beginning of client

backend/ipc/client.go

@@ -0,0 +1,83 @@
+package ipc
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net"
+	"net/http"
+)
+
+var ErrPingFail = errors.New("ping failed")
+
+type Client struct {
+	httpC http.Client
+}
+
+// Connect attempts to connect to the IPC socket as client.
+func Connect() (*Client, error) {
+	conn, err := Dial()
+	if err != nil {
+		return nil, err
+	}
+	client := &Client{httpC: http.Client{
+		Transport: &http.Transport{
+			DialContext: func(_ context.Context, _, _ string) (net.Conn, error) {
+				return conn, nil
+			},
+		},
+	}}
+	if err := client.Ping(); err != nil {
+		return nil, err
+	}
+	return client, nil
+}
+
+func (c *Client) Ping() error {
+	if c.makeSimpleRequest(http.MethodGet, PingPath) != nil {
+		return ErrPingFail
+	}
+	return nil
+}
+
+func (c *Client) Play() error {
+	return c.makeSimpleRequest(http.MethodPost, PlayPath)
+}
+
+func (c *Client) Pause() error {
+	return c.makeSimpleRequest(http.MethodPost, PausePath)
+}
+
+func (c *Client) PlayPause() error {
+	return c.makeSimpleRequest(http.MethodPost, PlayPausePath)
+}
+
+func (c *Client) SeekNext() error {
+	return c.makeSimpleRequest(http.MethodPost, NextPath)
+}
+
+func (c *Client) SeekBackOrPrevious() error {
+	return c.makeSimpleRequest(http.MethodPost, NextPath)
+}
+
+func (c *Client) makeSimpleRequest(method string, path string) error {
+	var resp *http.Response
+	var err error
+	switch method {
+	case http.MethodGet:
+		resp, err = c.httpC.Get(path)
+	case http.MethodPost:
+		resp, err = c.httpC.Post(path, "application/json", nil)
+	}
+
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		var r Response
+		json.NewDecoder(resp.Body).Decode(&r)
+		return errors.New(r.Error)
+	}
+	return nil
+}