From 8bd1c5a89b0da1c045ff1b30cb69f7388bce41ed Mon Sep 17 00:00:00 2001
From: Kegan Dougal <kegan@matrix.org>
Date: Fri, 2 Dec 2016 15:36:09 +0000
Subject: [PATCH] Add Client.StateEvent method with test and example. Move
 examples to different file

---
 client.go               |  9 ++++++++
 client_examples_test.go | 39 +++++++++++++++++++++++++++++++
 client_test.go          | 51 +++++++++++++++++++++--------------------
 3 files changed, 74 insertions(+), 25 deletions(-)
 create mode 100644 client_examples_test.go

diff --git a/client.go b/client.go
index d60cadf..2ada98e 100644
--- a/client.go
+++ b/client.go
@@ -303,6 +303,15 @@ func (cli *Client) LeaveRoom(roomID string) (resp *RespLeaveRoom, err error) {
 	return
 }
 
+// StateEvent gets a single state event in a room. It will attempt to JSON unmarshal into the given "outContent" struct with
+// the HTTP response body, or return an error.
+// See http://matrix.org/docs/spec/client_server/r0.2.0.html#get-matrix-client-r0-rooms-roomid-state-eventtype-statekey
+func (cli *Client) StateEvent(roomID, eventType, stateKey string, outContent interface{}) (err error) {
+	u := cli.BuildURL("rooms", roomID, "state", eventType, stateKey)
+	_, err = cli.MakeRequest("GET", u, nil, outContent)
+	return
+}
+
 // UploadLink uploads an HTTP URL and then returns an MXC URI.
 func (cli *Client) UploadLink(link string) (*RespMediaUpload, error) {
 	res, err := cli.Client.Get(link)
diff --git a/client_examples_test.go b/client_examples_test.go
new file mode 100644
index 0000000..0d98022
--- /dev/null
+++ b/client_examples_test.go
@@ -0,0 +1,39 @@
+package gomatrix
+
+import "fmt"
+
+func ExampleClient_BuildURLWithQuery() {
+	cli, _ := NewClient("https://matrix.org", "@example:matrix.org", "abcdef123456")
+	out := cli.BuildURLWithQuery([]string{"sync"}, map[string]string{
+		"filter_id": "5",
+	})
+	fmt.Println(out)
+	// Output: https://matrix.org/_matrix/client/r0/sync?access_token=abcdef123456&filter_id=5
+}
+
+func ExampleClient_BuildURL() {
+	userID := "@example:matrix.org"
+	cli, _ := NewClient("https://matrix.org", userID, "abcdef123456")
+	out := cli.BuildURL("user", userID, "filter")
+	fmt.Println(out)
+	// Output: https://matrix.org/_matrix/client/r0/user/@example:matrix.org/filter?access_token=abcdef123456
+}
+
+func ExampleClient_BuildBaseURL() {
+	userID := "@example:matrix.org"
+	cli, _ := NewClient("https://matrix.org", userID, "abcdef123456")
+	out := cli.BuildBaseURL("_matrix", "client", "r0", "directory", "room", "#matrix:matrix.org")
+	fmt.Println(out)
+	// Output: https://matrix.org/_matrix/client/r0/directory/room/%23matrix:matrix.org?access_token=abcdef123456
+}
+
+// Compiled, not run.
+func ExampleClient_StateEvent() {
+	content := struct {
+		name string `json:"name"`
+	}{}
+	cli, _ := NewClient("https://matrix.org", "@example:matrix.org", "abcdef123456")
+	if err := cli.StateEvent("!foo:bar", "m.room.name", "", &content); err != nil {
+		panic(err)
+	}
+}
diff --git a/client_test.go b/client_test.go
index 081dc12..93bd896 100644
--- a/client_test.go
+++ b/client_test.go
@@ -8,31 +8,6 @@ import (
 	"testing"
 )
 
-func ExampleClient_BuildURLWithQuery() {
-	cli, _ := NewClient("https://matrix.org", "@example:matrix.org", "abcdef123456")
-	out := cli.BuildURLWithQuery([]string{"sync"}, map[string]string{
-		"filter_id": "5",
-	})
-	fmt.Println(out)
-	// Output: https://matrix.org/_matrix/client/r0/sync?access_token=abcdef123456&filter_id=5
-}
-
-func ExampleClient_BuildURL() {
-	userID := "@example:matrix.org"
-	cli, _ := NewClient("https://matrix.org", userID, "abcdef123456")
-	out := cli.BuildURL("user", userID, "filter")
-	fmt.Println(out)
-	// Output: https://matrix.org/_matrix/client/r0/user/@example:matrix.org/filter?access_token=abcdef123456
-}
-
-func ExampleClient_BuildBaseURL() {
-	userID := "@example:matrix.org"
-	cli, _ := NewClient("https://matrix.org", userID, "abcdef123456")
-	out := cli.BuildBaseURL("_matrix", "client", "r0", "directory", "room", "#matrix:matrix.org")
-	fmt.Println(out)
-	// Output: https://matrix.org/_matrix/client/r0/directory/room/%23matrix:matrix.org?access_token=abcdef123456
-}
-
 func TestClient_LeaveRoom(t *testing.T) {
 	cli := mockClient(func(req *http.Request) (*http.Response, error) {
 		if req.Method == "POST" && req.URL.Path == "/_matrix/client/r0/rooms/!foo:bar/leave" {
@@ -49,6 +24,32 @@ func TestClient_LeaveRoom(t *testing.T) {
 	}
 }
 
+func TestClient_StateEvent(t *testing.T) {
+	cli := mockClient(func(req *http.Request) (*http.Response, error) {
+		if req.Method == "GET" && req.URL.Path == "/_matrix/client/r0/rooms/!foo:bar/state/m.room.name" {
+			return &http.Response{
+				StatusCode: 200,
+				Body:       ioutil.NopCloser(bytes.NewBufferString(`{"name":"Room Name Goes Here"}`)),
+			}, nil
+		}
+		return nil, fmt.Errorf("unhandled URL: %s", req.URL.Path)
+	})
+
+	content := struct {
+		Name string `json:"name"`
+	}{}
+	expectContent := struct {
+		Name string `json:"name"`
+	}{"Room Name Goes Here"}
+
+	if err := cli.StateEvent("!foo:bar", "m.room.name", "", &content); err != nil {
+		t.Fatalf("StateEvent: error, got %s", err.Error())
+	}
+	if content.Name != expectContent.Name {
+		t.Fatalf("StateEvent: got %s, want %s", content.Name, expectContent.Name)
+	}
+}
+
 func mockClient(fn func(*http.Request) (*http.Response, error)) *Client {
 	mrt := MockRoundTripper{
 		RT: fn,