library: rpc: activity data types and set method

Activity data types come from Discord documentation examples as the documented field optionality is inaccurate.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

activity.go

@@ -0,0 +1,84 @@
+package rpcfetch
+
+import (
+	"os"
+
+	"github.com/google/uuid"
+)
+
+type Activity struct {
+	// State is the user's current party status, or text used for a custom status
+	State string `json:"state,omitempty"`
+	// Details is what the player is currently doing
+	Details string `json:"details,omitempty"`
+	// Timestamps are Unix timestamps for start and/or end of the game
+	Timestamps *ActivityTimestamps `json:"timestamps,omitempty"`
+	// Assets are images for the presence and their hover texts
+	Assets *ActivityAssets `json:"assets,omitempty"`
+	// Party is information for the current party of the player
+	Party *ActivityParty `json:"party,omitempty"`
+	// Secrets for Rich Presence joining and spectating
+	Secrets *ActivitySecrets `json:"secrets,omitempty"`
+	// Instance is whether or not the activity is an instanced game session
+	Instance bool `json:"instance,omitempty"`
+}
+
+type ActivityTimestamps struct {
+	// Start is the Unix time (in milliseconds) of when the activity started
+	Start *int64 `json:"start,omitempty"`
+	// End is the Unix time (in milliseconds) of when the activity ends
+	End *int64 `json:"end,omitempty"`
+}
+
+type ActivityAssets struct {
+	// LargeImage is the large image asset
+	LargeImage string `json:"large_image,omitempty"`
+	// LargeText is the text displayed when hovering over the large image of the activity
+	LargeText string `json:"large_text,omitempty"`
+	// SmallImage is the small image asset
+	SmallImage string `json:"small_image,omitempty"`
+	// SmallText is the text displayed when hovering over the small image of the activity
+	SmallText string `json:"small_text,omitempty"`
+}
+
+type ActivityParty struct {
+	// ID of the party
+	ID string `json:"id,omitempty"`
+	// Size is used to show the party's current and maximum size
+	Size *[2]int `json:"size,omitempty"`
+}
+
+type ActivitySecrets struct {
+	// Join is the secret for joining a party
+	Join string `json:"join,omitempty"`
+	// Spectate is the secret for spectating a game
+	Spectate string `json:"spectate,omitempty"`
+	// Match is the secret for a specific instanced match
+	Match string `json:"match,omitempty"`
+}
+
+type activityArgs struct {
+	PID      int       `json:"pid"`
+	Activity *Activity `json:"activity"`
+}
+
+func (d *Client) SetActivity(act *Activity) error {
+	if err := d.activate(); err != nil {
+		return err
+	}
+
+	nonce := uuid.New().String()
+
+	_, _, err := validateRaw[Response[[]byte]](Heartbeat, "", "SET_ACTIVITY", nonce)(
+		d, Heartbeat, Command[activityArgs]{
+			Arguments: activityArgs{
+				PID:      os.Getpid(),
+				Activity: act,
+			},
+			payload: payload{
+				Command: "SET_ACTIVITY",
+				Nonce:   nonce,
+			},
+		})
+	return err
+}

go.mod

@@ -2,4 +2,4 @@ module git.ophivana.moe/cat/rpcfetch
 
 go 1.22
 
-require github.com/google/uuid v1.6.0 // indirect
+require github.com/google/uuid v1.6.0