ripple-api/app/v1/friend.go

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package v1
import (
"database/sql"
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"zxq.co/ripple/rippleapi/common"
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)
type friendData struct {
userData
IsMutual bool `json:"is_mutual"`
}
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type friendsGETResponse struct {
common.ResponseBase
Friends []friendData `json:"friends"`
}
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// FriendsGET is the API request handler for GET /friends.
// It retrieves an user's friends, and whether the friendship is mutual or not.
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func FriendsGET(md common.MethodData) common.CodeMessager {
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var myFrienders []int
myFriendersRaw, err := md.DB.Query("SELECT user1 FROM users_relationships WHERE user2 = ?", md.ID())
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if err != nil {
md.Err(err)
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return Err500
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}
defer myFriendersRaw.Close()
for myFriendersRaw.Next() {
var i int
err := myFriendersRaw.Scan(&i)
if err != nil {
md.Err(err)
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continue
}
myFrienders = append(myFrienders, i)
}
if err := myFriendersRaw.Err(); err != nil {
md.Err(err)
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}
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myFriendsQuery := `
SELECT
users.id, users.username, users.register_datetime, users.privileges, users.latest_activity,
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users_stats.username_aka,
users_stats.country
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FROM users_relationships
LEFT JOIN users
ON users_relationships.user2 = users.id
LEFT JOIN users_stats
ON users_relationships.user2=users_stats.id
WHERE users_relationships.user1=?
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`
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myFriendsQuery += common.Sort(md, common.SortConfiguration{
Allowed: []string{
"id",
"username",
"latest_activity",
},
Default: "users.id asc",
Table: "users",
}) + "\n"
results, err := md.DB.Query(myFriendsQuery+common.Paginate(md.Query("p"), md.Query("l"), 100), md.ID())
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if err != nil {
md.Err(err)
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return Err500
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}
var myFriends []friendData
defer results.Close()
for results.Next() {
newFriend := friendPuts(md, results)
for _, uid := range myFrienders {
if uid == newFriend.ID {
newFriend.IsMutual = true
break
}
}
myFriends = append(myFriends, newFriend)
}
if err := results.Err(); err != nil {
md.Err(err)
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}
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r := friendsGETResponse{}
r.Code = 200
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r.Friends = myFriends
return r
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}
func friendPuts(md common.MethodData, row *sql.Rows) (user friendData) {
var err error
err = row.Scan(&user.ID, &user.Username, &user.RegisteredOn, &user.Privileges, &user.LatestActivity, &user.UsernameAKA, &user.Country)
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if err != nil {
md.Err(err)
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return
}
return
}
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type friendsWithResponse struct {
common.ResponseBase
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Friends bool `json:"friend"`
Mutual bool `json:"mutual"`
}
// FriendsWithGET checks the current user is friends with the one passed in the request path.
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func FriendsWithGET(md common.MethodData) common.CodeMessager {
var r friendsWithResponse
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r.Code = 200
uid := common.Int(md.Query("id"))
if uid == 0 {
return r
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}
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err := md.DB.QueryRow("SELECT EXISTS(SELECT 1 FROM users_relationships WHERE user1 = ? AND user2 = ? LIMIT 1), EXISTS(SELECT 1 FROM users_relationships WHERE user2 = ? AND user1 = ? LIMIT 1)", md.ID(), uid, md.ID(), uid).Scan(&r.Friends, &r.Mutual)
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if err != sql.ErrNoRows && err != nil {
md.Err(err)
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return Err500
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}
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if !r.Friends {
r.Mutual = false
}
return r
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}
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// FriendsAddPOST adds an user to the friends.
func FriendsAddPOST(md common.MethodData) common.CodeMessager {
var u struct {
User int `json:"user"`
}
md.RequestData.Unmarshal(&u)
return addFriend(md, u.User)
}
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func addFriend(md common.MethodData, u int) common.CodeMessager {
if md.ID() == u {
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return common.SimpleResponse(406, "Just so you know: you can't add yourself to your friends.")
}
if !userExists(md, u) {
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return common.SimpleResponse(404, "I'd also like to be friends with someone who doesn't even exist (???), however that's NOT POSSIBLE.")
}
var (
relExists bool
isMutual bool
)
err := md.DB.QueryRow("SELECT EXISTS(SELECT 1 FROM users_relationships WHERE user1 = ? AND user2 = ?), EXISTS(SELECT 1 FROM users_relationships WHERE user2 = ? AND user1 = ?)", md.ID(), u, md.ID(), u).Scan(&relExists, &isMutual)
if err != nil && err != sql.ErrNoRows {
md.Err(err)
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return Err500
}
if !relExists {
_, err := md.DB.Exec("INSERT INTO users_relationships(user1, user2) VALUES (?, ?)", md.User.UserID, u)
if err != nil {
md.Err(err)
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return Err500
}
}
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var r friendsWithResponse
r.Code = 200
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r.Friends = true
r.Mutual = isMutual
return r
}
// userExists makes sure an user exists.
func userExists(md common.MethodData, u int) (r bool) {
err := md.DB.QueryRow("SELECT EXISTS(SELECT 1 FROM users WHERE id = ? AND "+
md.User.OnlyUserPublic(true)+")", u).Scan(&r)
if err != nil && err != sql.ErrNoRows {
md.Err(err)
}
return
}
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// FriendsDelPOST deletes an user's friend.
func FriendsDelPOST(md common.MethodData) common.CodeMessager {
var u struct {
User int `json:"user"`
}
md.RequestData.Unmarshal(&u)
return delFriend(md, u.User)
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}
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func delFriend(md common.MethodData, u int) common.CodeMessager {
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_, err := md.DB.Exec("DELETE FROM users_relationships WHERE user1 = ? AND user2 = ?", md.ID(), u)
if err != nil {
md.Err(err)
return Err500
}
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r := friendsWithResponse{
Friends: false,
Mutual: false,
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}
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r.Code = 200
return r
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}