chrislaughlin · February 3, 2022 20:34 · Feb 3, 2022
diff --git a/pattern-matching.js b/pattern-matching.js
@@ -0,0 +1,82 @@
+import flatten from 'flat';
+import objPath from 'object-path';
+
+
+const _matchKeys = (matchOn, matchWith) => {
+    const matchWithPaths = Object.keys(flatten(matchWith));
+    const matchWithValues = matchWithPaths.map(path => {
+        return objPath.get(matchWith, path);
+    })
+    const matchOnValues = matchWithPaths.map(path => {
+        return objPath.get(matchOn, path);
+    })
+
+    return matchOnValues.every((value, index) => {
+        return value === matchWithValues[index];
+    })
+}
+
+
+const _with = matchOn => (matchWith, onMatch) => {
+    const jsonMatchOn = JSON.stringify(matchOn);
+    const jsonMatchWith = JSON.stringify(matchWith);
+    // If the whole object matches
+    if (jsonMatchOn === jsonMatchWith) {
+        return onMatch();
+    }
+
+    if (_matchKeys(matchOn, matchWith)) {
+        return onMatch();
+    }
+
+}
+
+
+const match = (matchOn) => {
+    return {
+        with: _with(matchOn)
+    }
+}
+
+//Main useage
+const myObj = {
+    name: 'chris'
+};
+
+match(myObj)
+    .with({name: 'chris'}, () => console.log('matched with Chris'));
+//matched with Chris
+
+match(myObj)
+    .with({name: 'john'}, () => console.log('matched with John'));
+//no match
+
+const myObj1 = {
+    status: '200',
+    response: {
+        data: 'hello drunk world',
+        headers: [
+            'Content-Type: text/plain'
+        ],
+        forward: false,
+        foo: {
+            bar: {
+                baz: 'hello'
+            }
+        }
+    }
+}
+
+match(myObj1).with(
+    { 
+        response: { 
+            foo: {
+                bar: {
+                    baz: 'hello'
+                }
+            }
+        } 
+    },
+    () => console.log('matched'),
+);
+//matched