From 2bca539f9f5a40b510861c62a3e9754914ad24e5 Mon Sep 17 00:00:00 2001
From: Yaroslav Serhieiev <noomorph@gmail.com>
Date: Fri, 10 Sep 2021 11:25:29 +0300
Subject: [PATCH] feat: simplify odometer result

---
 .husky/commit-msg             | 4 ++++
 .husky/pre-commit             | 4 ++++
 .husky/pre-push               | 4 ++++
 src/odometer/Odometer.ts      | 6 +++++-
 src/odometer/OdometerStats.ts | 4 ++--
 5 files changed, 19 insertions(+), 3 deletions(-)
 create mode 100755 .husky/commit-msg
 create mode 100755 .husky/pre-commit
 create mode 100755 .husky/pre-push

diff --git a/.husky/commit-msg b/.husky/commit-msg
new file mode 100755
index 0000000..0bd658f
--- /dev/null
+++ b/.husky/commit-msg
@@ -0,0 +1,4 @@
+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+npx --no-install commitlint --edit "$1"
diff --git a/.husky/pre-commit b/.husky/pre-commit
new file mode 100755
index 0000000..6e9bf51
--- /dev/null
+++ b/.husky/pre-commit
@@ -0,0 +1,4 @@
+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+npm run precommit
diff --git a/.husky/pre-push b/.husky/pre-push
new file mode 100755
index 0000000..42b62e5
--- /dev/null
+++ b/.husky/pre-push
@@ -0,0 +1,4 @@
+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+npm run prepush
diff --git a/src/odometer/Odometer.ts b/src/odometer/Odometer.ts
index e6302c0..17e9c88 100644
--- a/src/odometer/Odometer.ts
+++ b/src/odometer/Odometer.ts
@@ -8,7 +8,7 @@ export class Odometer<Context = unknown> {
   public getDifference(
     aSet: Intermediate<Context, Replacement<Context>>[],
     bSet: Intermediate<Context, Replacement<Context>>[],
-  ): OdometerStats<Context> {
+  ): OdometerStats<Context> | null {
     let minimalDistance = Number.POSITIVE_INFINITY;
     let aBest: Intermediate<Context, Replacement<Context>> | null = null;
     let bBest: Intermediate<Context, Replacement<Context>> | null = null;
@@ -29,6 +29,10 @@ export class Odometer<Context = unknown> {
       }
     }
 
+    if (aBest == null || bBest == null) {
+      return null;
+    }
+
     return {
       a: aBest,
       b: bBest,
diff --git a/src/odometer/OdometerStats.ts b/src/odometer/OdometerStats.ts
index 6f66636..8b349ea 100644
--- a/src/odometer/OdometerStats.ts
+++ b/src/odometer/OdometerStats.ts
@@ -2,7 +2,7 @@ import { Replacement } from '../multireplacer';
 import { Intermediate } from '../utils';
 
 export type OdometerStats<T> = {
-  a: Intermediate<T, Replacement<T>> | null;
-  b: Intermediate<T, Replacement<T>> | null;
+  a: Intermediate<T, Replacement<T>>;
+  b: Intermediate<T, Replacement<T>>;
   distance: number;
 };