Add coding standards and psalm checks on PRs (#620)

.github/workflows/pr.yaml

@@ -0,0 +1,95 @@
+name: "Check SDK"
+
+on:
+  pull_request:
+    paths:
+      - '.github/workflows/pr.yaml'
+      - 'src/**'
+
+jobs:
+  psalm:
+    name: "Psalm"
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version: ['8.0', '8.1', '8.2']
+
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+
+      - name: "Install PHP w/ Extensions"
+        uses: rebilly/setup-php@main
+        with:
+          php-version: ${{ matrix.php-version }}
+          extensions: mbstring, intl, curl, json
+          tools: composer:v2
+
+      - name: "Get composer cache directory"
+        id: composer-cache
+        run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+      - uses: actions/cache@v3
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-
+
+      - name: "Install dependencies"
+        run: composer install --no-interaction --no-scripts --no-suggest
+
+      - name: "Run tests"
+        run: vendor/bin/psalm
+
+  cs:
+    name: "Coding Standards"
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version: ['8.0', '8.1', '8.2']
+
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+
+      - name: "Install PHP w/ Extensions"
+        uses: rebilly/setup-php@main
+        with:
+          php-version: ${{ matrix.php-version }}
+          extensions: mbstring, intl, curl, json
+          tools: composer:v2
+
+      - name: "Get composer cache directory"
+        id: composer-cache
+        run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+      - uses: actions/cache@v3
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-
+
+      - name: "Install dependencies"
+        run: composer install --no-interaction --no-scripts --no-suggest
+
+      - uses: actions/cache@v3
+        with:
+          path: .php-cs-fixer.cache
+          key: ${{ runner.os }}-cs-fixer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cs-fixer-
+
+      - name: "Run tests"
+        run: vendor/bin/php-cs-fixer fix -vv --dry-run

psalm.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0"?>
+<psalm
+    errorLevel="4"
+    resolveFromConfigFile="true"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    findUnusedBaselineEntry="true"
+    findUnusedCode="true"
+>
+    <projectFiles>
+        <directory name="src" />
+        <ignoreFiles>
+            <directory name="vendor" />
+        </ignoreFiles>
+    </projectFiles>
+    <issueHandlers>
+        <UnusedClass>
+            <errorLevel type="suppress">
+                <file name="src/CombinedService.php" />
+                <file name="src/CoreService.php" />
+                <file name="src/ReportsService.php" />
+                <file name="src/UsersService.php" />
+            </errorLevel>
+        </UnusedClass>
+        <PossiblyUnusedMethod errorLevel="suppress"/>
+        <UnusedMethod errorLevel="suppress"/>
+        <PossiblyUnusedReturnValue errorLevel="suppress"/>
+    </issueHandlers>
+</psalm>