Api/v1/statuses (#11)

This PR adds:
Statuses

    New status creation.
    View existing status
    Delete a status
    Fave a status
    Unfave a status
    See who's faved a status

Media

    Upload media attachment and store/retrieve it
    Upload custom emoji and store/retrieve it

Fileserver

    Serve files from storage

Testing

    Test models, testrig -- run a GTS test instance and play around with it.

internal/apimodule/status/statusunfave.go

@@ -0,0 +1,136 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package status
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/distributor"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+func (m *StatusModule) StatusUnfavePOSTHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func":        "StatusUnfavePOSTHandler",
+		"request_uri": c.Request.RequestURI,
+		"user_agent":  c.Request.UserAgent(),
+		"origin_ip":   c.ClientIP(),
+	})
+	l.Debugf("entering function")
+
+	authed, err := oauth.MustAuth(c, true, false, true, true) // we don't really need an app here but we want everything else
+	if err != nil {
+		l.Debug("not authed so can't unfave status")
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "not authorized"})
+		return
+	}
+
+	targetStatusID := c.Param(IDKey)
+	if targetStatusID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no status id provided"})
+		return
+	}
+
+	l.Tracef("going to search for target status %s", targetStatusID)
+	targetStatus := &gtsmodel.Status{}
+	if err := m.db.GetByID(targetStatusID, targetStatus); err != nil {
+		l.Errorf("error fetching status %s: %s", targetStatusID, err)
+		c.JSON(http.StatusNotFound, gin.H{"error": fmt.Sprintf("status %s not found", targetStatusID)})
+		return
+	}
+
+	l.Tracef("going to search for target account %s", targetStatus.AccountID)
+	targetAccount := &gtsmodel.Account{}
+	if err := m.db.GetByID(targetStatus.AccountID, targetAccount); err != nil {
+		l.Errorf("error fetching target account %s: %s", targetStatus.AccountID, err)
+		c.JSON(http.StatusNotFound, gin.H{"error": fmt.Sprintf("status %s not found", targetStatusID)})
+		return
+	}
+
+	l.Trace("going to get relevant accounts")
+	relevantAccounts, err := m.db.PullRelevantAccountsFromStatus(targetStatus)
+	if err != nil {
+		l.Errorf("error fetching related accounts for status %s: %s", targetStatusID, err)
+		c.JSON(http.StatusNotFound, gin.H{"error": fmt.Sprintf("status %s not found", targetStatusID)})
+		return
+	}
+
+	l.Trace("going to see if status is visible")
+	visible, err := m.db.StatusVisible(targetStatus, targetAccount, authed.Account, relevantAccounts) // requestingAccount might well be nil here, but StatusVisible knows how to take care of that
+	if err != nil {
+		l.Errorf("error seeing if status %s is visible: %s", targetStatus.ID, err)
+		c.JSON(http.StatusNotFound, gin.H{"error": fmt.Sprintf("status %s not found", targetStatusID)})
+		return
+	}
+
+	if !visible {
+		l.Trace("status is not visible")
+		c.JSON(http.StatusNotFound, gin.H{"error": fmt.Sprintf("status %s not found", targetStatusID)})
+		return
+	}
+
+	// is the status faveable?
+	if !targetStatus.VisibilityAdvanced.Likeable {
+		l.Debug("status is not faveable")
+		c.JSON(http.StatusForbidden, gin.H{"error": fmt.Sprintf("status %s not faveable so therefore not unfave-able", targetStatusID)})
+		return
+	}
+
+	// it's visible! it's faveable! so let's unfave the FUCK out of it
+	fave, err := m.db.UnfaveStatus(targetStatus, authed.Account.ID)
+	if err != nil {
+		l.Debugf("error unfaveing status: %s", err)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	var boostOfStatus *gtsmodel.Status
+	if targetStatus.BoostOfID != "" {
+		boostOfStatus = &gtsmodel.Status{}
+		if err := m.db.GetByID(targetStatus.BoostOfID, boostOfStatus); err != nil {
+			l.Errorf("error fetching boosted status %s: %s", targetStatus.BoostOfID, err)
+			c.JSON(http.StatusNotFound, gin.H{"error": fmt.Sprintf("status %s not found", targetStatusID)})
+			return
+		}
+	}
+
+	mastoStatus, err := m.mastoConverter.StatusToMasto(targetStatus, targetAccount, authed.Account, relevantAccounts.BoostedAccount, relevantAccounts.ReplyToAccount, boostOfStatus)
+	if err != nil {
+		l.Errorf("error converting status %s to frontend representation: %s", targetStatus.ID, err)
+		c.JSON(http.StatusNotFound, gin.H{"error": fmt.Sprintf("status %s not found", targetStatusID)})
+		return
+	}
+
+	// fave might be nil if this status wasn't faved in the first place
+	// we only want to pass the message to the distributor if something actually changed
+	if fave != nil {
+		fave.FavedStatus = targetStatus // attach the status pointer to the fave for easy retrieval in the distributor
+		m.distributor.FromClientAPI() <- distributor.FromClientAPI{
+			APObjectType:   gtsmodel.ActivityStreamsNote, // status is a note
+			APActivityType: gtsmodel.ActivityStreamsUndo, // undo the fave
+			Activity:       fave,                         // pass the undone fave along
+		}
+	}
+
+	c.JSON(http.StatusOK, mastoStatus)
+}