Prettify the regroup code

src/if-run/lib/regroup.ts

@@ -7,93 +7,82 @@ import {validate} from '../../common/util/validations';
 import {STRINGS} from '../config';
 
 const {InvalidGroupingError} = ERRORS;
-
 const {INVALID_GROUP_KEY, REGROUP_ERROR} = STRINGS;
 
 /**
- * Grouping strategy.
+ * Creates structure to insert inputs by groups.
  */
-export const Regroup = (
-  inputs: PluginParams[],
-  outputs: PluginParams[],
+const appendGroup = (
+  value: PluginParams,
+  object: any,
+  target: string,
   groups: string[]
-) => {
-  /**
-   * Creates structure to insert inputs by groups.
-   */
-  const appendGroup = (
-    value: PluginParams,
-    object: any,
-    target: string,
-    groups: string[]
-  ) => {
-    if (groups.length > 0) {
-      const group = groups.shift() as string;
-
-      object.children = object.children ?? {};
-      object.children[group] = object.children[group] ?? {};
+): any => {
+  if (groups.length === 0) {
+    object[target] = object[target] || [];
+    object[target].push(value);
+    return object;
+  }
 
-      if (groups.length === 0) {
-        if (
-          object.children[group][target] &&
-          object.children[group][target].length > 0
-        ) {
-          object.children[group][target].push(value);
-        } else {
-          object.children[group][target] = [value];
-        }
-      }
+  const group = groups.shift()!;
+  object.children = object.children || {};
+  object.children[group] = object.children[group] || {};
 
-      appendGroup(value, object.children[group], target, groups);
-    }
+  return appendGroup(value, object.children[group], target, groups);
+};
 
-    return object;
-  };
+/**
+ * Validates the groups array.
+ */
+const validateGroups = (groups: string[]): string[] => {
+  const inputData = {regroup: groups};
+  const validationSchema = z.record(
+    z.string(),
+    z.array(z.string(), {message: REGROUP_ERROR}).min(1)
+  );
 
-  /**
-   * Validates groups array.
-   */
-  const validateGroups = (regroup: string[]) => {
-    const inputData = {regroup};
-    const validationSchema = z.record(
-      z.string(),
-      z.array(z.string(), {message: REGROUP_ERROR}).min(1)
-    );
+  validate(validationSchema, inputData);
 
-    validate(validationSchema, inputData);
+  return groups;
+};
 
-    return groups;
-  };
+/**
+ * Looks up a group key value in the input.
+ */
+const lookupGroupKey = (input: PluginParams, groupKey: string): string => {
+  if (!input[groupKey]) {
+    throw new InvalidGroupingError(INVALID_GROUP_KEY(groupKey));
+  }
 
-  /**
-   * Interates over inputs, grabs group values for each one.
-   * Based on grouping, initializes the structure.
-   */
+  return input[groupKey];
+};
 
+/**
+ * Regroups inputs and outputs based on the given group keys.
+ */
+export const Regroup = (
+  inputs: PluginParams[],
+  outputs: PluginParams[],
+  groups: string[]
+): any => {
   const validatedGroups = validateGroups(groups);
 
-  const lookupGroupKey = (input: PluginParams, groupKey: string) => {
-    if (!input[groupKey]) {
-      throw new InvalidGroupingError(INVALID_GROUP_KEY(groupKey));
+  const appendToAccumulator = (
+    items: PluginParams[],
+    acc: any,
+    target: string
+  ) => {
+    for (const item of items) {
+      const groupsWithData = validatedGroups.map(groupKey =>
+        lookupGroupKey(item, groupKey)
+      );
+      appendGroup(item, acc, target, groupsWithData);
     }
-
-    return input[groupKey];
   };
 
-  let acc = {} as any;
-  for (const input of inputs) {
-    const groupsWithData = validatedGroups.map(groupKey =>
-      lookupGroupKey(input, groupKey)
-    );
-    acc = appendGroup(input, acc, 'inputs', groupsWithData);
-  }
-
-  for (const output of outputs) {
-    const groupsWithData = validatedGroups.map(groupKey =>
-      lookupGroupKey(output, groupKey)
-    );
-    acc = appendGroup(output, acc, 'outputs', groupsWithData);
-  }
+  const acc = {} as any;
+  appendToAccumulator(inputs, acc, 'inputs');
+  appendToAccumulator(outputs, acc, 'outputs');
 
   return acc.children;
 };