Follows and relationships (#27)

* Follows -- create and undo, both remote and local
* Statuses -- federate new posts, including media, attachments, CWs and image descriptions.

internal/api/client/account/account.go

@@ -57,6 +57,14 @@ const (
 	GetStatusesPath = BasePathWithID + "/statuses"
 	// GetFollowersPath is for showing an account's followers
 	GetFollowersPath = BasePathWithID + "/followers"
+	// GetFollowingPath is for showing account's that an account follows.
+	GetFollowingPath = BasePathWithID + "/following"
+	// GetRelationshipsPath is for showing an account's relationship with other accounts
+	GetRelationshipsPath = BasePath + "/relationships"
+	// FollowPath is for POSTing new follows to, and updating existing follows
+	PostFollowPath = BasePathWithID + "/follow"
+	// PostUnfollowPath is for POSTing an unfollow
+	PostUnfollowPath = BasePathWithID + "/unfollow"
 )
 
 // Module implements the ClientAPIModule interface for account-related actions
@@ -82,6 +90,10 @@ func (m *Module) Route(r router.Router) error {
 	r.AttachHandler(http.MethodPatch, BasePathWithID, m.muxHandler)
 	r.AttachHandler(http.MethodGet, GetStatusesPath, m.AccountStatusesGETHandler)
 	r.AttachHandler(http.MethodGet, GetFollowersPath, m.AccountFollowersGETHandler)
+	r.AttachHandler(http.MethodGet, GetFollowingPath, m.AccountFollowingGETHandler)
+	r.AttachHandler(http.MethodGet, GetRelationshipsPath, m.AccountRelationshipsGETHandler)
+	r.AttachHandler(http.MethodPost, PostFollowPath, m.AccountFollowPOSTHandler)
+	r.AttachHandler(http.MethodPost, PostUnfollowPath, m.AccountUnfollowPOSTHandler)
 	return nil
 }
 

internal/api/client/account/follow.go

@@ -0,0 +1,56 @@
+/*
+   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 account
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// AccountFollowPOSTHandler is the endpoint for creating a new follow request to the target account
+func (m *Module) AccountFollowPOSTHandler(c *gin.Context) {
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		return
+	}
+
+	targetAcctID := c.Param(IDKey)
+	if targetAcctID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no account id specified"})
+		return
+	}
+	form := &model.AccountFollowRequest{}
+	if err := c.ShouldBind(form); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	form.TargetAccountID = targetAcctID
+
+	relationship, errWithCode := m.processor.AccountFollowCreate(authed, form)
+	if errWithCode != nil {
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	c.JSON(http.StatusOK, relationship)
+}

internal/api/client/account/following.go

@@ -0,0 +1,49 @@
+/*
+   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 account
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// AccountFollowersGETHandler serves the followers of the requested account, if they're visible to the requester.
+func (m *Module) AccountFollowingGETHandler(c *gin.Context) {
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		return
+	}
+
+	targetAcctID := c.Param(IDKey)
+	if targetAcctID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no account id specified"})
+		return
+	}
+
+	following, errWithCode := m.processor.AccountFollowingGet(authed, targetAcctID)
+	if errWithCode != nil {
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	c.JSON(http.StatusOK, following)
+}

internal/api/client/account/relationships.go

@@ -0,0 +1,46 @@
+package account
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// AccountRelationshipsGETHandler serves the relationship of the requesting account with one or more requested account IDs.
+func (m *Module) AccountRelationshipsGETHandler(c *gin.Context) {
+	l := m.log.WithField("func", "AccountRelationshipsGETHandler")
+
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debugf("error authing: %s", err)
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		return
+	}
+
+	targetAccountIDs := c.QueryArray("id[]")
+	if len(targetAccountIDs) == 0 {
+		// check fallback -- let's be generous and see if maybe it's just set as 'id'?
+		id := c.Query("id")
+		if id == "" {
+			l.Debug("no account id specified in query")
+			c.JSON(http.StatusBadRequest, gin.H{"error": "no account id specified"})
+			return
+		}
+		targetAccountIDs = append(targetAccountIDs, id)
+	}
+
+	relationships := []model.Relationship{}
+
+	for _, targetAccountID := range targetAccountIDs {
+		r, errWithCode := m.processor.AccountRelationshipGet(authed, targetAccountID)
+		if err != nil {
+			c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+			return
+		}
+		relationships = append(relationships, *r)
+	}
+
+	c.JSON(http.StatusOK, relationships)
+}

internal/api/client/account/unfollow.go

@@ -0,0 +1,53 @@
+/*
+   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 account
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// AccountUnfollowPOSTHandler is the endpoint for removing a follow and/or follow request to the target account
+func (m *Module) AccountUnfollowPOSTHandler(c *gin.Context) {
+	l := m.log.WithField("func", "AccountUnfollowPOSTHandler")
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debug(err)
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		return
+	}
+
+	targetAcctID := c.Param(IDKey)
+	if targetAcctID == "" {
+		l.Debug(err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no account id specified"})
+		return
+	}
+
+	relationship, errWithCode := m.processor.AccountFollowRemove(authed, targetAcctID)
+	if errWithCode != nil {
+		l.Debug(errWithCode.Error())
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	c.JSON(http.StatusOK, relationship)
+}