instances.yml

name: instances

on:
  push:
    branches:
      - develop
  workflow_dispatch:

jobs:
  instances: 
    name: Instances
    runs-on: ubuntu-latest
    steps:
    - name: Checkout
      uses: actions/checkout@v4

    - name: Query Instances
      run: |
        # Query the list of instances
        curl -H 'Content-Type: application/json' -X POST \
        -d '{"query": "query {nodes(softwarename: \"lemmy\") {domain active_users_monthly}}"}' https://api.fediverse.observer 2> /dev/null | \
        jq -r '.data.nodes | .[] | select(.active_users_monthly > 50) | .domain' > lemmy-instances.txt.tmp

        # Combine the output with the existing instances.txt file.
        sort lemmy-instances.txt lemmy-instances.txt.tmp | uniq -i > lemmy-instances.txt

        # Delete the temp file
        rm lemmy-instances.txt.tmp

        # Convert the text file to a dart file
        cat << EOF > lib/instances.dart
        const List<String> instances = [
        $(awk '{ print "  \047"$0"\047," }' lemmy-instances.txt)
        ];
        EOF

        # Put the instances in the Android manifest file
        manifestInstances="$(awk '{ print "              <data android:host=\""$0"\" />" }' lemmy-instances.txt)"
        inSection=false
        while IFS= read -r line; do
            if [[ $line == *"#AUTO_GEN_INSTANCE_LIST_DO_NOT_TOUCH#"* ]]; then
              inSection=true
            fi

            if [[ $line == *"#INSTANCE_LIST_END#"* ]]; then  
              echo "$manifestInstances" >> android/app/src/main/AndroidManifest-new.xml
              inSection=false
            fi

            if [[ $line == *"android:host"* ]]; then
              if [ "$inSection" = true ]; then
                continue
              fi
            fi

            echo "$line" >> android/app/src/main/AndroidManifest-new.xml
        done < android/app/src/main/AndroidManifest.xml
        mv android/app/src/main/AndroidManifest-new.xml android/app/src/main/AndroidManifest.xml

        # ---------- Safari Extension ----------
        totalLines=$(wc -l < lemmy-instances.txt)
        currentLine=0

        safariManifestInstances=""
        safariContentInstances=""
        
        # Generate the Safari extension domains used in manifest.json and content.js
        # It ignores the last comma in the list to generate proper json
        while IFS= read -r instance; do
            currentLine=$((currentLine + 1))

            if [ "$currentLine" -eq 1 ]; then
                # First line
                safariManifestInstances="                \"*://$instance/*\""
                safariContentInstances="    \"$instance\""
            elif [ "$currentLine" -eq "$totalLines" ]; then
                # Last line
                safariManifestInstances="$safariManifestInstances,\n                \"*://$instance/*\"\n"
                safariContentInstances="$safariContentInstances,\n    \"$instance\"\n"
            else
                safariManifestInstances="$safariManifestInstances,\n                \"*://$instance/*\""
                safariContentInstances="$safariContentInstances,\n    \"$instance\""
            fi
        done < lemmy-instances.txt
        
        # Generates the new manifest.json with the updated instances
        inSection=false
        while IFS= read -r line; do
        if [[ $line == *"matches\": ["* ]]; then
            inSection=true
        fi
        
        if [[ $line == "            ]" ]]; then 
            printf "$safariManifestInstances" >> "ios/Open In Thunder/Resources/manifest-new.json"
            inSection=false
        fi
        
        if [[ $line == *"*://"* ]]; then
            if [ "$inSection" = true ]; then
            continue
            fi
        fi
        
        echo "$line" >> "ios/Open In Thunder/Resources/manifest-new.json"
        done < "ios/Open In Thunder/Resources/manifest.json"
        mv "ios/Open In Thunder/Resources/manifest-new.json" "ios/Open In Thunder/Resources/manifest.json"
        
        # Generates the new content.js with the updated instances
        inSection=false
        while IFS= read -r line; do
        if [[ $line == *"let instances = ["* ]]; then
            inSection=true
        fi
        
        if [[ $line == "];" ]]; then 
            printf "$safariContentInstances" >> "ios/Open In Thunder/Resources/content-new.js"
            inSection=false
        fi
        
        if [[ $line == *"    \""* ]]; then
            if [ "$inSection" = true ]; then
            continue
            fi
        fi
        
        echo "$line" >> "ios/Open In Thunder/Resources/content-new.js"
        done < "ios/Open In Thunder/Resources/content.js"
        mv "ios/Open In Thunder/Resources/content-new.js" "ios/Open In Thunder/Resources/content.js"

    - name: Create Pull Request
      uses: peter-evans/create-pull-request@v6.0.1
      with:
          commit-message: Update instances
          title: Update instances
          body: This PR is updating `lemmy-instances.txt`, `instances.dart`, `AndroidManifest.xml`, `manifest.json` and `content.js` with the latest list of instances retrieved from fediverse.observer.
          branch: update-instances
          delete-branch: true
          author: GitHub <noreply@github.com>