Get rid of all transport types and settle on Protobuf (#25)

* Get rid of all transport types and settle on Protobuf

hope i don't regret this

* Update Cargo.toml

* Update agent.py

proto/messages.proto

@@ -1,29 +0,0 @@
-syntax = "proto3";
-
-package djls;
-
-// Commands we send to Python
-message ToAgent {
-  oneof command {
-    HealthCheck health_check = 1;
-    Shutdown shutdown = 2;
-  }
-}
-
-message HealthCheck {}
-message Shutdown {}
-
-// Responses we get back
-message FromAgent {
-  oneof message {
-    HealthCheckResponse health_check = 1;
-    Error error = 2;
-  }
-}
-
-message HealthCheckResponse {}
-
-message Error {
-  string message = 1;
-  string traceback = 2;  // Optional stack trace from Python
-}

proto/v1/check.proto

@@ -0,0 +1,23 @@
+syntax = "proto3";
+
+package djls.v1.check;
+
+message HealthRequest {}
+message HealthResponse {
+    bool passed = 1;
+    optional string error = 2;
+}
+
+message DjangoAvailableRequest {}
+message DjangoAvailableResponse {
+    bool passed = 1;
+    optional string error = 2;
+}
+
+message AppInstalledRequest {
+    string app_name = 1;
+}
+message AppInstalledResponse {
+    bool passed = 1;
+    optional string error = 2;
+}

proto/v1/django.proto

@@ -0,0 +1,15 @@
+syntax = "proto3";
+
+package djls.v1.django;
+
+// models
+message Project {
+    string version = 3;
+}
+
+// commands
+message GetProjectInfoRequest {}
+
+message GetProjectInfoResponse {
+    Project project = 1;
+}

proto/v1/messages.proto

@@ -0,0 +1,40 @@
+syntax = "proto3";
+
+package djls.v1.messages;
+
+import "v1/check.proto";
+import "v1/django.proto";
+import "v1/python.proto";
+
+message Request {
+    oneof command {
+        check.HealthRequest check__health = 1;
+        check.DjangoAvailableRequest check__django_available = 2;
+        check.AppInstalledRequest check__app_installed = 3;
+        python.GetEnvironmentRequest python__get_environment = 1000;
+        django.GetProjectInfoRequest django__get_project_info = 2000;
+    }
+}
+
+message Response {
+    oneof result {
+        check.HealthResponse check__health = 1;
+        check.DjangoAvailableResponse check__django_available = 2;
+        check.AppInstalledResponse check__app_installed = 3;
+        python.GetEnvironmentResponse python__get_environment = 1000;
+        django.GetProjectInfoResponse django__get_project_info = 2000;
+        Error error = 9000;
+    }
+}
+
+message Error {
+    Code code = 1;
+    string message = 2;
+    string traceback = 3;
+    enum Code {
+        UNKNOWN = 0;
+        INVALID_REQUEST = 1;
+        PYTHON_ERROR = 2;
+        DJANGO_ERROR = 3;
+    }
+}

proto/v1/python.proto

@@ -0,0 +1,80 @@
+syntax = "proto3";
+
+package djls.v1.python;
+
+// models
+message Python {
+    Os os = 1;
+    Site site = 2;
+    Sys sys = 3;
+    Sysconfig sysconfig = 4;
+}
+
+message Os {
+    map<string, string> environ = 1;
+}
+
+message Site {
+    map<string, Package> packages = 1;
+}
+
+message Sys {
+    bool debug_build = 1;
+    bool dev_mode = 2;
+    bool is_venv = 3;
+    string abiflags = 4;
+    string base_prefix = 5;
+    string default_encoding = 6;
+    string executable = 7;
+    string filesystem_encoding = 8;
+    string implementation_name = 9;
+    string platform = 10;
+    string prefix = 11;
+    repeated string builtin_module_names = 12;
+    repeated string dll_paths = 13;
+    repeated string path = 14;
+    VersionInfo version_info = 15;
+}
+
+message VersionInfo {
+    uint32 major = 1;
+    uint32 minor = 2;
+    uint32 micro = 3;
+    ReleaseLevel releaselevel = 4;
+    uint32 serial = 5;
+}
+
+enum ReleaseLevel {
+    ALPHA = 0;
+    BETA = 1;
+    CANDIDATE = 2;
+    FINAL = 3;
+}
+
+message Sysconfig {
+    string data = 1;
+    string include = 2;
+    string platinclude = 3;
+    string platlib = 4;
+    string platstdlib = 5;
+    string purelib = 6;
+    string scripts = 7;
+    string stdlib = 8;
+}
+
+message Package {
+    string dist_name = 1;
+    string dist_version = 2;
+    optional bool dist_editable = 3;
+    optional string dist_entry_points = 4;
+    optional string dist_location = 5;
+    repeated string dist_requires = 6;
+    optional string dist_requires_python = 7;
+}
+
+// commands
+message GetEnvironmentRequest {}
+
+message GetEnvironmentResponse {
+    Python python = 1;
+}