move comparators from scm-review-plugin to ui-components

scm-ui/ui-components/src/comparators.ts

@@ -0,0 +1,75 @@
+const isUndefined = (o: any, key: string, nested?: string) => {
+  if (typeof o === "undefined" || typeof o[key] === "undefined") {
+    return true;
+  }
+  if (nested) {
+    return typeof o[key][nested] === "undefined";
+  }
+  return false;
+};
+
+export const byKey = (key: string) => {
+  return (a: any, b: any) => {
+    if (isUndefined(a, key)) {
+      return 1;
+    }
+
+    if (isUndefined(b, key)) {
+      return 0;
+    }
+
+    if (a[key] < b[key]) {
+      return -1;
+    } else if (a[key] > b[key]) {
+      return 1;
+    } else {
+      return 0;
+    }
+  };
+};
+
+export const byValueLength = (key: string) => {
+  return (a: any, b: any) => {
+    if (isUndefined(a, key)) {
+      return 1;
+    }
+
+    if (isUndefined(b, key)) {
+      return 0;
+    }
+
+    if (a[key].length < b[key].length) {
+      return -1;
+    } else if (a[key].length > b[key].length) {
+      return 1;
+    } else {
+      return 0;
+    }
+  };
+};
+
+export const byNestedKeys = (key: string, nestedKey: string) => {
+  return (a: any, b: any) => {
+    if (isUndefined(a, key, nestedKey)) {
+      return 1;
+    }
+
+    if (isUndefined(b, key, nestedKey)) {
+      return 0;
+    }
+
+    if (a[key][nestedKey] < b[key][nestedKey]) {
+      return -1;
+    } else if (a[key][nestedKey] > b[key][nestedKey]) {
+      return 1;
+    } else {
+      return 0;
+    }
+  };
+};
+
+export default {
+  byKey,
+  byValueLength,
+  byNestedKeys
+};