add schema deploy module

module/cmd/cmd.go

@@ -1,6 +1,83 @@
 package cmd
 
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"log"
+
+	"git.trj.tw/golang/mtfosbot/module/schema"
+
+	"git.trj.tw/golang/mtfosbot/model"
+)
+
 // DBTool - deploy database schemas
 func DBTool() {
+	db := model.GetDB()
+	if db == nil {
+		log.Fatal(errors.New("database object is nil"))
+	}
 
+	dbver, err := schema.ReadVersions()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	version := -1
+
+	vcExists := false
+	// check version_ctrl table exists
+	row := db.QueryRowx(`select exists(select 1 from "information_schema"."tables" where "table_schema" = $1 and "table_name" = $2) as exists`, "public", "version_ctrl")
+	err = row.Scan(&vcExists)
+	if err != nil && err != sql.ErrNoRows {
+		log.Fatal(err)
+	}
+
+	// read max version
+	if vcExists {
+		row := db.QueryRowx(`select max(version) as version from "public"."version_ctrl"`)
+		err := row.Scan(&version)
+		if err != nil && err != sql.ErrNoRows {
+			log.Fatal(err)
+		}
+	}
+
+	fmt.Println("Database Schema Version is ", version)
+	var vers []schema.VersionInfo
+	for _, v := range dbver.Versions {
+		if v.Version > version {
+			vers = append(vers, v)
+		}
+	}
+	if len(vers) == 0 {
+		return
+	}
+
+	tx, err := db.Beginx()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for _, v := range vers {
+		fmt.Printf("Run Version: %d, FileName: %s\n", v.Version, v.File)
+		query, err := schema.ReadSchema(v.File)
+		if err != nil {
+			tx.Rollback()
+			log.Fatal(err)
+		}
+		// run schema file
+		_, err = tx.Exec(query)
+		if err != nil {
+			tx.Rollback()
+			log.Fatal(err)
+		}
+		// insert version ctrl
+		_, err = tx.Exec(`insert into "public"."version_ctrl" ("version", "ctime", "querystr") values ($1, now(), $2)`, v.Version, query)
+		if err != nil {
+			tx.Rollback()
+			log.Fatal(err)
+		}
+	}
+
+	tx.Commit()
 }

module/schema/schema.go

@@ -0,0 +1,43 @@
+package schema
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+)
+
+// DBVersions -
+type DBVersions struct {
+	Versions []VersionInfo `json:"versions"`
+	Test     []VersionInfo `json:"test"`
+}
+
+// VersionInfo -
+type VersionInfo struct {
+	File    string `json:"file"`
+	Version int    `json:"version"`
+}
+
+// ReadVersions -
+func ReadVersions() (dbver DBVersions, err error) {
+	f, err := Asset("schema/dbVersion.json")
+	if err != nil {
+		return dbver, err
+	}
+
+	err = json.Unmarshal(f, &dbver)
+	return
+}
+
+// ReadSchema -
+func ReadSchema(name string) (q string, err error) {
+	if len(name) == 0 {
+		return "", errors.New("name is empty")
+	}
+	f, err := Asset(fmt.Sprintf("schema/%s", name))
+	if err != nil {
+		return
+	}
+	q = string(f)
+	return
+}