From 0b97b0ee2575d757de01992f2cd9bb0d2d08e023 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=82=A2=E3=83=AC=E3=82=AF=E3=82=B5=E3=83=B3=E3=83=80?=
 =?UTF-8?q?=E3=83=BC=2Eeth?= <gpg@pavlovcik.com>
Date: Wed, 9 Oct 2024 06:15:21 +0900
Subject: [PATCH] feat: no empty strings

---
 .github/workflows/no-empty-strings.yml | 71 ++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 .github/workflows/no-empty-strings.yml

diff --git a/.github/workflows/no-empty-strings.yml b/.github/workflows/no-empty-strings.yml
new file mode 100644
index 0000000..41f1f1c
--- /dev/null
+++ b/.github/workflows/no-empty-strings.yml
@@ -0,0 +1,71 @@
+name: Check for Empty Strings
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  check-empty-strings:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Get GitHub App token
+        uses: tibdex/github-app-token@v1.7.0
+        id: get_installation_token
+        with:
+          app_id: ${{ secrets.APP_ID }}
+          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+
+      - name: Find empty strings
+        id: find-empty-strings
+        run: |
+          # Get the base branch (usually main or master)
+          BASE_BRANCH=$(gh pr view ${{ github.event.pull_request.number }} --json baseRefName --jq .baseRefName)
+
+          # Get the list of changed files in the PR
+          CHANGED_FILES=$(gh pr diff ${{ github.event.pull_request.number }} --name-only)
+
+          # Initialize empty string for results
+          EMPTY_STRINGS=""
+
+          # Loop through changed files
+          for file in $CHANGED_FILES; do
+            if [[ $file =~ \.(ts|tsx)$ ]]; then
+              # Get the diff for this file
+              DIFF=$(gh pr diff ${{ github.event.pull_request.number }} --color never -- $file)
+
+              # Find added lines with empty strings
+              ADDED_EMPTY=$(echo "$DIFF" | grep -n "^+" | grep -E "(''{2}|\"\"{2})" | sed "s/^+//g" | sed "s/^/${file}:/")
+
+              # Append results
+              if [ ! -z "$ADDED_EMPTY" ]; then
+                EMPTY_STRINGS+="$ADDED_EMPTY"$'\n'
+              fi
+            fi
+          done
+
+          # Output results
+          echo "EMPTY_STRINGS<<EOF" >> $GITHUB_OUTPUT
+          echo "$EMPTY_STRINGS" >> $GITHUB_OUTPUT
+          echo "EOF" >> $GITHUB_OUTPUT
+        env:
+          GH_TOKEN: ${{ steps.get_installation_token.outputs.token }}
+
+      - name: Comment on PR
+        uses: actions/github-script@v6
+        if: steps.find-empty-strings.outputs.EMPTY_STRINGS
+        with:
+          github-token: ${{ steps.get_installation_token.outputs.token }}
+          script: |
+            const emptyStrings = process.env.EMPTY_STRINGS.trim().split('\n');
+            if (emptyStrings.length > 0) {
+              const body = `### Empty Strings Found\n\nPlease review the following lines containing empty strings:\n\n${emptyStrings.map(line => `- \`${line}\``).join('\n')}`;
+              github.rest.issues.createComment({
+                issue_number: context.issue.number,
+                owner: context.repo.owner,
+                repo: context.repo.name,
+                body: body
+              });
+            }