for (const prop in target) {
+            if (prop) {
+                const value = target[prop];
+                const path = parent ? `${parent}.${prop}` : prop;
+                if (typeof value === 'object') {
+                    recurse(path, value);
+                } else {
+                    flatted[path] = value;
+                }
+            }
+        }
+    };
+    recurse('', target);
+    return flatted;
+}
+
+/**
+ * It's used convert a flatted object to a normal object,
+ *  eg: { 'a.b': 'test' }, result is : { a: { b: 'test' }}
+ * @param target flat target
+ */
+export function normalizeFlattedObject(target: object): object {
+    let normalized = {};
+
+    for (const prop in target) {
+        if (prop) {
+            const flattedProps = prop.split('.');
+            let prevProp = '';
+            let root = {};
+            let prevObj = root;
+            for (let i = 0; i < flattedProps.length; ++i) {
+                if (i === flattedProps.length) break;
+                const key = flattedProps[i];
+                const current = { [key]: '' };
+
+                if (prevProp) {
+                    prevObj[prevProp] = current;
+                }
+                prevObj = current;
+                prevProp = key;
+                if (i === 0) {
+                    root = current;
+                }
+            }
+            prevObj[prevProp] = target[prop];
+            normalized = mergeObjects(normalized, root);
+        }
+    }
+    return normalized;
+}