feat: add OpenIn option to coder_app (#15743)

This PR is the coder/coder part of [the open_in parameter
issue](https://github.com/coder/terraform-provider-coder/issues/297)
aiming to add a new optional parameter to choose how to open modules.

This PR is heavily linked [to this
PR](https://github.com/coder/terraform-provider-coder/pull/321).

ℹ️ For now, some integrations tests can not be pushed as it requires a
release on the terraform-provider repo.

provisioner/terraform/resources.go

@@ -84,6 +84,7 @@ type agentAppAttributes struct {
 	Healthcheck []appHealthcheckAttributes `mapstructure:"healthcheck"`
 	Order       int64                      `mapstructure:"order"`
 	Hidden      bool                       `mapstructure:"hidden"`
+	OpenIn      string                     `mapstructure:"open_in"`
 }
 
 type agentEnvAttributes struct {
@@ -432,6 +433,16 @@ func ConvertState(ctx context.Context, modules []*tfjson.StateModule, rawGraph s
 				sharingLevel = proto.AppSharingLevel_PUBLIC
 			}
 
+			openIn := proto.AppOpenIn_SLIM_WINDOW
+			switch strings.ToLower(attrs.OpenIn) {
+			case "slim-window":
+				openIn = proto.AppOpenIn_SLIM_WINDOW
+			case "window":
+				openIn = proto.AppOpenIn_WINDOW
+			case "tab":
+				openIn = proto.AppOpenIn_TAB
+			}
+
 			for _, agents := range resourceAgents {
 				for _, agent := range agents {
 					// Find agents with the matching ID and associate them!
@@ -452,6 +463,7 @@ func ConvertState(ctx context.Context, modules []*tfjson.StateModule, rawGraph s
 						Healthcheck:  healthcheck,
 						Order:        attrs.Order,
 						Hidden:       attrs.Hidden,
+						OpenIn:       openIn,
 					})
 				}
 			}

provisioner/terraform/resources_test.go

@@ -182,6 +182,7 @@ func TestConvertResources(t *testing.T) {
 							DisplayName: "app1",
 							// Subdomain defaults to false if unspecified.
 							Subdomain: false,
+							OpenIn:    proto.AppOpenIn_SLIM_WINDOW,
 						},
 						{
 							Slug:        "app2",
@@ -192,11 +193,13 @@ func TestConvertResources(t *testing.T) {
 								Interval:  5,
 								Threshold: 6,
 							},
+							OpenIn: proto.AppOpenIn_SLIM_WINDOW,
 						},
 						{
 							Slug:        "app3",
 							DisplayName: "app3",
 							Subdomain:   false,
+							OpenIn:      proto.AppOpenIn_SLIM_WINDOW,
 						},
 					},
 					Auth:                     &proto.Agent_Token{},
@@ -217,10 +220,12 @@ func TestConvertResources(t *testing.T) {
 						{
 							Slug:        "app1",
 							DisplayName: "app1",
+							OpenIn:      proto.AppOpenIn_SLIM_WINDOW,
 						},
 						{
 							Slug:        "app2",
 							DisplayName: "app2",
+							OpenIn:      proto.AppOpenIn_SLIM_WINDOW,
 						},
 					},
 					Auth:                     &proto.Agent_Token{},
@@ -243,6 +248,7 @@ func TestConvertResources(t *testing.T) {
 							DisplayName: "app1",
 							// Subdomain defaults to false if unspecified.
 							Subdomain: false,
+							OpenIn:    proto.AppOpenIn_SLIM_WINDOW,
 						},
 						{
 							Slug:        "app2",
@@ -253,6 +259,7 @@ func TestConvertResources(t *testing.T) {
 								Interval:  5,
 								Threshold: 6,
 							},
+							OpenIn: proto.AppOpenIn_SLIM_WINDOW,
 						},
 					},
 					Auth:                     &proto.Agent_Token{},
@@ -271,6 +278,7 @@ func TestConvertResources(t *testing.T) {
 							Slug:        "app3",
 							DisplayName: "app3",
 							Subdomain:   false,
+							OpenIn:      proto.AppOpenIn_SLIM_WINDOW,
 						},
 					},
 					Auth:                     &proto.Agent_Token{},
@@ -454,6 +462,7 @@ func TestConvertResources(t *testing.T) {
 								Slug:        "code-server",
 								DisplayName: "code-server",
 								Url:         "http://localhost:13337?folder=/home/coder",
+								OpenIn:      proto.AppOpenIn_SLIM_WINDOW,
 							},
 						},
 						Auth:                     &proto.Agent_Token{},