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init.go
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init.go
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package models
//
// GangGo Application Server
// Copyright (C) 2017 Lukas Matt <lukas@zauberstuhl.de>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
import (
"time"
"errors"
"github.com/revel/revel"
"git.feneas.org/ganggo/ganggo/app/helpers"
"gopkg.in/ganggo/gorm.v2"
_ "gopkg.in/ganggo/gorm.v2/dialects/postgres"
_ "gopkg.in/ganggo/gorm.v2/dialects/mssql"
_ "gopkg.in/ganggo/gorm.v2/dialects/mysql"
_ "gopkg.in/ganggo/gorm.v2/dialects/sqlite"
"fmt"
"regexp"
"runtime"
)
type BaseController struct {
*revel.Controller
}
type Model interface {
FetchID() uint
FetchGuid() string
FetchType() string
FetchPersonID() uint
FetchText() string
HasPublic() bool
IsPublic() bool
}
type Database struct {
Driver string
Url string
}
const (
Reshare = "Reshare"
StatusMessage = "StatusMessage"
ShareablePost = "Post"
ShareableLike = "Like"
ShareableComment = "Comment"
ShareableContact = "Contact"
)
var DB Database
func OpenDatabase() (*gorm.DB, error) {
db, err := gorm.Open(DB.Driver, DB.Url)
if err != nil {
return db, err
}
db.SetLogger(helpers.AppLogWrapper{Name: "gorm"})
db.LogMode(true)
return db, err
}
// XXX Actually I wanted to integrate it in a custom revel controller
// like described here https://revel.github.io/manual/controllers.html
// but it will throw me always:
// panic: NewRoute: Failed to find controller for route path action
func CurrentUser(c *revel.Controller) (User, error) {
db, err := OpenDatabase()
if err != nil {
revel.WARN.Println(err)
return User{}, err
}
defer db.Close()
accessToken := c.Request.Header.Server.Get("access_token")
if len(accessToken) > 0 {
var token OAuthToken
err := token.FindByToken(accessToken[0])
if err != nil {
revel.AppLog.Error("Cannot find token", "error", err)
return User{}, err
}
if !token.User.ActiveLastDay() {
err = token.User.UpdateLastSeen()
if err != nil {
return User{}, err
}
}
return token.User, nil
}
var session Session
err = db.Where("token = ?", c.Session["TOKEN"]).First(&session).Error
if err != nil {
revel.ERROR.Println(err)
return User{}, err
}
if !session.User.ActiveLastDay() {
err = session.User.UpdateLastSeen()
if err != nil {
return User{}, err
}
}
return session.User, nil
}
// BACKEND_ONLY ensures the function
// is not called by the API for example
func BACKEND_ONLY() {
fpcs := make([]uintptr, 1)
// get the caller function
// skip 3 levels to get to the caller
n := runtime.Callers(3, fpcs)
if n == 0 {
return
}
caller := runtime.FuncForPC(fpcs[0])
if caller == nil {
return
}
// get the called function
n = runtime.Callers(2, fpcs)
if n == 0 {
return
}
function := runtime.FuncForPC(fpcs[0])
if function == nil {
return
}
re := regexp.MustCompile(`\/.+\.(.+)\..+$`)
names := re.FindStringSubmatch(caller.Name())
if len(names) == 2 && len(names[1]) > 2 {
if names[1][:3] == "Api" {
panic(names[0] + " is not allowed calling " + function.Name())
}
}
}
func searchAndCreateTags(model Model, db *gorm.DB) error {
var tags Tags
if !model.HasPublic() {
return nil
}
tagNames := helpers.ParseTags(model.FetchText())
for _, match := range tagNames {
tags = append(tags, Tag{
Name: match[1],
ShareableTaggings: ShareableTaggings{
ShareableTagging{
Public: model.IsPublic(),
ShareableID: model.FetchID(),
ShareableType: model.FetchType(),
},
},
})
}
// batch insert doesn't work for gorm, yet
// see https://gopkg.in/ganggo/gorm.v2/issues/255
for _, tag := range tags {
var cnt int
db.Where("name = ?", tag.Name).Find(&tag).Count(&cnt)
// if tag already exists skip it
// and create taggings only
if cnt == 0 {
err := db.Create(&tag).Error
if err != nil {
return err
}
} else {
for _, shareable := range tag.ShareableTaggings {
shareable.TagID = tag.ID
err := db.Create(&shareable).Error
if err != nil {
return err
}
}
}
}
return nil
}
func checkForMentionsInText(model Model) error {
mentions := helpers.ParseMentions(model.FetchText())
if len(mentions) > 0 {
revel.Config.SetSection("ganggo")
localhost, found := revel.Config.String("address")
if !found {
return errors.New("No server address configured")
}
for _, mention := range mentions {
if mention[3] == localhost {
var user User
err := user.FindByUsername(mention[2])
if err != nil {
return err
}
return user.Notify(model)
}
}
}
return nil
}
// This is required since gorm.ModifyColumn only supports postgres engine
// see https://gopkg.in/ganggo/gorm.v2/blob/0a51f6cdc55d1650d9ed3b4c13026cfa9133b01e/scope.go#L1142
func advancedColumnModify(s *gorm.DB, column, dataType string) {
var format string
var scope = s.NewScope(s.Value)
switch DB.Driver {
case "postgres":
format = "ALTER TABLE %v ALTER COLUMN %v TYPE %v"
case "mysql":
format = "ALTER TABLE %v MODIFY %v %v"
case "mssql":
format = "ALTER TABLE %v ALTER COLUMN %v %v"
default:
revel.AppLog.Warn("Database doesn't support alter! Please do it manually",
"driver", DB.Driver, "table", scope.QuotedTableName(),
"column", column, "type", dataType)
return
}
// modify column in scope
scope.Raw(fmt.Sprintf(
format, scope.QuotedTableName(),
scope.Quote(column), dataType,
)).Exec()
}
// returns different methods of searching
// with regular patterns in a database
func advancedColumnSearch(column, expr string) *gorm.ExprResult {
switch DB.Driver {
case "postgres":
return gorm.Expr("? ~ ?", column, expr)
case "mysql":
fallthrough
case "sqlite":
return gorm.Expr("? regexp ?", column, expr)
default:
return gorm.Expr("? like ?", column, expr)
}
}
// returns different methods of using random
// orders in all supported databases
func randomOrder() *gorm.ExprResult {
switch DB.Driver {
case "mssql":
return gorm.Expr("NEWID()")
case "mysql":
return gorm.Expr("RAND()")
default:
return gorm.Expr("RANDOM()")
}
}
// small helper functions to test
// whether a struct was already loaded
func structLoaded(createAt time.Time) bool {
var unInitialized time.Time
return createAt != unInitialized
}