TDR-3364 - Create API Gateway resource

terraform/root_locals.tf

@@ -11,7 +11,8 @@ locals {
       "Role"            = "prvt"
     }
   )
-  dynamodb_hash_key                 = "v1"
-  reference_generator_function_name = "${var.project}-reference-generator-${local.hosting_environment}"
-  reference_counter_table_name      = "${var.project}-reference-counter"
+  dynamodb_hash_key                    = "v1"
+  reference_generator_function_name    = "${var.project}-reference-generator-${local.hosting_environment}"
+  reference_generator_api_gateway_name = "${upper(var.project)}ReferenceGenerator${local.hosting_environment}"
+  reference_counter_table_name         = "${var.project}-reference-counter"
 }

terraform/root_main.tf

@@ -48,4 +48,19 @@ module "reference_generator_lambda" {
   timeout_seconds = 60
   memory_size     = 1024
   tags            = local.hosting_common_tags
+  lambda_invoke_permissions = {
+    "apigateway.amazonaws.com" = "${module.reference_generator_api_gateway.api_execution_arn}/*/GET/counter"
+  }
+}
+
+module "reference_generator_api_gateway" {
+  source = "./da-terraform-modules/apigateway"
+  api_definition = templatefile("./templates/api_gateway/reference_generator.json.tpl", {
+    environment = local.hosting_environment
+    title       = local.reference_generator_api_gateway_name
+    lambda_arn  = module.reference_generator_lambda.lambda_arn,
+  })
+  api_name    = local.reference_generator_api_gateway_name
+  environment = local.hosting_environment
+  common_tags = local.hosting_common_tags
 }

terraform/templates/api_gateway/reference_generator.json.tpl

@@ -0,0 +1,56 @@
+{
+  "swagger" : "2.0",
+  "info" : {
+    "description" : "API Gateway for Reference Generator",
+    "version" : "2023-09-11T11:10:51Z",
+    "title" : "${title}"
+  },
+  "basePath" : "/${environment}",
+  "schemes" : [ "https" ],
+  "paths" : {
+    "/counter" : {
+      "get" : {
+        "produces" : [ "application/json" ],
+        "parameters" : [ {
+          "name" : "numberofrefs",
+          "in" : "query",
+          "required" : true,
+          "type" : "string"
+        } ],
+        "responses" : {
+          "200" : {
+            "description" : "200 response",
+            "schema" : {
+              "$ref" : "#/definitions/Empty"
+            }
+          }
+        },
+        "x-amazon-apigateway-request-validator" : "Validate query string parameters and headers",
+        "x-amazon-apigateway-integration" : {
+          "type" : "aws_proxy",
+          "httpMethod" : "POST",
+          "uri" : "arn:aws:apigateway:eu-west-2:lambda:path/2015-03-31/functions/${lambda_arn}/invocations",
+          "responses" : {
+            "default" : {
+              "statusCode" : "200"
+            }
+          },
+          "passthroughBehavior" : "when_no_match",
+          "contentHandling" : "CONVERT_TO_TEXT"
+        }
+      }
+    }
+  },
+  "definitions" : {
+    "Empty" : {
+      "type" : "object",
+      "title" : "Empty Schema"
+    }
+  },
+  "x-amazon-apigateway-request-validators" : {
+    "Validate query string parameters and headers" : {
+      "validateRequestParameters" : true,
+      "validateRequestBody" : false
+    }
+  }
+}