First pass at YP registration/configuration (#209)

* Spike: Ping YP service with instance details

* WIP: Add to the config to support YP

* Add YP response endpoint

* Handle YP errors. Use config. Off by default

* Show message about YP support on launch

* Add animated gif preview when generating thumb

* Increase quality of preview gif and only create it if YP is enabled

* Do not allow re-registration by clearing the key

* Make large and small logos actually structured

* Change log level

* Fix default YP service URL

* Point to default hostname

* Set default value for YP to false

yp/api.go

@@ -0,0 +1,46 @@
+package yp
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/gabek/owncast/config"
+	"github.com/gabek/owncast/utils"
+)
+
+type ypDetailsResponse struct {
+	Name                  string   `json:"name"`
+	Description           string   `json:"description"`
+	Logo                  string   `json:"logo"`
+	NSFW                  bool     `json:"nsfw"`
+	Tags                  []string `json:"tags"`
+	Online                bool     `json:"online"`
+	ViewerCount           int      `json:"viewerCount"`
+	OverallMaxViewerCount int      `json:"overallMaxViewerCount"`
+	SessionMaxViewerCount int      `json:"sessionMaxViewerCount"`
+
+	LastConnectTime utils.NullTime `json:"lastConnectTime"`
+}
+
+//GetYPResponse gets the status of the server for YP purposes
+func GetYPResponse(w http.ResponseWriter, r *http.Request) {
+	status := getStatus()
+
+	response := ypDetailsResponse{
+		Name:                  config.Config.InstanceDetails.Name,
+		Description:           config.Config.InstanceDetails.Summary,
+		Logo:                  config.Config.InstanceDetails.Logo.Large,
+		NSFW:                  config.Config.InstanceDetails.NSFW,
+		Tags:                  config.Config.InstanceDetails.Tags,
+		Online:                status.Online,
+		ViewerCount:           status.ViewerCount,
+		OverallMaxViewerCount: status.OverallMaxViewerCount,
+		SessionMaxViewerCount: status.SessionMaxViewerCount,
+		LastConnectTime:       status.LastConnectTime,
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+
+	json.NewEncoder(w).Encode(response)
+
+}