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feed_follows_db.go
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/
feed_follows_db.go
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package main
import (
"errors"
"fmt"
)
type DBFeedFollows struct {
collection []FeedFollowsDBModel
}
type FeedFollowsDBModel struct {
Id string
UserId string
FeedId string
CreatedAt string
UpdatedAt string
}
func (dbFeedFollow *DBFeedFollows) save(feedFollow FeedFollowsDBModel, dbOperator *DB) (FeedFollowsDBModel, error) {
if !dbOperator.isConnected() {
dbOperator.connect()
}
existentFfModel, err := dbFeedFollow.getByIdUserAndIdFeed(feedFollow.UserId, feedFollow.FeedId, dbOperator)
if err != nil {
fmt.Println(fmt.Printf("ERROR on save: %s", err))
return feedFollow, errors.New(fmt.Sprintf("Error trying to save feed follow: %s", feedFollow.Id))
}
if existentFfModel.Id != "" {
fmt.Println("Constraint error: id user + id feed")
return existentFfModel, errors.New(fmt.Sprintf("Constraint error: id user + id feed"))
}
if !dbOperator.isConnected() {
dbOperator.connect()
}
msg, err := dbOperator.execute(feedFollow.Id, "save")
if err != nil {
fmt.Println(fmt.Printf("ERROR on save 2: %s", err))
return feedFollow, errors.New(fmt.Sprintf("Error trying to save feed follow: %s", feedFollow.Id))
}
dbFeedFollow.collection = append(dbFeedFollow.collection, feedFollow)
fmt.Println(fmt.Sprintf("SUCCESS: %s", msg))
return feedFollow, nil
}
func (dbFeedFollow *DBFeedFollows) getByIdUser(idUser string, dbOperator *DB) ([]FeedFollowsDBModel, error) {
var feedFollowModel []FeedFollowsDBModel
if !dbOperator.isConnected() {
dbOperator.connect()
}
msg, err := dbOperator.execute(idUser, "get by id user")
if err != nil {
fmt.Println(fmt.Printf("ERROR: %s", err))
return feedFollowModel, errors.New(fmt.Sprintf("error trying to get feed follow: %s", idUser))
}
fmt.Println(fmt.Sprintf("SUCCESS %s", msg))
for _, feedFollow := range dbFeedFollow.collection {
if feedFollow.UserId == idUser {
feedFollowModel = append(feedFollowModel, feedFollow)
}
}
return feedFollowModel, nil
}
func (dbFeedFollow *DBFeedFollows) getByIdFeed(idFeed string, dbOperator *DB) (FeedFollowsDBModel, error) {
var feedFollowModel FeedFollowsDBModel
if !dbOperator.isConnected() {
dbOperator.connect()
}
msg, err := dbOperator.execute(idFeed, "get by id feed")
if err != nil {
fmt.Println(fmt.Printf("ERROR: %s", err))
return feedFollowModel, errors.New(fmt.Sprintf("error trying to get feed follow: %s", idFeed))
}
fmt.Println(fmt.Sprintf("SUCCESS %s", msg))
for _, feedFollow := range dbFeedFollow.collection {
if feedFollow.FeedId == idFeed {
return feedFollow, nil
}
}
return feedFollowModel, nil
}
func (dbFeedFollow *DBFeedFollows) getByIdUserAndIdFeed(idUser string, idFeed string, dbOperator *DB) (FeedFollowsDBModel, error) {
var feedFollowModel FeedFollowsDBModel
if !dbOperator.isConnected() {
dbOperator.connect()
}
msg, err := dbOperator.execute(fmt.Sprintf("Id User: %s - Id Feed: %s", idUser, idFeed), "get by id user and id feed")
if err != nil {
fmt.Println(fmt.Printf("ERROR on getByUserAndIdFeed: %s", err))
return feedFollowModel, errors.New("error trying to get feed follow by id user and id feed")
}
fmt.Println(fmt.Sprintf("SUCCESS: %s", msg))
for _, ffM := range dbFeedFollow.collection {
if ffM.UserId == idUser && ffM.FeedId == idFeed {
return ffM, nil
}
}
return feedFollowModel, nil
}
func (dbFeedFollow *DBFeedFollows) deleteFeedFollow(idUser string, idFeedfollow string, dbOperator *DB) (bool, error) {
if !dbOperator.isConnected() {
dbOperator.connect()
}
msg, err := dbOperator.execute(fmt.Sprintf("Id User: %s - Id Feedfollow: %s", idUser, idFeedfollow), "delete feed follow")
if err != nil {
fmt.Println(fmt.Printf("ERROR on deleteFeedFollow: %s", err))
return false, errors.New("error trying to delete the feed follow")
}
fmt.Println(fmt.Sprintf("SUCCESS: %s", msg))
ffToRemove := -1
for i, ffm := range dbFeedFollow.collection {
if ffm.UserId == idUser && ffm.Id == idFeedfollow {
ffToRemove = i
}
}
if ffToRemove < 0 {
fmt.Println(fmt.Printf("ERROR on deleteFeedFollow: not found on DB"))
return false, errors.New("not found on DB")
}
if ffToRemove > -1 {
dbFeedFollow.collection[ffToRemove] = dbFeedFollow.collection[len(dbFeedFollow.collection)-1]
dbFeedFollow.collection = dbFeedFollow.collection[:len(dbFeedFollow.collection)-1]
}
return true, nil
}