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package main
import (
"database/sql"
"encoding/json"
"net/http"
_ "github.com/lib/pq"
)
func GetActorFollowing(w http.ResponseWriter, db *sql.DB, id string) {
var following Collection
following.AtContext.Context = "https://www.w3.org/ns/activitystreams"
following.Type = "Collection"
following.TotalItems, _ = GetActorFollowTotal(db, id)
following.Items = GetActorFollowingDB(db, id)
enc, _ := json.MarshalIndent(following, "", "\t")
w.Header().Set("Content-Type", activitystreams)
w.Write(enc)
}
func GetActorFollowers(w http.ResponseWriter, db *sql.DB, id string) {
var following Collection
following.AtContext.Context = "https://www.w3.org/ns/activitystreams"
following.Type = "Collection"
_, following.TotalItems = GetActorFollowTotal(db, id)
following.Items = GetActorFollowDB(db, id)
enc, _ := json.MarshalIndent(following, "", "\t")
w.Header().Set("Content-Type", activitystreams)
w.Write(enc)
}
func GetActorFollowingDB(db *sql.DB, id string) []ObjectBase {
var followingCollection []ObjectBase
query := `select following from following where id=$1`
rows, err := db.Query(query, id)
CheckError(err, "error with following db query")
defer rows.Close()
for rows.Next() {
var obj ObjectBase
err := rows.Scan(&obj.Id)
CheckError(err, "error with following db scan")
followingCollection = append(followingCollection, obj)
}
return followingCollection
}
func GetActorFollowDB(db *sql.DB, id string) []ObjectBase {
var followerCollection []ObjectBase
query := `select follower from follower where id=$1`
rows, err := db.Query(query, id)
CheckError(err, "error with follower db query")
defer rows.Close()
for rows.Next() {
var obj ObjectBase
err := rows.Scan(&obj.Id)
CheckError(err, "error with followers db scan")
followerCollection = append(followerCollection, obj)
}
return followerCollection
}
func GetActorFollowTotal(db *sql.DB, id string) (int, int) {
var following int
var followers int
query := `select count(following) from following where id=$1`
rows, err := db.Query(query, id)
CheckError(err, "error with following total db query")
defer rows.Close()
for rows.Next() {
err := rows.Scan(&following)
CheckError(err, "error with following total db scan")
}
query = `select count(follower) from follower where id=$1`
rows, err = db.Query(query, id)
CheckError(err, "error with followers total db query")
defer rows.Close()
for rows.Next() {
err := rows.Scan(&followers)
CheckError(err, "error with followers total db scan")
}
return following, followers
}
func AcceptFollow(activity Activity) Activity {
var accept Activity
accept.AtContext.Context = activity.AtContext.Context
accept.Type = "Accept"
var nActor Actor
accept.Actor = &nActor
accept.Actor.Id = activity.Object.Actor
var nObj ObjectBase
accept.Object = &nObj
accept.Object.Actor = activity.Actor.Id
var nNested NestedObjectBase
accept.Object.Object = &nNested
accept.Object.Object.Actor = activity.Object.Actor
accept.Object.Object.Type = "Follow"
accept.To = append(accept.To, activity.Object.Actor)
return accept
}
func RejectActivity(activity Activity) Activity {
var accept Activity
accept.AtContext.Context = activity.AtContext.Context
accept.Type = "Reject"
var nObj ObjectBase
accept.Object = &nObj
var nActor Actor
accept.Actor = &nActor
accept.Actor.Id = activity.Object.Actor
accept.Object.Actor = activity.Actor.Id
var nNested NestedObjectBase
accept.Object.Object = &nNested
accept.Object.Object.Actor = activity.Object.Actor
accept.Object.Object.Type = "Follow"
accept.To = append(accept.To, activity.Actor.Id)
return accept
}
func IsAlreadyFollowing(db *sql.DB, actor string, follow string) bool {
followers := GetActorFollowingDB(db, actor)
for _, e := range followers {
if e.Id == follow {
return true
}
}
return false;
}
func IsAlreadyFollower(db *sql.DB, actor string, follow string) bool {
followers := GetActorFollowDB(db, actor)
for _, e := range followers {
if e.Id == follow {
return true
}
}
return false;
}
func SetActorFollowerDB(db *sql.DB, activity Activity) Activity {
var query string
alreadyFollow := IsAlreadyFollower(db, activity.Actor.Id, activity.Object.Actor)
activity.Type = "Reject"
if activity.Actor.Id == activity.Object.Actor {
return activity
}
if alreadyFollow {
query = `delete from follower where id=$1 and follower=$2`
activity.Summary = activity.Object.Actor + " Unfollow " + activity.Actor.Id
_, err := db.Exec(query, activity.Actor.Id, activity.Object.Actor)
if CheckError(err, "error with follower db delete") != nil {
activity.Type = "Reject"
return activity
}
activity.Type = "Accept"
return activity
} else {
query = `insert into follower (id, follower) values ($1, $2)`
activity.Summary = activity.Object.Actor + " Follow " + activity.Actor.Id
_, err := db.Exec(query, activity.Actor.Id, activity.Object.Actor)
if CheckError(err, "error with follower db insert") != nil {
activity.Type = "Reject"
return activity
}
activity.Type = "Accept"
return activity
}
return activity
}
func SetActorFollowingDB(db *sql.DB, activity Activity) Activity {
var query string
alreadyFollowing := false
alreadyFollower := false
following := GetActorFollowingDB(db, activity.Object.Actor)
actor := FingerActor(activity.Actor.Id)
remoteActorFollowerCol := GetCollectionFromReq(actor.Followers)
for _, e := range following {
if e.Id == activity.Actor.Id {
alreadyFollowing = true
}
}
for _, e := range remoteActorFollowerCol.Items {
if e.Id == activity.Object.Actor {
alreadyFollower = true
}
}
activity.Type = "Reject"
if activity.Actor.Id == activity.Object.Actor {
return activity
}
if alreadyFollowing && alreadyFollower {
query = `delete from following where id=$1 and following=$2`
activity.Summary = activity.Object.Actor + " Unfollowing " + activity.Actor.Id
if !IsActorLocal(db, activity.Actor.Id) {
go DeleteActorCache(db, activity.Actor.Id)
}
_, err := db.Exec(query, activity.Object.Actor, activity.Actor.Id)
if CheckError(err, "error with following db delete") != nil {
activity.Type = "Reject"
return activity
}
activity.Type = "Accept"
return activity
}
if !alreadyFollowing && !alreadyFollower {
query = `insert into following (id, following) values ($1, $2)`
activity.Summary = activity.Object.Actor + " Following " + activity.Actor.Id
if !IsActorLocal(db, activity.Actor.Id) {
go WriteActorToCache(db, activity.Actor.Id)
}
_, err := db.Exec(query, activity.Object.Actor, activity.Actor.Id)
if CheckError(err, "error with following db insert") != nil {
activity.Type = "Reject"
return activity
}
activity.Type = "Accept"
return activity
}
return activity
}
func AutoFollow(db *sql.DB, actor string) {
following := GetActorFollowingDB(db, actor)
follower := GetActorFollowDB(db, actor)
isFollowing := false
for _, e := range follower {
for _, k := range following {
if e.Id == k.Id {
isFollowing = true
}
}
if !isFollowing && e.Id != Domain && e.Id != actor {
followActivity := MakeFollowActivity(db, actor, e.Id)
nActor := FingerActor(e.Id)
if nActor.Id != "" {
MakeActivityRequestOutbox(db, followActivity)
}
}
}
}
func MakeFollowActivity(db *sql.DB, actor string, follow string) Activity {
var followActivity Activity
followActivity.AtContext.Context = "https://www.w3.org/ns/activitystreams"
followActivity.Type = "Follow"
var obj ObjectBase
var nactor Actor
if actor == Domain {
nactor = GetActorFromDB(db, actor)
} else {
nactor = FingerActor(actor)
}
followActivity.Actor = &nactor
followActivity.Object = &obj
followActivity.Object.Actor = follow
followActivity.To = append(followActivity.To, follow)
return followActivity
}
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