Nach Suchbegriff aus Datenbank lesen implementiert, außerdem structs mit new() instanziiert

i und j sollten jetzt richtig verwendet werden

.gitignore

@@ -0,0 +1 @@
+create_tables.sql

go.mod

@@ -1,3 +1,10 @@
 module streifling.com/jason/sicherheitsunterweisung
 
 go 1.21.1
+
+require (
+	github.com/go-sql-driver/mysql v1.7.1
+	golang.org/x/term v0.13.0
+)
+
+require golang.org/x/sys v0.13.0 // indirect

go.sum

@@ -0,0 +1,6 @@
+github.com/go-sql-driver/mysql v1.7.1 h1:lUIinVbN1DY0xBg0eMOzmmtGoHwWBbvnWubQUrtU8EI=
+github.com/go-sql-driver/mysql v1.7.1/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
+golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
+golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.13.0 h1:bb+I9cTfFazGW51MZqBVmZy7+JEJMouUHTUSKVQLBek=
+golang.org/x/term v0.13.0/go.mod h1:LTmsnFJwVN6bCy1rVCoS+qHT1HhALEFxKncY3WNNh4U=

main.go

@@ -1,68 +1,38 @@
 package main
 
 import (
-	"fmt"
-	"html/template"
 	"log"
 	"net/http"
+
+	"streifling.com/jason/sicherheitsunterweisung/packages/db"
+	"streifling.com/jason/sicherheitsunterweisung/packages/server"
+	"streifling.com/jason/sicherheitsunterweisung/packages/types"
 )
 
-type Person struct {
+func writeBriefing(ch chan *types.Briefing, db *db.DB) {
-	FirstName string
+	for b := range ch {
-	LastName  string
+		db.WriteBriefing(b)
-}
+	}
-
-type Instructor Person
-
-type Participant struct {
-	ID int64
-	Person
-	Company string
-}
-
-type Briefing struct {
-	Instructor
-	Date         string
-	Time         string
-	State        string
-	Location     string
-	Participants []Participant
 }
 
 func main() {
 	var i, j int64
-	var b Briefing
 
+	i, j = 1, 1
 	mux := http.NewServeMux()
-	i = 1
+	cb := make(chan *types.Briefing)
+
+	db, err := db.Open("sicherheitsunterweisung")
+	if err != nil {
+		log.Fatalln(err)
+	}
 
 	mux.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static/"))))
-	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+	mux.HandleFunc("/", server.DisplayForm(&i))
-		template.Must(template.ParseFiles("templates/index.html")).Execute(w, i)
+	mux.HandleFunc("/add-participant/", server.AddParticipant(&i))
-	})
+	mux.HandleFunc("/submit/", server.SubmitForm(cb, &i, &j))
-	mux.HandleFunc("/add-participant/", func(w http.ResponseWriter, r *http.Request) {
+
-		i++
+	go writeBriefing(cb, db)
-		template.Must(template.ParseFiles("templates/index.html", "templates/participant.html")).ExecuteTemplate(w, "participant", i)
-	})
-	mux.HandleFunc("/submit/", func(w http.ResponseWriter, r *http.Request) {
-		b.Instructor.FirstName = r.PostFormValue("instructor-first")
-		b.Instructor.LastName = r.PostFormValue("instructor-last")
-		b.Date = r.PostFormValue("date")
-		b.Time = r.PostFormValue("time")
-		b.State = r.PostFormValue("state")
-		b.Location = r.PostFormValue("location")
-		for j = 1; j <= i; j++ {
-			b.Participants = append(b.Participants, Participant{
-				ID: j,
-				Person: Person{
-					FirstName: r.PostFormValue("participant-first-" + fmt.Sprint(j)),
-					LastName:  r.PostFormValue(("participant-last-" + fmt.Sprint(j))),
-				},
-				Company: r.PostFormValue(("participant-company-" + fmt.Sprint(j))),
-			})
-		}
-		fmt.Println(b)
-	})
 
 	log.Fatalln(http.ListenAndServe(":8080", mux))
 }

packages/db/db.go

@@ -0,0 +1,124 @@
+package db
+
+import (
+	"bufio"
+	"database/sql"
+	"fmt"
+	"os"
+	"strings"
+	"syscall"
+
+	"streifling.com/jason/sicherheitsunterweisung/packages/types"
+
+	"github.com/go-sql-driver/mysql"
+	"golang.org/x/term"
+)
+
+type DB struct {
+	*sql.DB
+	Name string
+}
+
+func getCredentials() (string, string, error) {
+	fmt.Printf("DB Benutzer: ")
+	user, err := bufio.NewReader(os.Stdin).ReadString('\n')
+	if err != nil {
+		return "", "", fmt.Errorf("getCredentials: bufio.NewReader(os.Stdin).ReadString('\n'): %v", err)
+	}
+
+	fmt.Printf("DB Passwort: ")
+	bytePass, err := term.ReadPassword(int(syscall.Stdin))
+	if err != nil {
+		return "", "", fmt.Errorf("getCredentials: term.ReadPassword(int(syscall.Stdin)): %v", err)
+	}
+	fmt.Println()
+	pass := string(bytePass)
+
+	return strings.TrimSpace(user), strings.TrimSpace(pass), nil
+}
+
+func Open(dbName string) (*DB, error) {
+	var err error
+	db := new(DB)
+
+	cfg := mysql.NewConfig()
+	cfg.DBName = dbName
+	cfg.User, cfg.Passwd, err = getCredentials()
+	if err != nil {
+		return nil, fmt.Errorf("Open: getCredentials(): %v\n", err)
+	}
+
+	db.Name = dbName
+	db.DB, err = sql.Open("mysql", cfg.FormatDSN())
+	if err != nil {
+		return nil, fmt.Errorf("Open: sql.Open(\"mysql\", cfg.FormatDSN()): %v\n", err)
+	}
+	if err := db.Ping(); err != nil {
+		return nil, fmt.Errorf("Open: db.Ping(): %v\n", err)
+	}
+
+	return db, nil
+}
+
+func (db *DB) WriteBriefing(b *types.Briefing) error {
+	for i := 0; i < len(b.Participants); i++ {
+		result, err := db.Exec("INSERT INTO "+db.Name+" (instructor_first,"+
+			"instructor_last, date, time, state, location, participant_first,"+
+			"participant_last, company) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)",
+			b.FirstName, b.LastName, b.Date, b.Time, b.State, b.Location,
+			b.Participants[i].FirstName, b.Participants[i].LastName,
+			b.Participants[i].Company)
+		if err != nil {
+			return fmt.Errorf("*DB.WriteBriefing: db.Exec(\"INSERT INTO"+
+				"\"+db.Name+\" (instructor_first, instructor_last, date, time, state,"+
+				"location, participant_first, participant_last, company) VALUES (?, ?,"+
+				"?, ?, ?, ?, ?, ?, ?)\", b.FirstName, b.LastName, b.Date, b.Time,"+
+				"b.State, b.Location, b.Participants[i].FirstName,"+
+				"b.Participants[i].LastName, b.Participants[i].Company): %v\n", err)
+		}
+
+		_, err = result.LastInsertId()
+		if err != nil {
+			return fmt.Errorf("*DB.WriteBriefing: result.LastInsertId(): %v\n", err)
+		}
+	}
+
+	return nil
+}
+
+func (db *DB) ReadByName(name string) (*[]types.Briefing, error) {
+	bs := make([]types.Briefing, 0)
+
+	rows, err := db.Query("SELECT *"+
+		" FROM "+db.Name+
+		" WHERE instructor_first LIKE ?"+
+		" OR instructor_last LIKE ?"+
+		" OR participant_first LIKE ?"+
+		" OR participant_last LIKE ?",
+		"%"+name+"%", "%"+name+"%", "%"+name+"%", "%"+name+"%")
+	if err != nil {
+		return nil, fmt.Errorf("*DB.ReadByName: db.Query(\"SELECT *"+
+			" FROM \"+db.Name+"+
+			" WHERE instructor_first LIKE ?"+
+			" OR instructor_last LIKE ?"+
+			" OR participant_first LIKE ?"+
+			" OR participant_last LIKE ?\"): %v\n", err)
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		b := new(types.Briefing)
+		p := new(types.Participant)
+
+		if err := rows.Scan(&p.ID, &b.FirstName, &b.LastName, &b.Date, &b.Time, &b.State,
+			&b.Location, &p.FirstName, &p.LastName, &p.Company); err != nil {
+			return nil, fmt.Errorf("*DB.ReadByName: rows.Scan(&p.ID, &b.FirstName,"+
+				" &b.LastName, &b.Date, &b.Time, &b.State, &b.Location, &p.FirstName,"+
+				" &p.LastName, &p.Company): %v\n", err)
+		}
+		b.Participants = append(b.Participants, *p)
+		bs = append(bs, *b)
+	}
+
+	return &bs, nil
+}

packages/server/server.go

@@ -0,0 +1,49 @@
+package server
+
+import (
+	"fmt"
+	"html/template"
+	"log"
+	"net/http"
+	"streifling.com/jason/sicherheitsunterweisung/packages/types"
+)
+
+func DisplayForm(i *int64) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		template.Must(template.ParseFiles("templates/index.html")).Execute(w, i)
+	}
+}
+
+func AddParticipant(i *int64) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		*i++
+		template.Must(template.ParseFiles("templates/index.html", "templates/participant.html")).ExecuteTemplate(w, "participant", i)
+	}
+}
+
+func SubmitForm(ch chan<- *types.Briefing, i, j *int64) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		b := new(types.Briefing)
+
+		b.FirstName = r.PostFormValue("instructor-first")
+		b.LastName = r.PostFormValue("instructor-last")
+		b.Date = r.PostFormValue("date")
+		b.Time = r.PostFormValue("time")
+		b.State = r.PostFormValue("state")
+		b.Location = r.PostFormValue("location")
+
+		for ; *j <= *i; *j++ {
+			b.Participants = append(b.Participants, types.Participant{
+				ID: *j,
+				Person: types.Person{
+					FirstName: r.PostFormValue("participant-first-" + fmt.Sprint(*j)),
+					LastName:  r.PostFormValue(("participant-last-" + fmt.Sprint(*j))),
+				},
+				Company: r.PostFormValue(("participant-company-" + fmt.Sprint(*j))),
+			})
+		}
+
+		log.Println(b)
+		ch <- b
+	}
+}

packages/types/types.go

@@ -0,0 +1,23 @@
+package types
+
+type Person struct {
+	FirstName string
+	LastName  string
+}
+
+type Instructor Person
+
+type Participant struct {
+	ID int64
+	Person
+	Company string
+}
+
+type Briefing struct {
+	Instructor
+	Date         string
+	Time         string
+	State        string
+	Location     string
+	Participants []Participant
+}