From 8d71a7cf19dc3e36c0d9ac5a789ae647896859af Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Fri, 4 Dec 2015 03:01:18 +0100
Subject: fetching of user passwords works now


diff --git a/conf.go b/conf.go
index d482588..6dcbe84 100644
--- a/conf.go
+++ b/conf.go
@@ -25,6 +25,9 @@
 package rhimport
 
 import (
+	"database/sql"
+	"fmt"
+	_ "github.com/go-sql-driver/mysql"
 	"github.com/vaughan0/go-ini"
 )
 
@@ -40,17 +43,18 @@ type getPasswordRequest struct {
 }
 
 type Config struct {
-	configfile      string
-	RDXportEndpoint string
-	db_host         string
-	db_user         string
-	db_passwd       string
-	db_db           string
-	// TODO: reference to sql connection
-	password_cache  map[string]string
-	getPasswordChan chan getPasswordRequest
-	quit            chan bool
-	done            chan bool
+	configfile        string
+	RDXportEndpoint   string
+	db_host           string
+	db_user           string
+	db_passwd         string
+	db_db             string
+	dbh               *sql.DB
+	password_cache    map[string]string
+	getPasswordChan   chan getPasswordRequest
+	dbGetPasswordStmt *sql.Stmt
+	quit              chan bool
+	done              chan bool
 }
 
 func get_ini_value(file ini.File, section string, key string, dflt string) string {
@@ -74,9 +78,35 @@ func (self *Config) read_config_file() error {
 	return nil
 }
 
+func (self *Config) init_database() (err error) {
+	dsn := fmt.Sprintf("%s:%s@tcp(%s:3306)/%s", self.db_user, self.db_passwd, self.db_host, self.db_db)
+	if self.dbh, err = sql.Open("mysql", dsn); err != nil {
+		return
+	}
+	if self.dbGetPasswordStmt, err = self.dbh.Prepare("select PASSWORD from USERS where LOGIN_NAME = ?"); err != nil {
+		return
+	}
+
+	return
+}
+
 func (self *Config) getPassword(username string, cached bool) (pwd string, err error) {
-	//TODO: actually fetch password from cache or DB
-	pwd = "12345"
+
+	if cached {
+		pwd = self.password_cache[username]
+	}
+
+	if pwd == "" {
+		err = self.dbGetPasswordStmt.QueryRow(username).Scan(&pwd)
+		if err != nil {
+			if err == sql.ErrNoRows {
+				err = fmt.Errorf("user '%s' not known by rivendell", username)
+			}
+			return
+		}
+		self.password_cache[username] = pwd
+	}
+
 	return
 }
 
@@ -104,14 +134,18 @@ func (self *Config) Cleanup() {
 	close(self.quit)
 	close(self.done)
 	close(self.getPasswordChan)
-	//TODO : close db connection
+	if self.dbh != nil {
+		self.dbh.Close()
+	}
+	if self.dbGetPasswordStmt != nil {
+		self.dbGetPasswordStmt.Close()
+	}
 }
 
 func NewConfig(configfile, rdxport_endpoint *string) (conf *Config, err error) {
 	conf = new(Config)
 	conf.configfile = *configfile
-	err = conf.read_config_file()
-	if err != nil {
+	if err = conf.read_config_file(); err != nil {
 		return
 	}
 	conf.quit = make(chan bool)
@@ -120,7 +154,9 @@ func NewConfig(configfile, rdxport_endpoint *string) (conf *Config, err error) {
 	conf.password_cache = make(map[string]string)
 	conf.getPasswordChan = make(chan getPasswordRequest)
 
-	//TODO : init db connection
+	if err = conf.init_database(); err != nil {
+		return
+	}
 
 	go conf.dispatchRequests()
 	return
-- 
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