Added initial support for MySQL databases

cmd/data/db.go

@@ -0,0 +1,34 @@
+package data
+
+import (
+	"database/sql"
+	"fmt"
+
+	"github.com/go-sql-driver/mysql"
+)
+
+type DB struct {
+	*sql.DB
+}
+
+func OpenDB(dbName string) (*DB, error) {
+	var err error
+	db := DB{DB: &sql.DB{}}
+
+	cfg := mysql.NewConfig()
+	cfg.DBName = dbName
+	cfg.User, cfg.Passwd, err = getCredentials()
+	if err != nil {
+		return nil, fmt.Errorf("error: user credentials for DB could not be read: %v", err)
+	}
+
+	db.DB, err = sql.Open("mysql", cfg.FormatDSN())
+	if err != nil {
+		return nil, fmt.Errorf("error: DB could not be opened: %v", err)
+	}
+	if err = db.Ping(); err != nil {
+		return nil, fmt.Errorf("error: DB could not be reached: %v", err)
+	}
+
+	return &db, nil
+}

cmd/data/helpers.go

@@ -0,0 +1,52 @@
+package data
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+	"syscall"
+
+	"golang.org/x/term"
+)
+
+func getUsername() (string, error) {
+	user := os.Getenv("DB_USER")
+	if user == "" {
+		var err error
+		fmt.Printf("DB Benutzer: ")
+		user, err = bufio.NewReader(os.Stdin).ReadString('\n')
+		if err != nil {
+			return fmt.Errorf("error: cmd/data/helpers.go getUsername bufio.NewReader().ReadString(): %v", err)
+		}
+	}
+	return strings.TrimSpace(user), nil
+}
+
+func getPassword() (string, error) {
+	pass := os.Getenv("DB_PASS")
+	if pass == "" {
+		fmt.Printf("DB Passwort: ")
+		bytePass, err := term.ReadPassword(int(syscall.Stdin))
+		if err != nil {
+			return fmt.Errorf("error: cmd/data/helpers.go getPassword term.ReadPassword(): %v", err)
+		}
+		fmt.Println()
+		pass = strings.TrimSpace(string(bytePass))
+	}
+	return pass, nil
+}
+
+func getCredentials() (string, string, error) {
+	user, err := getUsername()
+	if err != nil {
+		return "", "", fmt.Errorf("error: cmd/data/helpers.go getCredentials getUsername(): %v", err)
+	}
+
+	pass, err := getPassword()
+	if err != nil {
+		return "", "", fmt.Errorf("error: cmd/data/helpers.go getCredentials getPassword(): %v", err)
+	}
+
+	return user, pass, nil
+}

go.mod

@@ -3,6 +3,10 @@ module streifling.com/jason/cpolis
 go 1.22.0
 
 require (
+	github.com/go-sql-driver/mysql v1.7.1
 	github.com/gorilla/feeds v1.1.2
 	github.com/yuin/goldmark v1.7.0
+	golang.org/x/term v0.17.0
 )
+
+require golang.org/x/sys v0.17.0 // indirect

go.sum

@@ -1,3 +1,5 @@
+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=
 github.com/gorilla/feeds v1.1.2 h1:pxzZ5PD3RJdhFH2FsJJ4x6PqMqbgFk1+Vez4XWBW8Iw=
 github.com/gorilla/feeds v1.1.2/go.mod h1:WMib8uJP3BbY+X8Szd1rA5Pzhdfh+HCCAYT2z7Fza6Y=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
@@ -8,3 +10,7 @@ github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZV
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/yuin/goldmark v1.7.0 h1:EfOIvIMZIzHdB/R/zVrikYLPPwJlfMcNczJFMs1m6sA=
 github.com/yuin/goldmark v1.7.0/go.mod h1:uzxRWxtg69N339t3louHJ7+O03ezfj6PlliRlaOzY1E=
+golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
+golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.17.0 h1:mkTF7LCd6WGJNL3K1Ad7kwxNfYAW6a8a8QqtMblp/4U=
+golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=

main.go

@@ -5,11 +5,17 @@ import (
 	"log"
 	"net/http"
 
+	"streifling.com/jason/cpolis/cmd/data"
 	"streifling.com/jason/cpolis/cmd/feed"
 	"streifling.com/jason/cpolis/cmd/handlers"
 )
 
 func main() {
+	db, err := data.OpenDB("cpolis")
+	if err != nil {
+		log.Fatalln(err)
+	}
+
 	f, err := feed.OpenFeed("tmp/rss.gob")
 	if err != nil {
 		log.Println(err)