revised the Interfaces.

The Middleware type can now fully used without porblems.

go.mod

@@ -9,7 +9,6 @@ require (
 	github.com/flosch/pongo2/v4 v4.0.2
 	github.com/gin-gonic/gin v1.7.4
 	github.com/go-playground/validator/v10 v10.9.0 // indirect
-	github.com/gofrs/uuid v4.0.0+incompatible // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/uuid v1.2.0
 	github.com/imdario/mergo v0.3.11 // indirect
@@ -23,7 +22,6 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/phuslu/log v1.0.75
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/shopspring/decimal v1.2.0 // indirect
 	github.com/ugorji/go v1.2.6 // indirect
 	golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa // indirect
 	golang.org/x/sys v0.0.0-20211109184856-51b60fd695b3 // indirect

go.sum

@@ -5,6 +5,7 @@ github.com/Masterminds/goutils v1.1.1 h1:5nUrii3FMTL5diU80unEVvNevw1nH4+ZV4DSLVJ
 github.com/Masterminds/goutils v1.1.1/go.mod h1:8cTjp+g8YejhMuvIA5y2vz3BpJxksy863GQaJW2MFNU=
 github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
 github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
+github.com/Masterminds/semver/v3 v3.1.1 h1:hLg3sBzpNErnxhQtUy/mmLR2I9foDujNK030IGemrRc=
 github.com/Masterminds/semver/v3 v3.1.1/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
 github.com/Masterminds/sprig v2.22.0+incompatible h1:z4yfnGrZ7netVz+0EDJ0Wi+5VZCSYp4Z0m2dk6cEM60=
 github.com/Masterminds/sprig v2.22.0+incompatible/go.mod h1:y6hNFY5UBTIWBxnzTeuNhlNS5hqE0NB0E6fgfo2Br3o=
@@ -112,7 +113,6 @@ github.com/jackc/pgconn v1.4.0/go.mod h1:Y2O3ZDF0q4mMacyWV3AstPJpeHXWGEetiFttmq5
 github.com/jackc/pgconn v1.5.0/go.mod h1:QeD3lBfpTFe8WUnPZWN5KY/mB8FGMIYRdd8P8Jr0fAI=
 github.com/jackc/pgconn v1.5.1-0.20200601181101-fa742c524853/go.mod h1:QeD3lBfpTFe8WUnPZWN5KY/mB8FGMIYRdd8P8Jr0fAI=
 github.com/jackc/pgconn v1.6.1/go.mod h1:g8mKMqmSUO6AzAvha7vy07g1rbGOlc7iF0nU0ei83hc=
-github.com/jackc/pgconn v1.8.0 h1:FmjZ0rOyXTr1wfWs45i4a9vjnjWUAGpMuQLD9OSs+lw=
 github.com/jackc/pgconn v1.8.0/go.mod h1:1C2Pb36bGIP9QHGBYCjnyhqu7Rv3sGshaQUvmfGIB/o=
 github.com/jackc/pgconn v1.9.0/go.mod h1:YctiPyvzfU11JFxoXokUOOKQXQmDMoJL9vJzHH8/2JY=
 github.com/jackc/pgconn v1.9.1-0.20210724152538-d89c8390a530/go.mod h1:4z2w8XhRbP1hYxkpTuBjTS3ne3J48K83+u0zoyvg2pI=
@@ -122,7 +122,6 @@ github.com/jackc/pgerrcode v0.0.0-20190803225404-afa3381909a6/go.mod h1:a/s9Lp5W
 github.com/jackc/pgio v1.0.0 h1:g12B9UwVnzGhueNavwioyEEpAmqMe1E/BN9ES+8ovkE=
 github.com/jackc/pgio v1.0.0/go.mod h1:oP+2QK2wFfUWgr+gxjoBH9KGBb31Eio69xUb0w5bYf8=
 github.com/jackc/pgmock v0.0.0-20190831213851-13a1b77aafa2/go.mod h1:fGZlG77KXmcq05nJLRkk0+p82V8B8Dw8KN2/V9c/OAE=
-github.com/jackc/pgmock v0.0.0-20201204152224-4fe30f7445fd h1:eDErF6V/JPJON/B7s68BxwHgfmyOntHJQ8IOaz0x4R8=
 github.com/jackc/pgmock v0.0.0-20201204152224-4fe30f7445fd/go.mod h1:hrBW0Enj2AZTNpt/7Y5rr2xe/9Mn757Wtb2xeBzPv2c=
 github.com/jackc/pgmock v0.0.0-20210724152146-4ad1a8207f65 h1:DadwsjnMwFjfWc9y5Wi/+Zz7xoE5ALHsRQlOctkOiHc=
 github.com/jackc/pgmock v0.0.0-20210724152146-4ad1a8207f65/go.mod h1:5R2h2EEX+qri8jOWMbJCtaPWkrrNc7OHwsp2TCqp7ak=
@@ -137,8 +136,6 @@ github.com/jackc/pgproto3/v2 v2.0.0-rc3.0.20190831210041-4c03ce451f29/go.mod h1:
 github.com/jackc/pgproto3/v2 v2.0.1/go.mod h1:WfJCnwN3HIg9Ish/j3sgWXnAfK8A9Y0bwXYU5xKaEdA=
 github.com/jackc/pgproto3/v2 v2.0.2/go.mod h1:WfJCnwN3HIg9Ish/j3sgWXnAfK8A9Y0bwXYU5xKaEdA=
 github.com/jackc/pgproto3/v2 v2.0.6/go.mod h1:WfJCnwN3HIg9Ish/j3sgWXnAfK8A9Y0bwXYU5xKaEdA=
-github.com/jackc/pgproto3/v2 v2.0.7 h1:6Pwi1b3QdY65cuv6SyVO0FgPd5J3Bl7wf/nQQjinHMA=
-github.com/jackc/pgproto3/v2 v2.0.7/go.mod h1:WfJCnwN3HIg9Ish/j3sgWXnAfK8A9Y0bwXYU5xKaEdA=
 github.com/jackc/pgproto3/v2 v2.1.1 h1:7PQ/4gLoqnl87ZxL7xjO0DR5gYuviDCZxQJsUlFW1eI=
 github.com/jackc/pgproto3/v2 v2.1.1/go.mod h1:WfJCnwN3HIg9Ish/j3sgWXnAfK8A9Y0bwXYU5xKaEdA=
 github.com/jackc/pgservicefile v0.0.0-20200307190119-3430c5407db8/go.mod h1:vsD4gTJCa9TptPL8sPkXrLZ+hDuNrZCnj29CQpr4X1E=
@@ -151,8 +148,6 @@ github.com/jackc/pgtype v1.2.0/go.mod h1:5m2OfMh1wTK7x+Fk952IDmI4nw3nPrvtQdM0ZT4
 github.com/jackc/pgtype v1.3.1-0.20200510190516-8cd94a14c75a/go.mod h1:vaogEUkALtxZMCH411K+tKzNpwzCKU+AnPzBKZ+I+Po=
 github.com/jackc/pgtype v1.3.1-0.20200606141011-f6355165a91c/go.mod h1:cvk9Bgu/VzJ9/lxTO5R5sf80p0DiucVtN7ZxvaC4GmQ=
 github.com/jackc/pgtype v1.4.0/go.mod h1:JCULISAZBFGrHaOXIIFiyfzW5VY0GRitRr8NeJsrdig=
-github.com/jackc/pgtype v1.6.2 h1:b3pDeuhbbzBYcg5kwNmNDun4pFUD/0AAr1kLXZLeNt8=
-github.com/jackc/pgtype v1.6.2/go.mod h1:JCULISAZBFGrHaOXIIFiyfzW5VY0GRitRr8NeJsrdig=
 github.com/jackc/pgtype v1.8.1-0.20210724151600-32e20a603178/go.mod h1:C516IlIV9NKqfsMCXTdChteoXmwgUceqaLfjg2e3NlM=
 github.com/jackc/pgtype v1.8.1 h1:9k0IXtdJXHJbyAWQgbWr1lU+MEhPXZz6RIXxfR5oxXs=
 github.com/jackc/pgtype v1.8.1/go.mod h1:LUMuVrfsFfdKGLw+AFFVv6KtHOFMwRgDDzBt76IqCA4=
@@ -163,8 +158,6 @@ github.com/jackc/pgx/v4 v4.5.0/go.mod h1:EpAKPLdnTorwmPUUsqrPxy5fphV18j9q3wrfRXg
 github.com/jackc/pgx/v4 v4.6.1-0.20200510190926-94ba730bb1e9/go.mod h1:t3/cdRQl6fOLDxqtlyhe9UWgfIi9R8+8v8GKV5TRA/o=
 github.com/jackc/pgx/v4 v4.6.1-0.20200606145419-4e5062306904/go.mod h1:ZDaNWkt9sW1JMiNn0kdYBaLelIhw7Pg4qd+Vk6tw7Hg=
 github.com/jackc/pgx/v4 v4.7.1/go.mod h1:nu42q3aPjuC1M0Nak4bnoprKlXPINqopEKqbq5AZSC4=
-github.com/jackc/pgx/v4 v4.10.1 h1:/6Q3ye4myIj6AaplUm+eRcz4OhK9HAvFf4ePsG40LJY=
-github.com/jackc/pgx/v4 v4.10.1/go.mod h1:QlrWebbs3kqEZPHCTGyxecvzG6tvIsYu+A5b1raylkA=
 github.com/jackc/pgx/v4 v4.12.1-0.20210724153913-640aa07df17c/go.mod h1:1QD0+tgSXP7iUjYm9C1NxKhny7lq6ee99u/z+IHFcgs=
 github.com/jackc/pgx/v4 v4.13.0 h1:JCjhT5vmhMAf/YwBHLvrBn4OGdIQBiFG6ym8Zmdx570=
 github.com/jackc/pgx/v4 v4.13.0/go.mod h1:9P4X524sErlaxj0XSGZk7s+LD0eOyu1ZDUrrpznYDF0=
@@ -206,8 +199,7 @@ github.com/lib/pq v1.0.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.1.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.3.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
-github.com/lib/pq v1.9.0 h1:L8nSXQQzAYByakOFMTwpjRoHsMJklur4Gi59b6VivR8=
+github.com/lib/pq v1.10.2 h1:AqzbZs4ZoCBp+GtejcpCpcxM3zlSMx29dXbUSeVtJb8=
-github.com/lib/pq v1.9.0/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lib/pq v1.10.2/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/mattermost/xml-roundtrip-validator v0.0.0-20201213122252-bcd7e1b9601e/go.mod h1:qccnGMcpgwcNaBnxqpJpWWUiPNr5H3O8eDgGV9gT5To=
@@ -336,8 +328,6 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20201203163018-be400aefbc4c/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
 golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 h1:7I4JAnoQBe7ZtJcBaYHi5UtiO8tQHbUSXxL+pnGRANg=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa h1:idItI2DDfCokpg0N51B2VtiLdJ4vAuXC9fnCb2gACo4=
 golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
@@ -378,8 +368,6 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211106132015-ebca88c72f68 h1:Ywe/f3fNleF8I6F6qv3MeFoSZ6CTf2zBMMa/7qVML8M=
-golang.org/x/sys v0.0.0-20211106132015-ebca88c72f68/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211109184856-51b60fd695b3 h1:T6tyxxvHMj2L1R2kZg0uNMpS8ZhB9lRa9XRGTCSA65w=
 golang.org/x/sys v0.0.0-20211109184856-51b60fd695b3/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=

http.go

@@ -14,6 +14,7 @@ import (
 	"go.sebtobie.de/httpserver/constants"
 	"go.sebtobie.de/httpserver/funcs"
 	"go.sebtobie.de/httpserver/menus"
+	"go.sebtobie.de/httpserver/middleware"
 	"go.sebtobie.de/httpserver/templates"
 )
 
@@ -32,6 +33,7 @@ type Config struct {
 	Certfile   string
 	Keyfile    string
 	Sites      map[string]SiteConfig
+	Middleware map[string]middleware.Config
 }
 
 /**
@@ -61,6 +63,7 @@ type Server struct {
 	setup           bool
 	authh           auth.AuthenticationHandler
 	middleware      gin.HandlersChain
+	advmiddleware   map[string]middleware.Middleware
 }
 
 // CreateServer creates an server that can be run in a coroutine.
@@ -242,6 +245,12 @@ func (s *Server) Setup() {
 		}
 		group := router.Group(config["path"].(string))
 		site.Init(group)
+	}
+	for _, middleware := range s.advmiddleware {
+		middleware.Sites(maptoarray(s.sites))
+	}
+	for cfg, site = range s.sites {
+		config := s.Conf.Sites[cfg]
 		if ms, ok := site.(menus.MenuSite); ok {
 			menus := ms.Menu(config["domain"].(string))
 			log.Debug().Msgf("%d menus are added", len(menus))
@@ -251,9 +260,10 @@ func (s *Server) Setup() {
 			templates := ts.Templates()
 			if templates == nil {
 				log.Error().Msgf("Site %s had an empty templateloader", cfg)
-			}
+			} else {
 				s.template.AddLoader(templates)
 			}
+		}
 		site.Setup(config)
 	}
 	s.setup = true
@@ -272,3 +282,12 @@ func (s *Server) RegisterSite(cfg string, site Site) {
 	s.Conf.Sites[cfg] = config
 	s.sites[cfg] = site
 }
+
+// RegisterMiddleware registers middleware that has avanced functions, like persistence.
+// That middleware allows configuration with the Setup Method and the Teardown allows an safe method for closing connections and shutting down.
+// Middleware will be set up before sites.
+func (s *Server) RegisterMiddleware(cfg string, m middleware.Middleware) {
+	s.Conf.Middleware[cfg] = m.Defaults()
+	s.Use(m.Gin)
+	s.advmiddleware[cfg] = m
+}

middleware/db/db.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"context"
+	"fmt"
 	"io/fs"
 	"sync"
 
@@ -100,6 +101,24 @@ func (m *Middleware) Gin(c *gin.Context) {
 	c.Set(ContextKey, m.GetConn)
 }
 
+// Setup adds the connections from the configfile into the middleware
+func (m *Middleware) Setup(mc middleware.Config) {
+	for key, value := range mc {
+		dsn := value.(string)
+		err := m.AddDB(key, dsn)
+		if err != nil {
+			log.Error().Err(err).Msg("Failed to parse the config")
+		}
+	}
+}
+
+// Defaults returns an default config for connections
+func (*Middleware) Defaults() middleware.Config {
+	return map[string]interface{}{
+		"default": "host=/run/postgresql port=5432 dbname=httpserver",
+	}
+}
+
 // Teardown closes the DBConnection
 func (m *Middleware) Teardown() {
 	for name, pool := range m.databases {
@@ -109,11 +128,49 @@ func (m *Middleware) Teardown() {
 	}
 }
 
-func logmigrations(version int32, name string, dir string, sql string) {
+// Sites is an function for getting the migrations of the site
-	sql = ""
+func (m *Middleware) Sites(sites []interface{}) (err error) {
+	m.lock.Lock()
+	defer m.lock.Unlock()
+	var (
+		conn *pgxpool.Conn
+		mig  *migrate.Migrator
+		db   *pgxpool.Pool
+	)
+	for _, s := range sites {
+		site, ok := s.(MigrationSite)
+		if !ok {
+			continue
+		}
+		db, ok = m.databases[site.Database()]
+		if !ok {
+			return fmt.Errorf("Failed to get the database. The Databasepool %s does not exist", site.Database())
+		}
+		conn, err = db.Acquire(context.TODO())
+		if err != nil {
+			return
+		}
+		defer conn.Release()
+		mig, err = site.Migrations(conn.Conn())
+		err = mig.Migrate(context.TODO())
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+func logmigrations(version int32, name, dir string, sql string) {
 	log.Info().Int32("version", version).Str("name", name).Str("dir", dir).Msgf("Running Migration %s with version %d in %sward direction", name, version, dir)
 }
 
+// MigrationSite is an interface for Sites that use an database.
+// this enables sites to provide database migrations.
+type MigrationSite interface {
+	Database() string
+	Migrations(*pgx.Conn) (*migrate.Migrator, error)
+}
+
 // SetupMigrator sets up the migrator to migrate the database.
 func SetupMigrator(prefix string, connection *pgx.Conn, migrations fs.FS) (mig *migrate.Migrator, err error) {
 	mig, err = migrate.NewMigratorEx(

middleware/middleware.go

@@ -54,8 +54,14 @@ func RequireUser(c *gin.Context) {
 	}
 }
 
+// Config is the type For Configuration of the Middleware
+type Config map[string]interface{}
+
 // Middleware is an type to Save data between executions and to provide help at the teardown.
 type Middleware interface {
 	Gin(*gin.Context)
+	Defaults() Config
+	Setup(Config)
 	Teardown()
+	Sites([]interface{}) error
 }