feat!: Adopt gRPC (#41)

PHP SDK utilized HTTP API due to some limitations related to code
generation. Now, using `buf` and some newly discovered tricks, it is
possible to generate php code from the gRPC protobuf definitions.

This PR re-designs the SDK to use `gRPC` with some changes breaking
backward compatibility.

### Supported [PHP versions](https://www.php.net/supported-versions.php)
- `8.1`
- `8.2`

resolves #38

---------

Signed-off-by: Oğuzhan Durgun <[email protected]>
Co-authored-by: Charith Ellawala <[email protected]>

.github/workflows/pr.yaml

@@ -11,12 +11,25 @@ jobs:
   lint:
     name: Run linters
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version: [ '8.1', '8.2' ]
+        experimental: [ false ]
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
 
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          coverage: xdebug
+          extensions: "grpc"
+
       - name: Install dependencies
-        run: composer install --prefer-dist --no-progress
+        run: composer install --prefer-dist --no-progress --no-suggest
 
       - name: Lint
         shell: bash
@@ -25,12 +38,24 @@ jobs:
   static-analysis:
     name: Run static analysis
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version: [ '8.1', '8.2' ]
+        experimental: [ false ]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
 
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          coverage: xdebug
+          extensions: "grpc"
+
       - name: Install dependencies
-        run: composer install --prefer-dist --no-progress
+        run: composer install --prefer-dist --no-progress --no-suggest
 
       - name: Statically analyze code
         shell: bash
@@ -50,24 +75,25 @@ jobs:
   unit-tests:
     name: Run unit tests
     needs: [ "lint" ]
-    runs-on: ${{ matrix.operating-system }}
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        php-version:
-          - "7.4"
-          - "8.1"
-        operating-system:
-          - "ubuntu-latest"
-        dependencies:
-          - "lowest"
-          - "highest"
+        php-version: [ '8.1', '8.2' ]
+        experimental: [ false ]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
 
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          coverage: xdebug
+          extensions: "grpc"
+
       - name: Install dependencies
-        run: composer install --prefer-dist --no-progress
+        run: composer install --prefer-dist --no-progress --no-suggest
 
       - name: Run docker-compose
         run: docker-compose up -d

Makefile

@@ -1,14 +1,21 @@
+SRC_DIR := "src"
+TESTS_DIR := "tests"
+PROTOS_DIR := "protos"
+
 .PHONY: all
-all: lint static-analysis validate-composer test
+all: generate lint static-analysis validate-composer test
+
+.PHONY: generate
+generate: generate-proto-code
 
 .PHONY: lint
 lint:
-	vendor/bin/parallel-lint --exclude .git --exclude .github --exclude build --exclude vendor .
+	vendor/bin/parallel-lint ${SRC_DIR}/Sdk ${TESTS_DIR}/Sdk
 
 .PHONY: static-analysis
 static-analysis:
 	vendor/bin/psalm
-	vendor/bin/phpstan analyse src tests
+	vendor/bin/phpstan analyse ${SRC_DIR}/Sdk ${TESTS_DIR}/Sdk
 
 .PHONY: validate-composer
 validate-composer:
@@ -18,4 +25,13 @@ validate-composer:
 test:
 	docker-compose up -d
 	vendor/bin/phpunit --no-coverage
-	docker-compose down
+	docker-compose down
+
+.PHONY: generate-proto-code
+generate-proto-code:
+	./fetch_protos.sh
+	sed -i.bak 's/syntax = "proto2"/syntax = "proto3"/' ${PROTOS_DIR}/validate/validate.proto
+	sed -i.bak 's/ \[default = true\];/;/' ${PROTOS_DIR}/validate/validate.proto
+	rm ${PROTOS_DIR}/validate/validate.proto.bak
+	rm -rf ${SRC_DIR}/Cerbos ${SRC_DIR}/GPBMetadata
+	buf generate ${PROTOS_DIR}