Add Swagger JSON definitions.

Makefile

@@ -1,4 +1,9 @@
-.PHONY: go
+.PHONY: go swagger
+
+all: go swagger
 
 go:
 	cd go && make
+
+swagger:
+	cd swagger && make

go/go.mod

@@ -1,6 +1,6 @@
 module github.com/brocaar/chirpstack-api/go
 
-go 1.12
+go 1.13
 
 require (
 	github.com/golang/protobuf v1.3.2

swagger/Makefile

@@ -0,0 +1,28 @@
+.PHONY: requirements as-external-api
+
+GRPC_GW_PATH := $(shell go list -f '{{ .Dir }}' github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway)
+GOOGLEAPIS_PATH := "$(GRPC_GW_PATH)/../third_party/googleapis"
+
+all: requirements as-external-api
+
+requirements:
+	@go mod download
+	@go install github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger
+	@go install github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
+
+as-external-api:
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/application.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/common.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/device.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/deviceProfile.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/deviceQueue.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/fuotaDeployment.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/gateway.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/gatewayProfile.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/internal.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/multicastGroup.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/networkServer.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/organization.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/profiles.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/serviceProfile.proto
+	protoc -I=$(GOOGLEAPIS_PATH) -I=../protobuf -I=../protobuf/as/external/api --swagger_out=json_names_for_fields=true:. as/external/api/user.proto