Instance settings updates (#59)

Allow admins to set instance settings through a PATCH to /api/v1/instance

Update templates to reflect some of the new fields

internal/api/client/instance/instance.go

@@ -34,5 +34,6 @@ func New(config *config.Config, processor processing.Processor, log *logrus.Logg
 // Route satisfies the ClientModule interface
 func (m *Module) Route(s router.Router) error {
 	s.AttachHandler(http.MethodGet, InstanceInformationPath, m.InstanceInformationGETHandler)
+	s.AttachHandler(http.MethodPatch, InstanceInformationPath, m.InstanceUpdatePATCHHandler)
 	return nil
 }

internal/api/client/instance/instancepatch.go

@@ -0,0 +1,50 @@
+package instance
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+func (m *Module) InstanceUpdatePATCHHandler(c *gin.Context) {
+	l := m.log.WithField("func", "InstanceUpdatePATCHHandler")
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debugf("couldn't auth: %s", err)
+		c.JSON(http.StatusUnauthorized, gin.H{"error": err.Error()})
+		return
+	}
+
+	// only admins can update instance settings
+	if !authed.User.Admin {
+		l.Debug("user is not an admin so cannot update instance settings")
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "not an admin"})
+		return
+	}
+
+	l.Debugf("parsing request form %s", c.Request.Form)
+	form := &model.InstanceSettingsUpdateRequest{}
+	if err := c.ShouldBind(&form); err != nil || form == nil {
+		l.Debugf("could not parse form from request: %s", err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	// if everything on the form is nil, then nothing has been set and we shouldn't continue
+	if form.SiteTitle == nil && form.SiteContactUsername == nil && form.SiteContactEmail == nil && form.SiteShortDescription == nil && form.SiteDescription == nil && form.SiteTerms == nil && form.Avatar == nil && form.Header == nil {
+		l.Debugf("could not parse form from request")
+		c.JSON(http.StatusBadRequest, gin.H{"error": "empty form submitted"})
+		return
+	}
+
+	i, errWithCode := m.processor.InstancePatch(form)
+	if errWithCode != nil {
+		l.Debugf("error with instance patch request: %s", errWithCode.Error())
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	c.JSON(http.StatusOK, i)
+}