[feature] More consistent API error handling (#637)

* update templates

* start reworking api error handling

* update template

* return AP status at web endpoint if negotiated

* start making api error handling much more consistent

* update account endpoints to new error handling

* use new api error handling in admin endpoints

* go fmt ./...

* use api error logic in app

* use generic error handling in auth

* don't export generic error handler

* don't defer clearing session

* user nicer error handling on oidc callback handler

* tidy up the sign in handler

* tidy up the token handler

* use nicer error handling in blocksget

* auth emojis endpoint

* fix up remaining api endpoints

* fix whoopsie during login flow

* regenerate swagger docs

* change http error logging to debug

internal/api/s2s/nodeinfo/nodeinfoget.go

@@ -23,8 +23,8 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/sirupsen/logrus"
 	"github.com/superseriousbusiness/gotosocial/internal/api"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 )
 
 // NodeInfoGETHandler swagger:operation GET /nodeinfo/2.0 nodeInfoGet
@@ -45,27 +45,22 @@ import (
 //     schema:
 //       "$ref": "#/definitions/nodeinfo"
 func (m *Module) NodeInfoGETHandler(c *gin.Context) {
-	l := logrus.WithFields(logrus.Fields{
-		"func":       "NodeInfoGETHandler",
-		"user-agent": c.Request.UserAgent(),
-	})
-
 	if _, err := api.NegotiateAccept(c, api.JSONAcceptHeaders...); err != nil {
-		c.JSON(http.StatusNotAcceptable, gin.H{"error": err.Error()})
+		api.ErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), m.processor.InstanceGet)
 		return
 	}
 
-	ni, err := m.processor.GetNodeInfo(c.Request.Context(), c.Request)
+	ni, errWithCode := m.processor.GetNodeInfo(c.Request.Context(), c.Request)
+	if errWithCode != nil {
+		api.ErrorHandler(c, errWithCode, m.processor.InstanceGet)
+		return
+	}
+
+	b, err := json.Marshal(ni)
 	if err != nil {
-		l.Debugf("error with get node info request: %s", err)
-		c.JSON(err.Code(), err.Safe())
+		api.ErrorHandler(c, gtserror.NewErrorInternalError(err), m.processor.InstanceGet)
 		return
 	}
 
-	b, jsonErr := json.Marshal(ni)
-	if jsonErr != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": jsonErr.Error()})
-	}
-
 	c.Data(http.StatusOK, `application/json; profile="http://nodeinfo.diaspora.software/ns/schema/2.0#"`, b)
 }