[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/client/account/unblock.go

@@ -19,10 +19,12 @@
 package account
 
 import (
+	"errors"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/superseriousbusiness/gotosocial/internal/api"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 )
 
@@ -54,33 +56,38 @@ import (
 //     description: Your relationship to this account.
 //     schema:
 //       "$ref": "#/definitions/accountRelationship"
-//   '401':
-//      description: unauthorized
 //   '400':
 //      description: bad request
+//   '401':
+//      description: unauthorized
 //   '404':
 //      description: not found
+//   '406':
+//      description: not acceptable
+//   '500':
+//      description: internal server error
 func (m *Module) AccountUnblockPOSTHandler(c *gin.Context) {
 	authed, err := oauth.Authed(c, true, true, true, true)
 	if err != nil {
-		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		api.ErrorHandler(c, gtserror.NewErrorUnauthorized(err, err.Error()), m.processor.InstanceGet)
 		return
 	}
 
 	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
 	}
 
 	targetAcctID := c.Param(IDKey)
 	if targetAcctID == "" {
-		c.JSON(http.StatusBadRequest, gin.H{"error": "no account id specified"})
+		err := errors.New("no account id specified")
+		api.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
 		return
 	}
 
 	relationship, errWithCode := m.processor.AccountBlockRemove(c.Request.Context(), authed, targetAcctID)
 	if errWithCode != nil {
-		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		api.ErrorHandler(c, errWithCode, m.processor.InstanceGet)
 		return
 	}