Im Grunde nach MVC umstrukturiert und Funktionen in Handlers, die eine Session als Parameter erhalten haben zu Sessionmethoden umgewandelt
This commit is contained in:
380
packages/data/db.go
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380
packages/data/db.go
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@ -0,0 +1,380 @@
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package data
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import (
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"bufio"
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"database/sql"
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"fmt"
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"os"
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"strings"
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"syscall"
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"github.com/go-sql-driver/mysql"
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"golang.org/x/term"
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)
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type DB struct {
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*sql.DB
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Name string
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}
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func getUsername() (string, error) {
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user := os.Getenv("DB_USER")
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if user == "" {
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var err error
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fmt.Printf("DB Benutzer: ")
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user, err = bufio.NewReader(os.Stdin).ReadString('\n')
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if err != nil {
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return "", fmt.Errorf("getUsername: bufio.NewReader(os.Stdin).ReadString('\n'): %v", err)
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}
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}
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return strings.TrimSpace(user), nil
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}
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func getPassword() (string, error) {
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pass := os.Getenv("DB_PASS")
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if pass == "" {
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fmt.Printf("DB Passwort: ")
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bytePass, err := term.ReadPassword(int(syscall.Stdin))
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if err != nil {
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return "", fmt.Errorf("getCredentials: term.ReadPassword(int(syscall.Stdin)): %v", err)
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}
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fmt.Println()
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pass = strings.TrimSpace(string(bytePass))
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}
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return pass, nil
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}
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func getCredentials() (string, string, error) {
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user, err := getUsername()
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if err != nil {
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return "", "", fmt.Errorf("getCredentials: getUsername(): %v", err)
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}
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pass, err := getPassword()
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if err != nil {
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return "", "", fmt.Errorf("getCredentials: getPassword(): %v", err)
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}
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return user, pass, nil
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}
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func OpenDB(dbName string) (*DB, error) {
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var err error
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db := new(DB)
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cfg := mysql.NewConfig()
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cfg.DBName = dbName
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cfg.User, cfg.Passwd, err = getCredentials()
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if err != nil {
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return nil, fmt.Errorf("Open: getCredentials(): %v\n", err)
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}
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db.Name = dbName
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db.DB, err = sql.Open("mysql", cfg.FormatDSN())
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if err != nil {
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return nil, fmt.Errorf("Open: sql.Open(\"mysql\", cfg.FormatDSN()): %v\n", err)
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}
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if err := db.Ping(); err != nil {
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return nil, fmt.Errorf("Open: db.Ping(): %v\n", err)
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}
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return db, nil
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}
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func (db *DB) WriteBriefing(b *Briefing) error {
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result, err := db.Exec(`
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INSERT INTO briefings
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(date, time, location, document_name, as_of, instructor_id)
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VALUES
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(?, ?, ?, ?, ?, ?)
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`, b.Date, b.Time, b.Location, b.DocumentName, b.AsOf, b.InstructorID)
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if err != nil {
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return fmt.Errorf("*DB.writeBriefing: db.Exec(): %v\n", err)
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}
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b.ID, err = result.LastInsertId()
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if err != nil {
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return fmt.Errorf("*DB.writeBriefing: result.LastInsertId(): %v\n", err)
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}
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return nil
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}
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func (db *DB) WriteParticipant(p *Participant) error {
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result, err := db.Exec(`
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INSERT INTO participants
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(first_name, last_name, company)
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VALUES
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(?, ?, ?)
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`, p.FirstName, p.LastName, p.Company)
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if err != nil {
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return fmt.Errorf("*DB.writeParticipants: db.Exec(): %v\n", err)
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}
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p.ID, err = result.LastInsertId()
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if err != nil {
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return fmt.Errorf("*DB.writeParticipants: result.LastInsertId(): %v\n", err)
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}
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return nil
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}
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func (db *DB) WriteGivenAnswer(b *Briefing, p *Participant, q *Question, g int) error {
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_, err := db.Exec(`
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INSERT INTO given_answers
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(briefing_id, participant_id, question_id, given_answer)
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VALUES
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(?, ?, ?, ?)
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`, b.ID, p.ID, q.ID, g)
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if err != nil {
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return fmt.Errorf("*DB.writeGivenAnswers: db.Exec(): %v\n", err)
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}
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return nil
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}
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func (db *DB) WriteAllDataOfBriefing(b *Briefing, sp *[]*Participant, sq *[]*Question, sg *[]*GivenAnswer) error {
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if err := db.WriteBriefing(b); err != nil {
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return fmt.Errorf("*DB.WriteAllDataOfBriefing: db.writeBriefing(): %v\n", err)
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}
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for _, p := range *sp {
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if err := db.WriteParticipant(p); err != nil {
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return fmt.Errorf("*DB.WriteAllDataOfBriefing: db.writeParticipants(): %v\n", err)
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}
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}
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for _, p := range *sp {
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for i, q := range *sq {
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db.WriteGivenAnswer(b, p, q, i)
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}
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}
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return nil
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}
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func (db *DB) GetAllOverviewTableData() ([]*OverviewTableData, error) {
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rows, err := db.Query(`
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SELECT
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i.first_name,
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i.last_name,
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b.date,
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b.time,
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b.location,
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b.document_name,
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b.as_of,
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p.first_name,
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p.last_name,
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p.company
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FROM given_answers AS g
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INNER JOIN briefings AS b
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ON b.id = g.briefing_id
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INNER JOIN participants AS p
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ON p.id = g.participant_id
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INNER JOIN questions AS q
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ON q.id = g.question_id
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INNER JOIN instructors AS i
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ON i.id = b.instructor_id
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WHERE
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q.id = 1
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ORDER BY
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b.id DESC,
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p.id
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`)
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if err != nil {
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return nil, fmt.Errorf("*DB.ReadAllBriefings: db.Query(): %v\n", err)
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}
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defer rows.Close()
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data := make([]*OverviewTableData, 0)
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for rows.Next() {
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otd := new(OverviewTableData)
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err := rows.Scan(
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&otd.InstructorFirstName,
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&otd.InstructorLastName,
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&otd.BriefingDate,
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&otd.BriefingTime,
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&otd.BriefingLocation,
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&otd.BriefingDocumentName,
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&otd.BriefingAsOf,
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&otd.ParticipantFirstName,
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&otd.ParticipantLastName,
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&otd.ParticipantCompany,
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)
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if err != nil {
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return nil, fmt.Errorf("*DB.ReadAllBriefings: rows.Scan(): %v\n", err)
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}
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data = append(data, otd)
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}
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return data, nil
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}
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func (db *DB) GetOverviewTableDataByName(n string) (*[]*OverviewTableData, error) {
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rows, err := db.Query(`
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SELECT
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i.first_name,
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i.last_name,
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b.date,
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b.time,
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b.location,
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b.document_name,
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b.as_of,
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p.first_name,
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p.last_name,
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p.company
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FROM given_answers AS g
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INNER JOIN briefings AS b
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ON b.id = g.briefing_id
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INNER JOIN participants AS p
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ON p.id = g.participant_id
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INNER JOIN instructors AS i
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ON i.id = b.instructor_id
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WHERE
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q.id = 1 AND
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i.first_name LIKE ? OR
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i.last_name LIKE ? OR
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p.first_name LIKE ? OR
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p.last_name LIKE ?
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ORDER BY
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b.id DESC,
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p.id
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`, "%"+n+"%", "%"+n+"%", "%"+n+"%", "%"+n+"%")
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if err != nil {
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return nil, fmt.Errorf("*DB.GetOverviewTableDataByName: db.Query(): %v\n", err)
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}
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defer rows.Close()
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data := make([]*OverviewTableData, 0)
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for rows.Next() {
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otd := new(OverviewTableData)
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err := rows.Scan(
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&otd.InstructorFirstName,
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&otd.InstructorLastName,
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&otd.BriefingDate,
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&otd.BriefingTime,
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&otd.BriefingLocation,
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&otd.BriefingDocumentName,
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&otd.BriefingAsOf,
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&otd.ParticipantFirstName,
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&otd.ParticipantLastName,
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&otd.ParticipantCompany,
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)
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if err != nil {
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return nil, fmt.Errorf("*DB.ReadAllBriefings: rows.Scan(): %v\n", err)
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}
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data = append(data, otd)
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}
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return &data, nil
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}
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func (db *DB) GetLastID(table string) (int, error) {
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var id int
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row := db.QueryRow(`
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SELECT id
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FROM ?
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ORDER BY id DESC
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LIMIT 0, 1
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`, table)
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if err := row.Scan(&id); err != nil {
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return -1, fmt.Errorf("*DB.GetLastID: row.Scan(): %v\n", err)
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}
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return id, nil
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}
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func (db *DB) GetInstructors() ([]*Instructor, error) {
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rows, err := db.Query(`
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SELECT *
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FROM instructors
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ORDER BY
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last_name,
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first_name
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`)
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if err != nil {
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return nil, fmt.Errorf("*DB.GetInstructors: db.Query(): %v\n", err)
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}
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defer rows.Close()
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instructors := make([]*Instructor, 0)
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for rows.Next() {
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instructor := new(Instructor)
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if err = rows.Scan(&instructor.ID, &instructor.FirstName, &instructor.LastName); err != nil {
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return nil, fmt.Errorf("*DB.GetInstructors: rows.Scan(): %v\n", err)
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}
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instructors = append(instructors, instructor)
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}
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return instructors, nil
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}
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func (db *DB) GetQuestions(nums []string) ([]Question, error) {
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rows, err := db.Query(`
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SELECT *
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FROM questions
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WHERE id IN (` + strings.Join(nums, ", ") + `)
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`)
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if err != nil {
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return nil, fmt.Errorf("*DB.GetQuestions: db.Query(): %v\n", err)
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}
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defer rows.Close()
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questions := make([]Question, 0)
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for rows.Next() {
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q := new(Question)
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a1 := new(Answer)
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a2 := new(Answer)
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a3 := new(Answer)
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a4 := new(Answer)
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a1.ID = 1
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a2.ID = 2
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a3.ID = 3
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a4.ID = 4
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if err := rows.Scan(&q.ID, &q.Text, &a1.Text, &a2.Text, &a3.Text, &a4.Text, &q.Correct); err != nil {
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return nil, fmt.Errorf("*DB.GetQuestions: rows.Scan(): %v\n", err)
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}
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q.Answers = append(q.Answers, *a1)
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q.Answers = append(q.Answers, *a2)
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q.Answers = append(q.Answers, *a3)
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q.Answers = append(q.Answers, *a4)
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questions = append(questions, *q)
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}
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return questions, nil
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}
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func (db *DB) GetGivenAnswers(bid, pid int64, sq []Question) ([]int, error) {
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answers := make([]int, 0)
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query := `
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SELECT given_answer
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FROM given_answers
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WHERE
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briefing_id = ? AND
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participant_id = ? AND
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question_id = ?
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`
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for _, q := range sq {
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var answer int
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row := db.QueryRow(query, bid, pid, q.ID)
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if err := row.Scan(&answer); err != nil {
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return nil, fmt.Errorf("*DB.GetGivenAnswers: row.Scan(): %v\n", err)
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}
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answers = append(answers, answer)
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}
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return answers, nil
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}
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57
packages/data/dbStructs.go
Normal file
57
packages/data/dbStructs.go
Normal file
@ -0,0 +1,57 @@
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package data
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type Person struct {
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ID int64
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FirstName string
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LastName string
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}
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type Instructor Person
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type Participant struct {
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Person
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Company string
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Login string
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}
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type Briefing struct {
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ID int64
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Date string
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Time string
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Location string
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DocumentName string
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AsOf string
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InstructorID int64
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}
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type Answer struct {
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ID int64
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Text string
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}
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type Question struct {
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ID int64
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Text string
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Answers []Answer
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Correct int
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}
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type GivenAnswer struct {
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BriefingID int64
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ParticipantID int64
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QuestionID int64
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GivenAnswer int
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}
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type OverviewTableData struct {
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InstructorFirstName string
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InstructorLastName string
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BriefingDate string
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BriefingTime string
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BriefingLocation string
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BriefingDocumentName string
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BriefingAsOf string
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ParticipantFirstName string
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ParticipantLastName string
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ParticipantCompany string
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}
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Reference in New Issue
Block a user