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package main
import "net/http"
import "database/sql"
import _ "github.com/lib/pq"
import "encoding/json"
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, _ = GetActorFollowDB(db, id)
enc, _ := json.MarshalIndent(following, "", "\t")
w.Header().Set("Content-Type", "application/ld+json; profile=\"https://www.w3.org/ns/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", "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"")
w.Write(enc)
}
func SetActorFollowDB(db *sql.DB, activity Activity, actor string) Activity {
var query string
alreadyFollow := false
following, follower := GetActorFollowDB(db, actor)
if activity.Actor.Id == actor {
for _, e := range following {
if e.Id == activity.Object.Id {
alreadyFollow = true
}
}
if alreadyFollow {
query = `delete from following where id=$1 and following=$2`
activity.Summary = activity.Actor.Id + " Unfollow " + activity.Object.Id
} else {
query = `insert into following (id, following) values ($1, $2)`
activity.Summary = activity.Actor.Id + " Follow " + activity.Object.Id
}
} else {
for _, e := range follower {
if e.Id == activity.Actor.Id {
alreadyFollow = true
}
}
if alreadyFollow {
query = `delete from follower where id=$1 and follower=$2`
activity.Summary = activity.Actor.Id + " Unfollow " + activity.Object.Id
} else {
query = `insert into follower (id, follower) values ($1, $2)`
activity.Summary = activity.Actor.Id + " Follow " + activity.Object.Id
}
}
_, err := db.Exec(query, activity.Actor.Id, activity.Object.Id)
CheckError(err, "error with follow db insert/delete")
return activity
}
func GetActorFollowDB(db *sql.DB, id string) ([]ObjectBase, []ObjectBase) {
var followingCollection []ObjectBase
var followerCollection []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)
}
query = `select follower from follower where id=$1`
rows, err = db.Query(query, id)
CheckError(err, "error with followers 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 followingCollection, 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, actor Actor) Activity {
var accept Activity
var obj ObjectBase
obj.Type = activity.Type
obj.Actor = activity.Actor
var nobj NestedObjectBase
obj.Object = &nobj
obj.Object.Id = activity.Object.Id
accept.AtContext.Context = activity.AtContext.Context
accept.Type = "Accept"
var nactor Actor
accept.Actor = &nactor
accept.Actor.Id = actor.Id
accept.Object = &obj
accept.To = append(accept.To, activity.Object.Id)
return accept
}
func RejectFollow(activity Activity, actor Actor) Activity {
var accept Activity
var obj ObjectBase
obj.Type = activity.Type
obj.Actor = activity.Actor
obj.Object = new(NestedObjectBase)
obj.Object.Id = activity.Object.Id
accept.AtContext.Context = activity.AtContext.Context
accept.Type = "Reject"
accept.Actor = &actor
accept.Object = &obj
return accept
}
func SetActorFollowingDB(db *sql.DB, activity Activity) Activity{
var query string
alreadyFollow := false
_, follower := GetActorFollowDB(db, activity.Object.Id)
for _, e := range follower {
if e.Id == activity.Object.Id {
alreadyFollow = true
}
}
if alreadyFollow {
query = `delete from follower where id=$1 and follower=$2`
activity.Summary = activity.Actor.Id + " Unfollow " + activity.Object.Id
} else {
query = `insert into follower (id, follower) values ($1, $2)`
activity.Summary = activity.Actor.Id + " Follow " + activity.Object.Id
}
_, err := db.Exec(query, activity.Object.Id, activity.Actor.Id)
if err != nil {
CheckError(err, "error with follow db insert/delete")
activity.Type = "Reject"
return activity
}
activity.Type = "Accept"
return activity
}
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