From dead9527b45450e5b8a938605c3641f699631781 Mon Sep 17 00:00:00 2001
From: invakid404 <invakid404@riseup.net>
Date: Wed, 23 Jun 2021 10:31:36 +0300
Subject: [PATCH] feat: keep labels in a set and make them lowercase

---
 src/pullRequests.ts | 70 ++++++++++++++++++++++++++-------------------
 src/releaseNotes.ts |  2 +-
 src/transform.ts    |  8 +++---
 src/utils.ts        |  2 ++
 4 files changed, 47 insertions(+), 35 deletions(-)

diff --git a/src/pullRequests.ts b/src/pullRequests.ts
index 5b8c731..d523c91 100755
--- a/src/pullRequests.ts
+++ b/src/pullRequests.ts
@@ -2,6 +2,7 @@ import {Octokit, RestEndpointMethodTypes} from '@octokit/rest'
 import moment from 'moment'
 
 import * as core from '@actions/core'
+import {Unpacked} from './utils'
 
 export interface PullRequestInfo {
   number: number
@@ -12,13 +13,18 @@ export interface PullRequestInfo {
   mergeCommitSha: string
   author: string
   repoName: string
-  labels: string[]
+  labels: Set<string>
   milestone: string
   body: string
   assignees: string[]
   requestedReviewers: string[]
 }
 
+type PullData = RestEndpointMethodTypes['pulls']['get']['response']['data']
+
+type PullsListData =
+  RestEndpointMethodTypes['pulls']['list']['response']['data']
+
 export class PullRequests {
   constructor(private octokit: Octokit) {}
 
@@ -43,10 +49,11 @@ export class PullRequests {
         mergeCommitSha: pr.data.merge_commit_sha || '',
         author: pr.data.user?.login || '',
         repoName: pr.data.base.repo.full_name,
-        labels:
+        labels: new Set(
           pr.data.labels?.map(function (label) {
-            return label.name || ''
-          }) || [],
+            return label.name?.toLowerCase() || ''
+          }) || []
+        ),
         milestone: pr.data.milestone?.title || '',
         body: pr.data.body || '',
         assignees:
@@ -84,35 +91,10 @@ export class PullRequests {
     })
 
     for await (const response of this.octokit.paginate.iterator(options)) {
-      type PullsListData =
-        RestEndpointMethodTypes['pulls']['list']['response']['data']
       const prs: PullsListData = response.data as PullsListData
 
       for (const pr of prs.filter(p => !!p.merged_at)) {
-        mergedPRs.push({
-          number: pr.number,
-          title: pr.title,
-          htmlURL: pr.html_url,
-          baseBranch: pr.base.ref,
-          mergedAt: moment(pr.merged_at),
-          mergeCommitSha: pr.merge_commit_sha || '',
-          author: pr.user?.login || '',
-          repoName: pr.base.repo.full_name,
-          labels:
-            pr.labels?.map(function (label) {
-              return label.name || ''
-            }) || [],
-          milestone: pr.milestone?.title || '',
-          body: pr.body || '',
-          assignees:
-            pr.assignees?.map(function (asignee) {
-              return asignee?.login || ''
-            }) || [],
-          requestedReviewers:
-            pr.requested_reviewers?.map(function (reviewer) {
-              return reviewer?.login || ''
-            }) || []
-        })
+        mergedPRs.push(mapPullRequest(pr))
       }
 
       const firstPR = prs[0]
@@ -159,3 +141,31 @@ export function sortPullRequests(
   }
   return pullRequests
 }
+
+const mapPullRequest = (
+  pr: PullData | Unpacked<PullsListData>
+): PullRequestInfo => ({
+  number: pr.number,
+  title: pr.title,
+  htmlURL: pr.html_url,
+  baseBranch: pr.base.ref,
+  mergedAt: moment(pr.merged_at),
+  mergeCommitSha: pr.merge_commit_sha || '',
+  author: pr.user?.login || '',
+  repoName: pr.base.repo.full_name,
+  labels: new Set(
+    pr.labels?.map(function (label) {
+      return label.name?.toLowerCase() || ''
+    }) || []
+  ),
+  milestone: pr.milestone?.title || '',
+  body: pr.body || '',
+  assignees:
+    pr.assignees?.map(function (asignee) {
+      return asignee?.login || ''
+    }) || [],
+  requestedReviewers:
+    pr.requested_reviewers?.map(function (reviewer) {
+      return reviewer?.login || ''
+    }) || []
+})
diff --git a/src/releaseNotes.ts b/src/releaseNotes.ts
index aca1cdc..5d2e480 100755
--- a/src/releaseNotes.ts
+++ b/src/releaseNotes.ts
@@ -176,7 +176,7 @@ export class ReleaseNotes {
         mergeCommitSha: '',
         author: commit.author || '',
         repoName: '',
-        labels: [],
+        labels: new Set(),
         milestone: '',
         body: commit.message || '',
         assignees: [],
diff --git a/src/transform.ts b/src/transform.ts
index 75c0150..336ad40 100644
--- a/src/transform.ts
+++ b/src/transform.ts
@@ -39,7 +39,7 @@ export function buildChangelog(
           label = pr.body.replace(extractor.pattern, extractor.target)
         }
         if (label !== '') {
-          pr.labels.push(label)
+          pr.labels.add(label.toLowerCase())
         }
       }
     }
@@ -189,8 +189,8 @@ export function fillAdditionalPlaceholders(
   return transformed
 }
 
-function haveCommonElements(arr1: string[], arr2: string[]): Boolean {
-  return arr1.some(item => arr2.includes(item))
+function haveCommonElements(arr1: string[], arr2: Set<string>): Boolean {
+  return arr1.some(item => arr2.has(item))
 }
 
 function fillTemplate(pr: PullRequestInfo, template: string): string {
@@ -205,7 +205,7 @@ function fillTemplate(pr: PullRequestInfo, template: string): string {
   transformed = transformed.replace(/\${{AUTHOR}}/g, pr.author)
   transformed = transformed.replace(
     /\${{LABELS}}/g,
-    pr.labels?.join(', ') || ''
+    [...pr.labels]?.join(', ') || ''
   )
   transformed = transformed.replace(/\${{MILESTONE}}/g, pr.milestone || '')
   transformed = transformed.replace(/\${{BODY}}/g, pr.body)
diff --git a/src/utils.ts b/src/utils.ts
index 4096554..745b524 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -137,3 +137,5 @@ export function writeOutput(
     }
   }
 }
+
+export type Unpacked<T> = T extends (infer U)[] ? U : T