Adds support HomeKit cameras!

pkg/homekit/character.go

@@ -0,0 +1,133 @@
+package homekit
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"github.com/brutella/hap/characteristic"
+	"github.com/brutella/hap/tlv8"
+	"io"
+	"net/http"
+)
+
+type Character struct {
+	AID         int         `json:"aid,omitempty"`
+	IID         int         `json:"iid"`
+	Type        string      `json:"type,omitempty"`
+	Format      string      `json:"format,omitempty"`
+	Value       interface{} `json:"value,omitempty"`
+	Event       interface{} `json:"ev,omitempty"`
+	Perms       []string    `json:"perms,omitempty"`
+	Description string      `json:"description,omitempty"`
+	//MaxDataLen int      `json:"maxDataLen"`
+
+	listeners map[io.Writer]bool
+}
+
+func (c *Character) AddListener(w io.Writer) {
+	// TODO: sync.Mutex
+	if c.listeners == nil {
+		c.listeners = map[io.Writer]bool{}
+	}
+	c.listeners[w] = true
+}
+
+func (c *Character) RemoveListener(w io.Writer) {
+	delete(c.listeners, w)
+
+	if len(c.listeners) == 0 {
+		c.listeners = nil
+	}
+}
+
+func (c *Character) NotifyListeners(ignore io.Writer) error {
+	if c.listeners == nil {
+		return nil
+	}
+
+	data, err := c.GenerateEvent()
+	if err != nil {
+		return err
+	}
+
+	for w, _ := range c.listeners {
+		if w == ignore {
+			continue
+		}
+		if _, err = w.Write(data); err != nil {
+			// error not a problem - just remove listener
+			c.RemoveListener(w)
+		}
+	}
+
+	return nil
+}
+
+// GenerateEvent with raw HTTP headers
+func (c *Character) GenerateEvent() (data []byte, err error) {
+	chars := Characters{
+		Characters: []*Character{{AID: DeviceAID, IID: c.IID, Value: c.Value}},
+	}
+	if data, err = json.Marshal(chars); err != nil {
+		return
+	}
+
+	res := http.Response{
+		StatusCode:    http.StatusOK,
+		ProtoMajor:    1,
+		ProtoMinor:    0,
+		Header:        http.Header{"Content-Type": []string{MimeJSON}},
+		ContentLength: int64(len(data)),
+		Body:          io.NopCloser(bytes.NewReader(data)),
+	}
+
+	buf := bytes.NewBuffer([]byte{0})
+	if err = res.Write(buf); err != nil {
+		return
+	}
+	copy(buf.Bytes(), "EVENT")
+
+	return buf.Bytes(), err
+}
+
+// Set new value and NotifyListeners
+func (c *Character) Set(v interface{}) (err error) {
+	if err = c.Write(v); err != nil {
+		return
+	}
+	return c.NotifyListeners(nil)
+}
+
+// Write new value with right format
+func (c *Character) Write(v interface{}) (err error) {
+	switch c.Format {
+	case characteristic.FormatTLV8:
+		var data []byte
+		if data, err = tlv8.Marshal(v); err != nil {
+			return
+		}
+		c.Value = base64.StdEncoding.EncodeToString(data)
+
+	case characteristic.FormatBool:
+		switch v.(type) {
+		case bool:
+			c.Value = v.(bool)
+		case float64:
+			c.Value = v.(float64) != 0
+		}
+	}
+	return
+}
+
+// ReadTLV8 value to right struct
+func (c *Character) ReadTLV8(v interface{}) (err error) {
+	var data []byte
+	if data, err = base64.StdEncoding.DecodeString(c.Value.(string)); err != nil {
+		return
+	}
+	return tlv8.Unmarshal(data, v)
+}
+
+func (c *Character) ReadBool() bool {
+	return c.Value.(bool)
+}