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database.go
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database.go
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package main
import (
"database/sql"
"errors"
"github.com/Symantec/ldap-group-management/lib/metrics"
_ "github.com/lib/pq"
_ "github.com/mattn/go-sqlite3"
"log"
"strings"
"time"
)
const profileDBFilename = "requests.sqlite3"
//Initialsing database -- There are two cases for the database, one is sqlite and the other one is postgrep
func initDB(state *RuntimeState) (err error) {
storageURL := state.Config.Base.StorageURL
if storageURL == "" {
storageURL = "sqlite:"
}
splitString := strings.SplitN(storageURL, ":", 2)
if len(splitString) < 1 {
log.Print("invalid string")
err := errors.New("Bad storage url string")
return err
}
//state.remoteDBQueryTimeout = time.Second * 2
//initialSleep := time.Second * 3
switch splitString[0] {
case "sqlite":
log.Print("doing sqlite")
return initDBSQlite(state, splitString[1])
case "postgresql":
log.Print("doing postgres")
return initDBPostgres(state, storageURL)
default:
log.Print("invalid storage url string")
err := errors.New("Bad storage url string")
return err
}
err = errors.New("invalid state")
return err
}
func initDBSQlite(state *RuntimeState, db string) (err error) {
state.dbType = "sqlite"
state.db, err = sql.Open("sqlite3", db)
if err != nil {
return err
}
if true {
sqlStmt := `create table if not exists pending_requests (id INTEGER PRIMARY KEY AUTOINCREMENT, username text not null, groupname text not null, time_stamp int not null);`
_, err = state.db.Exec(sqlStmt)
if err != nil {
log.Printf("init sqlite3 err: %s: %q\n", err, sqlStmt)
return err
}
permissionStmt := `create table if not exists permissions (id INTEGER PRIMARY KEY AUTOINCREMENT, groupname text not null,
resource_type int not null, resource text not null, permission int not null,
unique (groupname, resource_type, resource));`
_, err = state.db.Exec(permissionStmt)
if err != nil {
log.Printf("init table permissions err: %s: %q\n", err, permissionStmt)
return err
}
}
return nil
}
func initDBPostgres(state *RuntimeState, db string) (err error) {
state.dbType = "postgres"
state.db, err = sql.Open("postgres", db)
if err != nil {
return err
}
log.Printf("post open")
/// This should be changed to take care of DB schema
if true {
sqlStmt := `create table if not exists pending_requests (id SERIAL PRIMARY KEY, username text not null, groupname text not null, time_stamp int not null);`
_, err = state.db.Exec(sqlStmt)
if err != nil {
log.Printf("init postgres err: %s: %q\n", err, sqlStmt)
return err
}
permissionStmt := `create table if not exists permissions (id SERIAL PRIMARY KEY, groupname text not null, resource_type int not null, resource text not null, permission int not null,
unique (groupname, resource_type, resource));`
_, err = state.db.Exec(permissionStmt)
if err != nil {
log.Printf("init table permissions failed, err: %s", err)
return err
}
}
return nil
}
//insert a request into DB
var insertRequestStmt = map[string]string{
"sqlite": "insert into pending_requests(username, groupname, time_stamp) values (?,?,?);",
"postgres": "insert into pending_requests(username, groupname, time_stamp) values ($1,$2,$3);",
}
func insertRequestInDB(username string, groupnames []string, state *RuntimeState) error {
stmtText := insertRequestStmt[state.dbType]
stmt, err := state.db.Prepare(stmtText)
if err != nil {
log.Print("Error Preparing statement")
log.Fatal(err)
}
defer stmt.Close()
for _, entry := range groupnames {
IsgroupMember, _, err := state.Userinfo.IsgroupmemberorNot(entry, username)
if err != nil {
log.Println(err)
return err
}
if entryExistsorNot(username, entry, state) || IsgroupMember {
continue
} else {
_, err = stmt.Exec(username, entry, time.Now().Unix())
if err != nil {
return err
}
}
}
return nil
}
//delete the request after approved or declined
var deleteEntryStmt = map[string]string{
"sqlite": "delete from pending_requests where username= ? and groupname= ?;",
"postgres": "delete from pending_requests where username=$1 and groupname= $2;",
}
func deleteEntryInDB(username string, groupname string, state *RuntimeState) error {
stmtText := deleteEntryStmt[state.dbType]
stmt, err := state.db.Prepare(stmtText)
if err != nil {
log.Print("Error Preparing statement")
log.Fatal(err)
}
defer stmt.Close()
_, err = stmt.Exec(username, groupname)
if err != nil {
return err
}
return nil
}
//deleting all groups in DB which are deleted from Target LDAP
var deleteEntryofGroupsStmt = map[string]string{
"sqlite": "delete from pending_requests where groupname= ?;",
"postgres": "delete from pending_requests where groupname= $1;",
}
func deleteEntryofGroupsInDB(groupnames []string, state *RuntimeState) error {
stmtText := deleteEntryofGroupsStmt[state.dbType]
stmt, err := state.db.Prepare(stmtText)
if err != nil {
log.Print("Error Preparing statement")
return err
}
defer stmt.Close()
for _, entry := range groupnames {
_, err = stmt.Exec(entry)
if err != nil {
return err
}
}
return nil
}
//Search for a particular request made by a user (or) a group. (for my_pending_actions)
var findrequestsofUserStmt = map[string]string{
"sqlite": "select groupname from pending_requests where username=?;",
"postgres": "select groupname from pending_requests where username=$1;",
}
func findrequestsofUserinDB(username string, state *RuntimeState) ([]string, bool, error) {
stmtText := findrequestsofUserStmt[state.dbType]
stmt, err := state.db.Prepare(stmtText)
if err != nil {
log.Print("Error Preparing statement")
log.Fatal(err)
}
defer stmt.Close()
var groupname []string
rows, err := stmt.Query(username)
if err != nil {
if err.Error() == "sql: no rows in result set" {
log.Printf("err='%s'", err)
return nil, false, nil
} else {
log.Printf("Problem with db ='%s'", err)
return nil, false, err
}
}
defer rows.Close()
for rows.Next() {
var groupName string
err = rows.Scan(&groupName)
groupname = append(groupname, groupName)
}
return groupname, true, nil
}
//looks in the DB if the entry already exists or not
var entryExistsorNotStmt = map[string]string{
"sqlite": "select * from pending_requests where username=? and groupname=?;",
"postgres": "select * from pending_requests where username=$1 and groupname=$2;",
}
func entryExistsorNot(username string, groupname string, state *RuntimeState) bool {
stmtText := entryExistsorNotStmt[state.dbType]
stmt, err := state.db.Prepare(stmtText)
if err != nil {
log.Print("Error Preparing statement")
log.Fatal(err)
}
defer stmt.Close()
rows, err := stmt.Query(username, groupname)
if err != nil {
if err.Error() == "sql: no rows in result set" {
log.Printf("err='%s'", err)
return false
} else {
log.Printf("Problem with db ='%s'", err)
return false
}
}
defer rows.Close()
if rows.Next() {
return true
}
return false
}
//(username,groupname) get whole db entries.
var getDBentriesStmt = map[string]string{
"sqlite": "select username,groupname from pending_requests;",
"postgres": "select username,groupname from pending_requests;",
}
func getDBentries(state *RuntimeState) ([][]string, error) {
start := time.Now()
stmtText := getDBentriesStmt[state.dbType]
stmt, err := state.db.Prepare(stmtText)
if err != nil {
log.Print("Error Preparing statement")
log.Fatal(err)
}
defer stmt.Close()
var entry [][]string
rows, err := stmt.Query()
if err != nil {
if err.Error() == "sql: no rows in result set" {
log.Printf("err='%s'", err)
return nil, err
} else {
log.Printf("Problem with db ='%s'", err)
return nil, err
}
}
defer rows.Close()
metrics.MetricLogExternalServiceDuration("storage", time.Since(start))
var eachEntry1 string
var eachEntry2 string
for rows.Next() {
err = rows.Scan(&eachEntry1, &eachEntry2)
var eachentry = []string{eachEntry1, eachEntry2}
entry = append(entry, eachentry)
}
return entry, nil
}