Added pagination (#16)

Featurecreep.md

@@ -222,7 +222,7 @@ Teams sind global, d.h. Ein Team kann mehrere Namespaces verwalten.
 * [ ] Wir brauchen noch ne gute idee, wie man die listen kriegt, auf die man nur so Zugriff hat (ohne namespace)
     * Dazu am Besten nen pseudonamespace anlegen (id -1 oder so), der hat das dann alles
 * [ ] Validation der ankommenden structs, am besten mit https://github.com/go-validator/validator oder mit dem Ding von echo
-* [ ] Pagination
+* [x] Pagination
 	* Sollte in der Config definierbar sein, wie viel pro Seite angezeigt werden soll, die CRUD-Methoden übergeben dann ein "gibt mir die Seite sowieso" an die CRUDable-Funktionenen, die müssen das dann Auswerten. Geht leider nicht anders, wenn man erst 2342352 Einträge hohlt und die dann nachträglich auf 200 begrenzt ist das ne massive Ressourcenverschwendung.
 * [ ] Testing mit locust: https://locust.io/
 * [ ] Methode einbauen, um mit einem gültigen token ein neues gültiges zu kriegen

REST-Tests/auth.http

@@ -4,7 +4,7 @@ Content-Type: application/json
 
 {
   "username": "user",
-  "password": "12345"
+  "password": "1234"
 }
 
 > {% client.global.set("auth_token", response.body.token); %}

REST-Tests/lists.http

@@ -1,5 +1,5 @@
 # Get all lists
-GET http://localhost:8080/api/v1/lists
+GET http://localhost:8080/api/v1/lists?page=0
 Authorization: Bearer {{auth_token}}
 
 ###

config.yml.sample

@@ -7,6 +7,8 @@ service:
   interface: ":3456"
   # The URL of the frontend, used to send password reset emails.
   frontendurl: ""
+  # The number of items which gets returned per page
+  pagecount: 50
 
 database:
   # Database type to use. Supported types are mysql and sqlite.
@@ -48,4 +50,4 @@ mailer:
   # Wether to skip verification of the tls certificate on the server
   skiptlsverify: false
   # The default from address when sending emails
-  fromemail: 'mail@vikunja'
+  fromemail: 'mail@vikunja'

docs/config.md

@@ -33,6 +33,8 @@ service:
   frontendurl: ""
   # The base path on the file system where the binary and assets are
   rootpath: <the path of the executable>
+  # The number of items which gets returned per page
+  pagecount: 50
 
 database:
   # Database type to use. Supported types are mysql and sqlite.

pkg/config/config.go

@@ -29,6 +29,7 @@ func InitConfig() (err error) {
 	}
 	exPath := filepath.Dir(ex)
 	viper.SetDefault("service.rootpath", exPath)
+	viper.SetDefault("service.pagecount", 50)
 	// Database
 	viper.SetDefault("database.type", "sqlite")
 	viper.SetDefault("database.host", "localhost")

pkg/models/crudable.go

@@ -4,7 +4,7 @@ package models
 type CRUDable interface {
 	Create(*User) error
 	ReadOne() error
-	ReadAll(*User) (interface{}, error)
+	ReadAll(*User, int) (interface{}, error)
 	Update() error
 	Delete() error
 }

pkg/models/list.go

@@ -27,8 +27,8 @@ func GetListsByNamespaceID(nID int64) (lists []*List, err error) {
 }
 
 // ReadAll gets all lists a user has access to
-func (l *List) ReadAll(u *User) (interface{}, error) {
+func (l *List) ReadAll(u *User, page int) (interface{}, error) {
-	lists, err := getRawListsForUser(u)
+	lists, err := getRawListsForUser(u, page)
 	if err != nil {
 		return nil, err
 	}
@@ -80,7 +80,7 @@ func (l *List) GetSimpleByID() (err error) {
 }
 
 // Gets the lists only, without any tasks or so
-func getRawListsForUser(u *User) (lists []*List, err error) {
+func getRawListsForUser(u *User, page int) (lists []*List, err error) {
 	fullUser, err := GetUserByID(u.ID)
 	if err != nil {
 		return lists, err
@@ -104,6 +104,7 @@ func getRawListsForUser(u *User) (lists []*List, err error) {
 		Or("ul.user_id = ?", fullUser.ID).
 		Or("un.user_id = ?", fullUser.ID).
 		GroupBy("l.id").
+		Limit(getLimitFromPageIndex(page)).
 		Find(&lists)
 
 	return lists, err
@@ -160,14 +161,14 @@ type ListTasksDummy struct {
 }
 
 // ReadAll gets all tasks for a user
-func (lt *ListTasksDummy) ReadAll(u *User) (interface{}, error) {
+func (lt *ListTasksDummy) ReadAll(u *User, page int) (interface{}, error) {
-	return GetTasksByUser(u)
+	return GetTasksByUser(u, page)
 }
 
 //GetTasksByUser returns all tasks for a user
-func GetTasksByUser(u *User) (tasks []*ListTask, err error) {
+func GetTasksByUser(u *User, page int) (tasks []*ListTask, err error) {
 	// Get all lists
-	lists, err := getRawListsForUser(u)
+	lists, err := getRawListsForUser(u, page)
 	if err != nil {
 		return nil, err
 	}

pkg/models/list_read_test.go

@@ -20,14 +20,14 @@ func TestList_ReadAll(t *testing.T) {
 	assert.NoError(t, err)
 
 	lists2 := List{}
-	lists3, err := lists2.ReadAll(&u)
+	lists3, err := lists2.ReadAll(&u, 1)
 	assert.NoError(t, err)
 	assert.Equal(t, reflect.TypeOf(lists3).Kind(), reflect.Slice)
 	s := reflect.ValueOf(lists3)
 	assert.Equal(t, s.Len(), 1)
 
 	// Try getting lists for a nonexistant user
-	_, err = lists2.ReadAll(&User{ID: 984234})
+	_, err = lists2.ReadAll(&User{ID: 984234}, 1)
 	assert.Error(t, err)
 	assert.True(t, IsErrUserDoesNotExist(err))
 }

pkg/models/list_users_readall.go

@@ -1,7 +1,7 @@
 package models
 
 // ReadAll gets all users who have access to a list
-func (ul *ListUser) ReadAll(u *User) (interface{}, error) {
+func (ul *ListUser) ReadAll(u *User, page int) (interface{}, error) {
 	// Check if the user has access to the list
 	l := &List{ID: ul.ListID}
 	if err := l.GetSimpleByID(); err != nil {
@@ -16,6 +16,7 @@ func (ul *ListUser) ReadAll(u *User) (interface{}, error) {
 	err := x.
 		Join("INNER", "users_list", "user_id = users.id").
 		Where("users_list.list_id = ?", ul.ListID).
+		Limit(getLimitFromPageIndex(page)).
 		Find(&all)
 
 	return all, err

pkg/models/models.go

@@ -90,3 +90,15 @@ func SetEngine() (err error) {
 
 	return nil
 }
+
+func getLimitFromPageIndex(page int) (limit, start int) {
+
+	// Get everything when page index is -1
+	if page < 0 {
+		return 0, 0
+	}
+
+	limit = viper.GetInt("service.pagecount")
+	start = limit * (page - 1)
+	return
+}

pkg/models/namespace.go

@@ -53,7 +53,7 @@ func (n *Namespace) ReadOne() (err error) {
 }
 
 // ReadAll gets all namespaces a user has access to
-func (n *Namespace) ReadAll(doer *User) (interface{}, error) {
+func (n *Namespace) ReadAll(doer *User, page int) (interface{}, error) {
 
 	type namespaceWithLists struct {
 		Namespace `xorm:"extends"`
@@ -71,6 +71,7 @@ func (n *Namespace) ReadAll(doer *User) (interface{}, error) {
 		Or("namespaces.owner_id = ?", doer.ID).
 		Or("users_namespace.user_id = ?", doer.ID).
 		GroupBy("namespaces.id").
+		Limit(getLimitFromPageIndex(page)).
 		Find(&all)
 
 	if err != nil {

pkg/models/namespace_test.go

@@ -85,7 +85,7 @@ func TestNamespace_Create(t *testing.T) {
 	assert.True(t, IsErrNamespaceDoesNotExist(err))
 
 	// Get all namespaces of a user
-	nsps, err := n.ReadAll(&doer)
+	nsps, err := n.ReadAll(&doer, 1)
 	assert.NoError(t, err)
 	assert.Equal(t, reflect.TypeOf(nsps).Kind(), reflect.Slice)
 	s := reflect.ValueOf(nsps)

pkg/models/namespace_users_readall.go

@@ -1,7 +1,7 @@
 package models
 
 // ReadAll gets all users who have access to a namespace
-func (un *NamespaceUser) ReadAll(u *User) (interface{}, error) {
+func (un *NamespaceUser) ReadAll(u *User, page int) (interface{}, error) {
 	// Check if the user has access to the namespace
 	l, err := GetNamespaceByID(un.NamespaceID)
 	if err != nil {
@@ -16,6 +16,7 @@ func (un *NamespaceUser) ReadAll(u *User) (interface{}, error) {
 	err = x.
 		Join("INNER", "users_namespace", "user_id = users.id").
 		Where("users_namespace.namespace_id = ?", un.NamespaceID).
+		Limit(getLimitFromPageIndex(page)).
 		Find(&all)
 
 	return all, err

pkg/models/team_list_readall.go

@@ -1,7 +1,7 @@
 package models
 
 // ReadAll implements the method to read all teams of a list
-func (tl *TeamList) ReadAll(u *User) (interface{}, error) {
+func (tl *TeamList) ReadAll(u *User, page int) (interface{}, error) {
 	// Check if the user can read the namespace
 	l := &List{ID: tl.ListID}
 	if err := l.GetSimpleByID(); err != nil {
@@ -17,6 +17,7 @@ func (tl *TeamList) ReadAll(u *User) (interface{}, error) {
 		Table("teams").
 		Join("INNER", "team_list", "team_id = teams.id").
 		Where("team_list.list_id = ?", tl.ListID).
+		Limit(getLimitFromPageIndex(page)).
 		Find(&all)
 
 	return all, err

pkg/models/team_list_test.go

@@ -50,27 +50,27 @@ func TestTeamList(t *testing.T) {
 	assert.True(t, IsErrListDoesNotExist(err))
 
 	// Test Read all
-	teams, err := tl.ReadAll(&u)
+	teams, err := tl.ReadAll(&u, 1)
 	assert.NoError(t, err)
 	assert.Equal(t, reflect.TypeOf(teams).Kind(), reflect.Slice)
 	s := reflect.ValueOf(teams)
 	assert.Equal(t, s.Len(), 1)
 
 	// Test Read all for nonexistant list
-	_, err = tl4.ReadAll(&u)
+	_, err = tl4.ReadAll(&u, 1)
 	assert.Error(t, err)
 	assert.True(t, IsErrListDoesNotExist(err))
 
 	// Test Read all for a list where the user is owner of the namespace this list belongs to
 	tl5 := tl
 	tl5.ListID = 2
-	_, err = tl5.ReadAll(&u)
+	_, err = tl5.ReadAll(&u, 1)
 	assert.NoError(t, err)
 
 	// Test read all for a list where the user not has access
 	tl6 := tl
 	tl6.ListID = 3
-	_, err = tl6.ReadAll(&u)
+	_, err = tl6.ReadAll(&u, 1)
 	assert.Error(t, err)
 	assert.True(t, IsErrNeedToHaveListReadAccess(err))
 

pkg/models/team_namespace_readall.go

@@ -1,7 +1,7 @@
 package models
 
 // ReadAll implements the method to read all teams of a namespace
-func (tn *TeamNamespace) ReadAll(user *User) (interface{}, error) {
+func (tn *TeamNamespace) ReadAll(user *User, page int) (interface{}, error) {
 	// Check if the user can read the namespace
 	n, err := GetNamespaceByID(tn.NamespaceID)
 	if err != nil {
@@ -17,6 +17,7 @@ func (tn *TeamNamespace) ReadAll(user *User) (interface{}, error) {
 	err = x.Table("teams").
 		Join("INNER", "team_namespaces", "team_id = teams.id").
 		Where("team_namespaces.namespace_id = ?", tn.NamespaceID).
+		Limit(getLimitFromPageIndex(page)).
 		Find(&all)
 
 	return all, err

pkg/models/team_namespace_test.go

@@ -49,20 +49,20 @@ func TestTeamNamespace(t *testing.T) {
 	assert.True(t, IsErrNamespaceDoesNotExist(err))
 
 	// Check readall
-	teams, err := tn.ReadAll(&dummyuser)
+	teams, err := tn.ReadAll(&dummyuser, 1)
 	assert.NoError(t, err)
 	assert.Equal(t, reflect.TypeOf(teams).Kind(), reflect.Slice)
 	s := reflect.ValueOf(teams)
 	assert.Equal(t, s.Len(), 1)
 
 	// Check readall for a nonexistant namespace
-	_, err = tn4.ReadAll(&dummyuser)
+	_, err = tn4.ReadAll(&dummyuser, 1)
 	assert.Error(t, err)
 	assert.True(t, IsErrNamespaceDoesNotExist(err))
 
 	// Check with no right to read the namespace
 	nouser := &User{ID: 393}
-	_, err = tn.ReadAll(nouser)
+	_, err = tn.ReadAll(nouser, 1)
 	assert.Error(t, err)
 	assert.True(t, IsErrNeedToHaveNamespaceReadAccess(err))
 

pkg/models/teams.go

@@ -84,12 +84,13 @@ func (t *Team) ReadOne() (err error) {
 }
 
 // ReadAll gets all teams the user is part of
-func (t *Team) ReadAll(user *User) (teams interface{}, err error) {
+func (t *Team) ReadAll(user *User, page int) (teams interface{}, err error) {
 	all := []*Team{}
 	err = x.Select("teams.*").
 		Table("teams").
 		Join("INNER", "team_members", "team_members.team_id = teams.id").
 		Where("team_members.user_id = ?", user.ID).
+		Limit(getLimitFromPageIndex(page)).
 		Find(&all)
 
 	return all, err

pkg/models/teams_test.go

@@ -32,7 +32,7 @@ func TestTeam_Create(t *testing.T) {
 	assert.True(t, dummyteam.CanRead(&doer))
 
 	// Get all teams the user is part of
-	ts, err := tm.ReadAll(&doer)
+	ts, err := tm.ReadAll(&doer, 1)
 	assert.NoError(t, err)
 	assert.Equal(t, reflect.TypeOf(ts).Kind(), reflect.Slice)
 	s := reflect.ValueOf(ts)

pkg/routes/api/v1/caldav.go

@@ -39,7 +39,7 @@ func Caldav(c echo.Context) error {
 	}
 
 	// Get all tasks for that user
-	tasks, err := models.GetTasksByUser(&u)
+	tasks, err := models.GetTasksByUser(&u, -1)
 	if err != nil {
 		return crud.HandleHTTPError(err)
 	}

pkg/routes/crud/read_all.go

@@ -1,9 +1,11 @@
 package crud
 
 import (
+	"code.vikunja.io/api/pkg/log"
 	"code.vikunja.io/api/pkg/models"
 	"github.com/labstack/echo"
 	"net/http"
+	"strconv"
 )
 
 // ReadAllWeb is the webhandler to get all objects of a type
@@ -21,7 +23,21 @@ func (c *WebHandler) ReadAllWeb(ctx echo.Context) error {
 		return echo.NewHTTPError(http.StatusBadRequest, "No or invalid model provided.")
 	}
 
-	lists, err := currentStruct.ReadAll(&currentUser)
+	// Pagination
+	page := ctx.QueryParam("page")
+	if page == "" {
+		page = "1"
+	}
+	pageNumber, err := strconv.Atoi(page)
+	if err != nil {
+		log.Log.Error(err.Error())
+		return echo.NewHTTPError(http.StatusBadRequest, "Bad page requested.")
+	}
+	if pageNumber < 0 {
+		return echo.NewHTTPError(http.StatusBadRequest, "Bad page requested.")
+	}
+
+	lists, err := currentStruct.ReadAll(&currentUser, pageNumber)
 	if err != nil {
 		return HandleHTTPError(err)
 	}