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SqlQueries.go
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SqlQueries.go
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package main
import (
"encoding/json"
"fmt"
"log"
)
func GetAllPlatforms(requestBody []byte) (string, error) {
queryString := "SELECT RowId, Name, Description FROM Platform"
ndrs := GetAllNameDescriptionRows(queryString)
var pmf PlatformsMasterFile
for _, v := range(ndrs) {
var p Platform
p.RowId = v.RowId
p.Name = v.Name
p.Description = v.Description
pmf.Platforms = append(pmf.Platforms, p)
}
j, err := json.Marshal(pmf)
if (err!=nil) {
log.Printf("Error while marshalling platform json: %s", err)
return "", err
}
return fmt.Sprintf("%s", j), err
}
func GetAllGenres(requestBody[] byte) (string, error) {
queryString := "SELECT RowId, Name, Description FROM Genre"
ndrs := GetAllNameDescriptionRows(queryString)
var gmf GenresMasterFile
for _, v := range(ndrs) {
var genre Genre
genre.RowId = v.RowId
genre.Name = v.Name
genre.Description = v.Description
gmf.Genres = append(gmf.Genres, genre)
}
j, err := json.Marshal(gmf)
if err!=nil {
log.Print("Error while marshalling genres: %s", err)
return "", err
}
return fmt.Sprintf("%s", j), err
}
func GetAllHardwareTypes(requestBody[] byte) (string, error) {
queryString := "SELECT RowId, Name, Description FROM HardwareType"
ndrs := GetAllNameDescriptionRows(queryString)
var htmf HardwareTypesMasterFile
for _, v := range(ndrs) {
var ht HardwareType
ht.RowId = v.RowId
ht.Name = v.Name
ht.Description = v.Description
htmf.HardwareTypes = append(htmf.HardwareTypes, ht)
}
j, err := json.Marshal(htmf)
if err!=nil {
log.Printf("Error while marshalling hardware types json: %s", err)
return "", err
}
return fmt.Sprintf("%s", j), err
}
func GetAllNameDescriptionRows(queryString string) []NameDescriptionTable {
db := getDbConnection()
defer db.Close()
tx := getDbTransaction(db)
defer tx.Commit()
stmt := prepareQuery(tx, queryString)
defer stmt.Close()
rs, err := stmt.Query()
if err!=nil {
log.Fatal(err)
}
var items []NameDescriptionTable
for rs.Next() {
var item NameDescriptionTable
rs.Scan(&item.RowId, &item.Name, &item.Description)
items = append(items, item)
}
return items
}
func SaveGameFromJson(requestBody []byte) (string, error) {
g := Game{}
err := json.Unmarshal(requestBody, &g)
if err!=nil {
return "", err
}
return SaveGame(g)
}
func SaveGame(g Game) (string, error) {
/* At this point I could check to see if an identical game has been saved (e.g. same title/platform) and raise
* an error if that is the case, but at this point I won't do that. It would be possible to have this situation. For
* instance there are two different versions of "Tetris" for the NES (by Nintendo and Tengen).
*
* Maybe at a later date we could have something in place that will go back and ask the user for confirmation if this
* is the case.
*/
j, err := GetGameById(fmt.Sprintf("%d",g.RowId))
if err!=nil {
log.Printf("Error while retrieving game %s during save operation: %s", g, err)
return "", err
}
existingGame := Game{}
err = json.Unmarshal([]byte(j), &existingGame)
if err!=nil {
log.Printf("Error unmrashaling json %s: %s", j, err)
return "", err
}
if existingGame.RowId==g.RowId && g.RowId!=0 {
return updateGame(g)
}
return addGame(g)
}
func addGame(g Game) (string, error) {
log.Printf("Adding new game %s", g)
insertString := "INSERT INTO Game (Title, Genre, Platform, NumberOwned, NumberBoxed, NumberOfManuals, DatePurchased, "
insertString += "ApproximatePurchaseDate, Notes) "
insertString += "VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)"
stmt, closerFunc := GetQuery(insertString)
defer closerFunc()
approximatePurchaseDate := 0
if g.ApproximatePurchaseDate {
approximatePurchaseDate = 1
}
_, err := stmt.Exec(g.Title, g.Genre, g.Platform, g.NumberOwned, g.NumberBoxed, g.NumberOfManuals, g.DatePurchased,
approximatePurchaseDate, g.Notes)
if err!=nil {
log.Printf("Error while adding new game %s: %s", g, err)
}
return "", err
}
func updateGame(g Game) (string, error) {
log.Printf("Updating game %s with row id of %d", g, g.RowId)
updateString := "UPDATE GAME "
updateString += "SET Title=?, Genre=?, Platform=?, NumberOwned=?, NumberBoxed=?, NumberOfManuals=?, DatePurchased=?, "
updateString += "ApproximatePurchaseDate=?, Notes=? "
updateString += "WHERE RowId=?"
stmt, closerFunc := GetQuery(updateString)
defer closerFunc()
approximatePurchaseDate := 0
if g.ApproximatePurchaseDate {
approximatePurchaseDate = 1
}
_, err := stmt.Exec(g.Title, g.Genre, g.Platform, g.NumberOwned, g.NumberBoxed, g.NumberOfManuals, g.DatePurchased,
approximatePurchaseDate, g.Notes, g.RowId)
if err!=nil {
log.Printf("Error while updating existing game %s: %s", g, err)
}
return "", err
}
func GetAllGames(requestBody []byte) (string, error) {
queryString := "SELECT g.RowId, g.Title, g.Genre, COALESCE(p.Name, ''), g.NumberOwned, g.NumberBoxed, "
queryString += "g.NumberOfManuals, g.DatePurchased, g.ApproximatePurchaseDate, g.Notes "
queryString += "FROM Game g "
queryString += "LEFT JOIN Platform p ON g.Platform=p.RowId "
queryString += "LEFT JOIN Genre gen on g.Genre=gen.RowId "
var gameList GameList
var err error
stmt, closerFunc := GetQuery(queryString)
defer closerFunc()
rs, err := stmt.Query()
if err!=nil {
log.Printf("Error while running sql query to retrieve games: \n%s\n%s", queryString, err)
return "", err
}
for rs.Next() {
g := Game{}
err = rs.Scan(&g.RowId, &g.Title, &g.Genre, &g.Platform, &g.NumberOwned, &g.NumberBoxed, &g.NumberOfManuals,
&g.DatePurchased, &g.ApproximatePurchaseDate, &g.Notes)
if (err!=nil) {
log.Printf("Error while scanning games resultset: %s", err)
return "", err
}
gameList.Games = append(gameList.Games, g)
}
j, err := json.Marshal(gameList)
if err!=nil {
log.Printf("Error while unmarshalling games json: %s", err)
}
return string(j), err
}
func GetGamesByNameAndPlatform(g Game) ([]Game, error) {
queryString := "SELECT g.RowId, g.Title, g.Genre, COALESCE(p.Name, ''), g.NumberOwned, g.NumberBoxed, "
queryString += "g.NumberOfManuals, g.DatePurchased, g.ApproximatePurchaseDate, g.Notes "
queryString += "FROM Game g "
queryString += "LEFT JOIN Platform p ON g.Platform=p.RowId "
queryString += "LEFT JOIN Genre gen on g.Genre=gen.RowId "
queryString += "WHERE g.Title = ? AND g.Platform = ?"
stmt, closerFunc := GetQuery(queryString)
defer closerFunc()
var gs []Game
rs, err := stmt.Query(g.Title, g.Platform)
if err!=nil {
return gs, err
}
for rs.Next() {
g := Game{}
err = rs.Scan(&g.RowId, &g.Title, &g.Genre, &g.Platform, &g.NumberOwned, &g.NumberBoxed, &g.NumberOfManuals,
&g.DatePurchased, &g.ApproximatePurchaseDate, &g.Notes)
if err!=nil {
return gs, err
}
gs = append(gs, g)
}
return gs, err
}
type GameResult struct {
Game
PlatformId string
GenreId string
}
func GetGameById(gameId string) (string, error) {
var err error
queryString := "SELECT g.RowId, g.Title, g.Genre, COALESCE(gen.Name, ''), g.Platform, COALESCE(p.Name, ''), "
queryString += "g.NumberOwned, g.NumberBoxed, g.NumberOfManuals, g.DatePurchased, g.ApproximatePurchaseDate, g.Notes "
queryString += "FROM Game g "
queryString += "LEFT JOIN Platform p ON g.Platform=p.RowId "
queryString += "LEFT JOIN Genre gen on g.Genre=gen.RowId "
queryString += "WHERE g.RowId=? "
stmt, closerFunc := GetQuery(queryString)
defer closerFunc()
rs, err := stmt.Query(gameId)
if err!=nil {
return "", err
}
g := GameResult{}
for rs.Next() {
err = rs.Scan(&g.RowId, &g.Title, &g.GenreId, &g.Genre, &g.PlatformId, &g.Platform, &g.NumberOwned,
&g.NumberBoxed, &g.NumberOfManuals, &g.DatePurchased, &g.ApproximatePurchaseDate, &g.Notes)
if err!=nil {
return "", err
}
}
j, err := json.Marshal(g)
return string(j), err
}
func DeleteGame(requestBody []byte) (string, error) {
var err error
var g Game
err = json.Unmarshal(requestBody, &g)
if err!=nil {
return "", err
}
deleteString := "DELETE FROM GAME WHERE RowId=?"
stmt, closerFunc := GetQuery(deleteString)
defer closerFunc()
_, err = stmt.Exec(g.RowId)
return "", err
}
func GetPlatformByName(name string) (Platform, error) {
var err error
var p Platform
queryString := "SELECT RowId, * FROM Platform WHERE Name=?"
stmt, closerFunc := GetQuery(queryString)
defer closerFunc()
rs, err := stmt.Query(name)
if err!=nil {
return p, err
}
for rs.Next() {
err = rs.Scan(&p.RowId, &p.Name, &p.Description)
if err!=nil {
return p, err
}
}
return p, err
}
func AddPlatform(platform Platform) error {
var err error
insertString := "INSERT INTO Platform (Name, Description) VALUES (?, ?)"
stmt, closerFunc := GetQuery(insertString)
defer closerFunc()
_, err = stmt.Exec(platform.Name, platform.Description)
return err
}
func GetGenreByName(name string) (Genre, error) {
var err error
var g Genre
queryString := "SELECT RowId, * FROM Genre WHERE Name=?"
stmt, closerFunc := GetQuery(queryString)
defer closerFunc()
rs, err := stmt.Query(name)
if err!=nil {
return g, err
}
for rs.Next() {
err = rs.Scan(&g.RowId, &g.Name, &g.Description)
if err!=nil {
return g, err
}
}
return g, err
}
func AddGenre(genre Genre) error {
var err error
queryString := "INSERT INTO Genre (Name, Description) VALUES (?, ?)"
stmt, closerFunc := GetQuery(queryString)
defer closerFunc()
_, err = stmt.Exec(genre.Name, genre.Description)
return err
}
func GetHardwareTypeByName(name string) (HardwareType, error) {
var err error
var ht HardwareType
queryString := "SELECT RowId, * From HardwareType WHERE Name=?"
stmt, closerFunc := GetQuery(queryString)
defer closerFunc()
rs, err := stmt.Query(name)
if err!=nil {
return ht, err
}
for rs.Next() {
err = rs.Scan(&ht.RowId, &ht.Name, &ht.Description)
if err!=nil {
return ht, err
}
}
return ht, err
}
func AddHardwareType(ht HardwareType) error {
var err error
queryString := "INSERT INTO HardwareType (Name, Description) VALUES (?, ?)"
stmt, closerFunc := GetQuery(queryString)
defer closerFunc()
_, err = stmt.Exec(ht.Name, ht.Description)
return err
}