update Activity struct and add emoji functions (#895)

* update Activity struct and add emoji functions

* fix the emoji regex

* Remove inline type definitions

* Change function name

* fix message_test function name

* make custom unmarshaljson and change `CreatedAt` to `time.Time`

* fix

Co-authored-by: post <61803796+postrequest69@users.noreply.github.com>

message.go

@@ -125,6 +125,24 @@ type Message struct {
 	Flags MessageFlags `json:"flags"`
 }
 
+// GetCustomEmojis pulls out all the custom (Non-unicode) emojis from a message and returns a Slice of the Emoji struct.
+func (m *Message) GetCustomEmojis() []*Emoji {
+	var toReturn []*Emoji
+	emojis := EmojiRegex.FindAllString(m.Content, -1)
+	if len(emojis) < 1 {
+		return toReturn
+	}
+	for _, em := range emojis {
+		parts := strings.Split(em, ":")
+		toReturn = append(toReturn, &Emoji{
+			ID:       parts[2][:len(parts[2])-1],
+			Name:     parts[1],
+			Animated: strings.HasPrefix(em, "<a:"),
+		})
+	}
+	return toReturn
+}
+
 // MessageFlags is the flags of "message" (see MessageFlags* consts)
 // https://discord.com/developers/docs/resources/channel#message-object-message-flags
 type MessageFlags int

message_test.go

@@ -38,3 +38,15 @@ func TestContentWithMoreMentionsReplaced(t *testing.T) {
 		t.Error(result)
 	}
 }
+func TestGettingEmojisFromMessage(t *testing.T) {
+	msg := "test test <:kitty14:811736565172011058> <:kitty4:811736468812595260>"
+	m := &Message{
+		Content: msg,
+	}
+	emojis := m.GetCustomEmojis()
+	if len(emojis) < 1 {
+		t.Error("No emojis found.")
+		return
+	}
+
+}

structs.go

@@ -16,6 +16,7 @@ import (
 	"fmt"
 	"math"
 	"net/http"
+	"regexp"
 	"strings"
 	"sync"
 	"time"
@@ -353,6 +354,11 @@ type Emoji struct {
 	Available     bool     `json:"available"`
 }
 
+// EmojiRegex is the regex used to find and identify emojis in messages
+var (
+	EmojiRegex = regexp.MustCompile(`<(a|):[A-z0-9_~]+:[0-9]{18}>`)
+)
+
 // MessageFormat returns a correctly formatted Emoji for use in Message content and embeds
 func (e *Emoji) MessageFormat() string {
 	if e.ID != "" && e.Name != "" {
@@ -1117,6 +1123,71 @@ type Activity struct {
 	Name          string       `json:"name"`
 	Type          ActivityType `json:"type"`
 	URL           string       `json:"url,omitempty"`
+	CreatedAt     time.Time    `json:"created_at"`
+	ApplicationID string       `json:"application_id,omitempty"`
+	State         string       `json:"state,omitempty"`
+	Details       string       `json:"details,omitempty"`
+	Timestamps    TimeStamps   `json:"timestamps,omitempty"`
+	Emoji         Emoji        `json:"emoji,omitempty"`
+	Party         Party        `json:"party,omitempty"`
+	Assets        Assets       `json:"assets,omitempty"`
+	Secrets       Secrets      `json:"secrets,omitempty"`
+	Instance      bool         `json:"instance,omitempty"`
+	Flags         int          `json:"flags,omitempty"`
+}
+
+// UnmarshalJSON is a custom unmarshaljson to make CreatedAt a time.Time instead of an int
+func (activity *Activity) UnmarshalJSON(b []byte) error {
+	temp := struct {
+		Name          string       `json:"name"`
+		Type          ActivityType `json:"type"`
+		URL           string       `json:"url,omitempty"`
+		CreatedAt     int64        `json:"created_at"`
+		ApplicationID string       `json:"application_id,omitempty"`
+		State         string       `json:"state,omitempty"`
+		Details       string       `json:"details,omitempty"`
+		Timestamps    TimeStamps   `json:"timestamps,omitempty"`
+		Emoji         Emoji        `json:"emoji,omitempty"`
+		Party         Party        `json:"party,omitempty"`
+		Assets        Assets       `json:"assets,omitempty"`
+		Secrets       Secrets      `json:"secrets,omitempty"`
+		Instance      bool         `json:"instance,omitempty"`
+		Flags         int          `json:"flags,omitempty"`
+	}{}
+	err := json.Unmarshal(b, &temp)
+	if err != nil {
+		return err
+	}
+	activity.CreatedAt = time.Unix(0, temp.CreatedAt*1000000)
+	activity.ApplicationID = temp.ApplicationID
+	activity.Assets = temp.Assets
+	activity.Details = temp.Details
+	activity.Emoji = temp.Emoji
+	activity.Flags = temp.Flags
+	activity.Instance = temp.Instance
+	activity.Name = temp.Name
+	activity.Party = temp.Party
+	activity.Secrets = temp.Secrets
+	activity.State = temp.State
+	activity.Timestamps = temp.Timestamps
+	activity.Type = temp.Type
+	activity.URL = temp.URL
+	return nil
+}
+
+// Party defines the Party field in the Activity struct
+// https://discord.com/developers/docs/topics/gateway#activity-object
+type Party struct {
+	ID   string `json:"id,omitempty"`
+	Size []int  `json:"size,omitempty"`
+}
+
+// Secrets defines the Secrets field for the Activity struct
+// https://discord.com/developers/docs/topics/gateway#activity-object
+type Secrets struct {
+	Join     string `json:"join,omitempty"`
+	Spectate string `json:"spectate,omitempty"`
+	Match    string `json:"match,omitempty"`
 }
 
 // ActivityType is the type of Activity (see ActivityType* consts) in the Activity struct