Merge pull request #699 from mattermost/PLT-92

PLT-92 Adding server side versioning to the binary

8 files changed, 231 insertions, 11 deletions

diff --git a/store/sql_channel_store.go b/store/sql_channel_store.go
index 3d1007874..bad878501 100644
--- a/store/sql_channel_store.go
+++ b/store/sql_channel_store.go
@@ -37,7 +37,6 @@ func NewSqlChannelStore(sqlStore *SqlStore) ChannelStore {
 }
 
 func (s SqlChannelStore) UpgradeSchemaIfNeeded() {
-	s.CreateColumnIfNotExists("Channels", "CreatorId", "varchar(26)", "character varying(26)", "")
 }
 
 func (s SqlChannelStore) CreateIndexesIfNotExists() {
diff --git a/store/sql_post_store.go b/store/sql_post_store.go
index 20de23eb7..21e8e9d00 100644
--- a/store/sql_post_store.go
+++ b/store/sql_post_store.go
@@ -196,9 +196,9 @@ func (s SqlPostStore) GetEtag(channelId string) StoreChannel {
 		var et etagPosts
 		err := s.GetReplica().SelectOne(&et, "SELECT Id, UpdateAt FROM Posts WHERE ChannelId = :ChannelId ORDER BY UpdateAt DESC LIMIT 1", map[string]interface{}{"ChannelId": channelId})
 		if err != nil {
-			result.Data = fmt.Sprintf("%v.0.%v", model.ETAG_ROOT_VERSION, model.GetMillis())
+			result.Data = fmt.Sprintf("%v.0.%v", model.CurrentVersion, model.GetMillis())
 		} else {
-			result.Data = fmt.Sprintf("%v.%v.%v", model.ETAG_ROOT_VERSION, et.Id, et.UpdateAt)
+			result.Data = fmt.Sprintf("%v.%v.%v", model.CurrentVersion, et.Id, et.UpdateAt)
 		}
 
 		storeChannel <- result
diff --git a/store/sql_post_store_test.go b/store/sql_post_store_test.go
index d48dea51c..bc1cb2c2c 100644
--- a/store/sql_post_store_test.go
+++ b/store/sql_post_store_test.go
@@ -37,14 +37,14 @@ func TestPostStoreGet(t *testing.T) {
 	o1.Message = "a" + model.NewId() + "b"
 
 	etag1 := (<-store.Post().GetEtag(o1.ChannelId)).Data.(string)
-	if strings.Index(etag1, model.ETAG_ROOT_VERSION+".0.") != 0 {
+	if strings.Index(etag1, model.CurrentVersion+".0.") != 0 {
 		t.Fatal("Invalid Etag")
 	}
 
 	o1 = (<-store.Post().Save(o1)).Data.(*model.Post)
 
 	etag2 := (<-store.Post().GetEtag(o1.ChannelId)).Data.(string)
-	if strings.Index(etag2, model.ETAG_ROOT_VERSION+"."+o1.Id) != 0 {
+	if strings.Index(etag2, model.CurrentVersion+"."+o1.Id) != 0 {
 		t.Fatal("Invalid Etag")
 	}
 
@@ -136,7 +136,7 @@ func TestPostStoreDelete(t *testing.T) {
 	o1.Message = "a" + model.NewId() + "b"
 
 	etag1 := (<-store.Post().GetEtag(o1.ChannelId)).Data.(string)
-	if strings.Index(etag1, model.ETAG_ROOT_VERSION+".0.") != 0 {
+	if strings.Index(etag1, model.CurrentVersion+".0.") != 0 {
 		t.Fatal("Invalid Etag")
 	}
 
@@ -160,7 +160,7 @@ func TestPostStoreDelete(t *testing.T) {
 	}
 
 	etag2 := (<-store.Post().GetEtag(o1.ChannelId)).Data.(string)
-	if strings.Index(etag2, model.ETAG_ROOT_VERSION+"."+o1.Id) != 0 {
+	if strings.Index(etag2, model.CurrentVersion+"."+o1.Id) != 0 {
 		t.Fatal("Invalid Etag")
 	}
 }
diff --git a/store/sql_store.go b/store/sql_store.go
index cf6fae6d4..2f7ac2805 100644
--- a/store/sql_store.go
+++ b/store/sql_store.go
@@ -39,6 +39,7 @@ type SqlStore struct {
 	audit    AuditStore
 	session  SessionStore
 	oauth    OAuthStore
+	system   SystemStore
 }
 
 func NewSqlStore() Store {
@@ -56,9 +57,30 @@ func NewSqlStore() Store {
 			utils.Cfg.SqlSettings.Trace)
 	}
 
+	schemaVersion := sqlStore.GetCurrentSchemaVersion()
+
+	// If the version is already set then we are potentially in an 'upgrade needed' state
+	if schemaVersion != "" {
+		// Check to see if it's the most current database schema version
+		if !model.IsCurrentVersion(schemaVersion) {
+			// If we are upgrading from the previous version then print a warning and continue
+			if model.IsPreviousVersion(schemaVersion) {
+				l4g.Warn("The database schema version of " + schemaVersion + " appears to be out of date")
+				l4g.Warn("Attempting to upgrade the database schema version to " + model.CurrentVersion)
+			} else {
+				// If this is an 'upgrade needed' state but the user is attempting to skip a version then halt the world
+				l4g.Critical("The database schema version of " + schemaVersion + " cannot be upgraded.  You must not skip a version.")
+				time.Sleep(time.Second)
+				panic("The database schema version of " + schemaVersion + " cannot be upgraded.  You must not skip a version.")
+			}
+		}
+	}
+
 	// Temporary upgrade code, remove after 0.8.0 release
-	if sqlStore.DoesColumnExist("Sessions", "AltId") {
-		sqlStore.GetMaster().Exec("DROP TABLE IF EXISTS Sessions")
+	if sqlStore.DoesTableExist("Sessions") {
+		if sqlStore.DoesColumnExist("Sessions", "AltId") {
+			sqlStore.GetMaster().Exec("DROP TABLE IF EXISTS Sessions")
+		}
 	}
 
 	sqlStore.team = NewSqlTeamStore(sqlStore)
@@ -68,6 +90,7 @@ func NewSqlStore() Store {
 	sqlStore.audit = NewSqlAuditStore(sqlStore)
 	sqlStore.session = NewSqlSessionStore(sqlStore)
 	sqlStore.oauth = NewSqlOAuthStore(sqlStore)
+	sqlStore.system = NewSqlSystemStore(sqlStore)
 
 	sqlStore.master.CreateTablesIfNotExists()
 
@@ -78,6 +101,7 @@ func NewSqlStore() Store {
 	sqlStore.audit.(*SqlAuditStore).UpgradeSchemaIfNeeded()
 	sqlStore.session.(*SqlSessionStore).UpgradeSchemaIfNeeded()
 	sqlStore.oauth.(*SqlOAuthStore).UpgradeSchemaIfNeeded()
+	sqlStore.system.(*SqlSystemStore).UpgradeSchemaIfNeeded()
 
 	sqlStore.team.(*SqlTeamStore).CreateIndexesIfNotExists()
 	sqlStore.channel.(*SqlChannelStore).CreateIndexesIfNotExists()
@@ -86,6 +110,17 @@ func NewSqlStore() Store {
 	sqlStore.audit.(*SqlAuditStore).CreateIndexesIfNotExists()
 	sqlStore.session.(*SqlSessionStore).CreateIndexesIfNotExists()
 	sqlStore.oauth.(*SqlOAuthStore).CreateIndexesIfNotExists()
+	sqlStore.system.(*SqlSystemStore).CreateIndexesIfNotExists()
+
+	if model.IsPreviousVersion(schemaVersion) {
+		sqlStore.system.Update(&model.System{Name: "Version", Value: model.CurrentVersion})
+		l4g.Warn("The database schema has been upgraded to version " + model.CurrentVersion)
+	}
+
+	if schemaVersion == "" {
+		sqlStore.system.Save(&model.System{Name: "Version", Value: model.CurrentVersion})
+		l4g.Info("The database schema has been set to version " + model.CurrentVersion)
+	}
 
 	return sqlStore
 }
@@ -131,6 +166,56 @@ func setupConnection(con_type string, driver string, dataSource string, maxIdle
 	return dbmap
 }
 
+func (ss SqlStore) GetCurrentSchemaVersion() string {
+	version, _ := ss.GetMaster().SelectStr("SELECT Value FROM Systems WHERE Name='Version'")
+	return version
+}
+
+func (ss SqlStore) DoesTableExist(tableName string) bool {
+	if utils.Cfg.SqlSettings.DriverName == "postgres" {
+		count, err := ss.GetMaster().SelectInt(
+			`SELECT count(relname) FROM pg_class WHERE relname=$1`,
+			strings.ToLower(tableName),
+		)
+
+		if err != nil {
+			l4g.Critical("Failed to check if table exists %v", err)
+			time.Sleep(time.Second)
+			panic("Failed to check if table exists " + err.Error())
+		}
+
+		return count > 0
+
+	} else if utils.Cfg.SqlSettings.DriverName == "mysql" {
+
+		count, err := ss.GetMaster().SelectInt(
+			`SELECT
+		    COUNT(0) AS table_exists
+			FROM
+			    information_schema.TABLES
+			WHERE
+			    TABLE_SCHEMA = DATABASE()
+			        AND TABLE_NAME = ?
+		    `,
+			tableName,
+		)
+
+		if err != nil {
+			l4g.Critical("Failed to check if table exists %v", err)
+			time.Sleep(time.Second)
+			panic("Failed to check if table exists " + err.Error())
+		}
+
+		return count > 0
+
+	} else {
+		l4g.Critical("Failed to check if column exists because of missing driver")
+		time.Sleep(time.Second)
+		panic("Failed to check if column exists because of missing driver")
+	}
+
+}
+
 func (ss SqlStore) DoesColumnExist(tableName string, columnName string) bool {
 	if utils.Cfg.SqlSettings.DriverName == "postgres" {
 		count, err := ss.GetMaster().SelectInt(
@@ -380,6 +465,10 @@ func (ss SqlStore) OAuth() OAuthStore {
 	return ss.oauth
 }
 
+func (ss SqlStore) System() SystemStore {
+	return ss.system
+}
+
 type mattermConverter struct{}
 
 func (me mattermConverter) ToDb(val interface{}) (interface{}, error) {
diff --git a/store/sql_system_store.go b/store/sql_system_store.go
new file mode 100644
index 000000000..ca22de2a6
--- /dev/null
+++ b/store/sql_system_store.go
@@ -0,0 +1,92 @@
+// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package store
+
+import (
+	"github.com/mattermost/platform/model"
+)
+
+type SqlSystemStore struct {
+	*SqlStore
+}
+
+func NewSqlSystemStore(sqlStore *SqlStore) SystemStore {
+	s := &SqlSystemStore{sqlStore}
+
+	for _, db := range sqlStore.GetAllConns() {
+		table := db.AddTableWithName(model.System{}, "Systems").SetKeys(false, "Name")
+		table.ColMap("Name").SetMaxSize(64)
+		table.ColMap("Value").SetMaxSize(1024)
+	}
+
+	return s
+}
+
+func (s SqlSystemStore) UpgradeSchemaIfNeeded() {
+}
+
+func (s SqlSystemStore) CreateIndexesIfNotExists() {
+}
+
+func (s SqlSystemStore) Save(system *model.System) StoreChannel {
+
+	storeChannel := make(StoreChannel)
+
+	go func() {
+		result := StoreResult{}
+
+		if err := s.GetMaster().Insert(system); err != nil {
+			result.Err = model.NewAppError("SqlSystemStore.Save", "We encounted an error saving the system property", "")
+		}
+
+		storeChannel <- result
+		close(storeChannel)
+	}()
+
+	return storeChannel
+}
+
+func (s SqlSystemStore) Update(system *model.System) StoreChannel {
+
+	storeChannel := make(StoreChannel)
+
+	go func() {
+		result := StoreResult{}
+
+		if _, err := s.GetMaster().Update(system); err != nil {
+			result.Err = model.NewAppError("SqlSystemStore.Save", "We encounted an error updating the system property", "")
+		}
+
+		storeChannel <- result
+		close(storeChannel)
+	}()
+
+	return storeChannel
+}
+
+func (s SqlSystemStore) Get() StoreChannel {
+
+	storeChannel := make(StoreChannel)
+
+	go func() {
+		result := StoreResult{}
+
+		var systems []model.System
+		props := make(model.StringMap)
+		if _, err := s.GetReplica().Select(&systems, "SELECT * FROM Systems"); err != nil {
+			result.Err = model.NewAppError("SqlSystemStore.Get", "We encounted an error finding the system properties", "")
+		} else {
+			for _, prop := range systems {
+				props[prop.Name] = prop.Value
+			}
+
+			result.Data = props
+		}
+
+		storeChannel <- result
+		close(storeChannel)
+	}()
+
+	return storeChannel
+}
diff --git a/store/sql_system_store_test.go b/store/sql_system_store_test.go
new file mode 100644
index 000000000..0f03b8f0e
--- /dev/null
+++ b/store/sql_system_store_test.go
@@ -0,0 +1,33 @@
+// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package store
+
+import (
+	"github.com/mattermost/platform/model"
+	"testing"
+)
+
+func TestSqlSystemStore(t *testing.T) {
+	Setup()
+
+	system := &model.System{Name: model.NewId(), Value: "value"}
+	Must(store.System().Save(system))
+
+	result := <-store.System().Get()
+	systems := result.Data.(model.StringMap)
+
+	if systems[system.Name] != system.Value {
+		t.Fatal()
+	}
+
+	system.Value = "value2"
+	Must(store.System().Update(system))
+
+	result2 := <-store.System().Get()
+	systems2 := result2.Data.(model.StringMap)
+
+	if systems2[system.Name] != system.Value {
+		t.Fatal()
+	}
+}
diff --git a/store/sql_user_store.go b/store/sql_user_store.go
index 52d670d56..778df367e 100644
--- a/store/sql_user_store.go
+++ b/store/sql_user_store.go
@@ -325,9 +325,9 @@ func (s SqlUserStore) GetEtagForProfiles(teamId string) StoreChannel {
 
 		updateAt, err := s.GetReplica().SelectInt("SELECT UpdateAt FROM Users WHERE TeamId = :TeamId ORDER BY UpdateAt DESC LIMIT 1", map[string]interface{}{"TeamId": teamId})
 		if err != nil {
-			result.Data = fmt.Sprintf("%v.%v", model.ETAG_ROOT_VERSION, model.GetMillis())
+			result.Data = fmt.Sprintf("%v.%v", model.CurrentVersion, model.GetMillis())
 		} else {
-			result.Data = fmt.Sprintf("%v.%v", model.ETAG_ROOT_VERSION, updateAt)
+			result.Data = fmt.Sprintf("%v.%v", model.CurrentVersion, updateAt)
 		}
 
 		storeChannel <- result
diff --git a/store/store.go b/store/store.go
index 0218bc757..1344c4ebe 100644
--- a/store/store.go
+++ b/store/store.go
@@ -35,6 +35,7 @@ type Store interface {
 	Audit() AuditStore
 	Session() SessionStore
 	OAuth() OAuthStore
+	System() SystemStore
 	Close()
 }
 
@@ -130,3 +131,9 @@ type OAuthStore interface {
 	GetAccessDataByAuthCode(authCode string) StoreChannel
 	RemoveAccessData(token string) StoreChannel
 }
+
+type SystemStore interface {
+	Save(system *model.System) StoreChannel
+	Update(system *model.System) StoreChannel
+	Get() StoreChannel
+}