Changes to change system.

.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
+  </state>
+</component>

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="GoNilness" enabled="false" level="WARNING" enabled_by_default="false" />
+  </profile>
+</component>

cmd/rpdata-server/main.go

@@ -16,7 +16,6 @@ import (
 	"git.aiterp.net/rpdata/api/internal/loader"
 	"git.aiterp.net/rpdata/api/internal/store"
 	"git.aiterp.net/rpdata/api/models"
-	"git.aiterp.net/rpdata/api/models/changes"
 	"git.aiterp.net/rpdata/api/models/logs"
 	"git.aiterp.net/rpdata/api/services"
 	"github.com/99designs/gqlgen/handler"
@@ -52,13 +51,13 @@ func main() {
 		log.Println("Characters updated")
 	}()
 
-	go logListedChanges()
+	go logListedChanges(services.Changes)
 
 	log.Fatal(http.ListenAndServe(":8081", nil))
 }
 
-func logListedChanges() {
-	sub := changes.Subscribe(context.Background(), nil, true)
+func logListedChanges(changes *services.ChangeService) {
+	sub := changes.Subscribe(context.Background(), models.ChangeFilter{PassAll: true})
 
 	for change := range sub {
 		log.Printf("Change: Author=%#+v Model=%#+v Op=%#+v", change.Author, change.Model, change.Op)

database/mongodb/changes.go

@@ -0,0 +1,104 @@
+package mongodb
+
+import (
+	"context"
+	"git.aiterp.net/rpdata/api/models"
+	"git.aiterp.net/rpdata/api/repositories"
+	"github.com/globalsign/mgo"
+	"github.com/globalsign/mgo/bson"
+	"strconv"
+	"time"
+)
+
+type changeRepository struct {
+	changes   *mgo.Collection
+	idCounter *counter
+}
+
+func (r *changeRepository) Find(ctx context.Context, id string) (*models.Change, error) {
+	change := new(models.Change)
+	err := r.changes.FindId(id).One(change)
+	if err != nil {
+		return nil, err
+	}
+
+	return change, nil
+}
+
+func (r *changeRepository) List(ctx context.Context, filter models.ChangeFilter) ([]*models.Change, error) {
+	query := bson.M{}
+	limit := 0
+	if filter.EarliestDate != nil && !filter.EarliestDate.IsZero() {
+		query["date"] = bson.M{"$gte": *filter.EarliestDate}
+	}
+	if len(filter.Keys) > 0 {
+		query["keys"] = bson.M{"$in": filter.Keys}
+	}
+	if filter.Author != nil && *filter.Author != "" {
+		query["author"] = *filter.Author
+	}
+	if filter.Limit != nil {
+		limit = *filter.Limit
+	}
+
+	initialSize := 64
+	if limit > 0 && limit < 256 {
+		initialSize = limit
+	}
+
+	changes := make([]*models.Change, 0, initialSize)
+	err := r.changes.Find(query).All(&changes)
+	if err != nil {
+		return nil, err
+	}
+
+	return changes, nil
+}
+
+func (r *changeRepository) Insert(ctx context.Context, change models.Change) (*models.Change, error) {
+	next, err := r.idCounter.Increment(1)
+	if err != nil {
+		return nil, err
+	}
+
+	change.ID = "Change_" + strconv.Itoa(next)
+
+	err = r.changes.Insert(change)
+	if err != nil {
+		return nil, err
+	}
+
+	return &change, nil
+}
+
+func (r *changeRepository) Remove(ctx context.Context, change models.Change) error {
+	return r.changes.RemoveId(change.ID)
+}
+
+func newChangeRepository(db *mgo.Database) (repositories.ChangeRepository, error) {
+	collection := db.C("common.changes")
+
+	err := collection.EnsureIndex(mgo.Index{
+		Name:        "expiry",
+		Key:         []string{"date"},
+		ExpireAfter: time.Hour * 2400, // 100 days
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	err = collection.EnsureIndexKey("author")
+	if err != nil {
+		return nil, err
+	}
+
+	err = collection.EnsureIndexKey("keys")
+	if err != nil {
+		return nil, err
+	}
+
+	return &changeRepository{
+		changes:   collection,
+		idCounter: newCounter(db, "auto_increment", "Change"),
+	}, nil
+}

database/mongodb/db.go

@@ -38,8 +38,15 @@ func Init(cfg config.Database) (bundle *repositories.Bundle, closeFn func() erro
 		return nil, nil, err
 	}
 
+	changes, err := newChangeRepository(db)
+	if err != nil {
+		session.Close()
+		return nil, nil, err
+	}
+
 	bundle = &repositories.Bundle{
 		Characters: characters,
+		Changes:    changes,
 		Tags:       newTagRepository(db),
 	}
 
@@ -73,6 +80,22 @@ func (c *counter) WithName(name string) *counter {
 	}
 }
 
+func (c *counter) WithCategory(category string) *counter {
+	return &counter{
+		coll:     c.coll,
+		category: category,
+		name:     c.name,
+	}
+}
+
+func (c *counter) With(category, name string) *counter {
+	return &counter{
+		coll:     c.coll,
+		category: category,
+		name:     name,
+	}
+}
+
 func (c *counter) Increment(amount int) (int, error) {
 	type counterDoc struct {
 		ID    string `bson:"_id"`

graph2/complexity.go

@@ -3,7 +3,6 @@ package graph2
 import (
 	"git.aiterp.net/rpdata/api/graph2/graphcore"
 	"git.aiterp.net/rpdata/api/models"
-	"git.aiterp.net/rpdata/api/models/changes"
 	"git.aiterp.net/rpdata/api/models/channels"
 	"git.aiterp.net/rpdata/api/models/files"
 	"git.aiterp.net/rpdata/api/models/logs"
@@ -71,7 +70,7 @@ func complexity() (cr graphcore.ComplexityRoot) {
 	cr.Query.Files = func(childComplexity int, filter *files.Filter) int {
 		return childComplexity + listComplexity
 	}
-	cr.Query.Changes = func(childComplexity int, filter *changes.Filter) int {
+	cr.Query.Changes = func(childComplexity int, filter *models.ChangeFilter) int {
 		return childComplexity + listComplexity
 	}
 	cr.Query.Token = func(childComplexity int) int {

graph2/gqlgen.yml

@@ -62,7 +62,7 @@ models:
   ChangeKeyInput: # It's the same as ChangeKey
     model: git.aiterp.net/rpdata/api/models.ChangeKey
   ChangesFilter:
-    model: git.aiterp.net/rpdata/api/models/changes.Filter
+    model: git.aiterp.net/rpdata/api/models.ChangeFilter
   Token:
     model: git.aiterp.net/rpdata/api/models.Token
   User:

graph2/resolvers/changes.go

@@ -2,39 +2,25 @@ package resolvers
 
 import (
 	"context"
-	"errors"
-
 	"git.aiterp.net/rpdata/api/models"
-	"git.aiterp.net/rpdata/api/models/changes"
 )
 
 /// Queries
 
-func (r *queryResolver) Changes(ctx context.Context, filter *changes.Filter) ([]*models.Change, error) {
-	changes, err := changes.List(filter)
-	if err != nil {
-		return nil, err
-	}
-
-	changes2 := make([]*models.Change, len(changes))
-	for i := range changes {
-		changes2[i] = &changes[i]
+func (r *queryResolver) Changes(ctx context.Context, filter *models.ChangeFilter) ([]*models.Change, error) {
+	if filter == nil {
+		filter = &models.ChangeFilter{}
 	}
 
-	return changes2, nil
+	return r.s.Changes.List(ctx, *filter)
 }
 
 /// Subscriptions
 
-func (r *subscriptionResolver) Changes(ctx context.Context, keys []*models.ChangeKey) (<-chan *models.Change, error) {
-	if len(keys) == 0 {
-		return nil, errors.New("At least one key is required for a subscription")
-	}
-
-	keys2 := make([]models.ChangeKey, len(keys))
-	for i := range keys {
-		keys2[i] = *keys[i]
+func (r *subscriptionResolver) Changes(ctx context.Context, filter *models.ChangeFilter) (<-chan *models.Change, error) {
+	if filter == nil {
+		filter = &models.ChangeFilter{}
 	}
 
-	return changes.Subscribe(ctx, keys2, false), nil
+	return r.s.Changes.Subscribe(ctx, *filter), nil
 }

graph2/schema/root.gql

@@ -164,7 +164,7 @@ type Subscription {
   """
   Changes subscribes to the changes matching the following keys.
   """
-  changes(keys: [ChangeKeyInput!]!): Change!
+  changes(filter: ChangesFilter): Change!
 }
 
 # A Time represents a RFC3339 encoded date with up to millisecond precision.

graph2/schema/types/Change.gql

@@ -73,9 +73,12 @@ input ChangesFilter {
   "The keys to query for."
   keys: [ChangeKeyInput!]
 
+  "Only show changes by this author"
+  author: String
+
   "Only show changes more recent than this date."
   earliestDate: Time
 
-  "Limit the amount of results."
+  "Limit the amount of results. This even goes for subscriptions!"
   limit: Int
 }

internal/auth/token.go

@@ -114,20 +114,24 @@ func CheckToken(tokenString string) (token models.Token, err error) {
 		return models.Token{}, ErrDeletedUser
 	}
 
-	acceptedPermissions := make([]string, 0, 8)
-	for _, permission := range permissions {
-		found := false
-
-		for _, userPermission := range user.Permissions {
-			if permission == userPermission {
-				found = true
-				break
+	acceptedPermissions := make([]string, 0, len(user.Permissions))
+	if len(permissions) > 0 {
+		for _, permission := range permissions {
+			found := false
+
+			for _, userPermission := range user.Permissions {
+				if permission == userPermission {
+					found = true
+					break
+				}
 			}
-		}
 
-		if found {
-			acceptedPermissions = append(acceptedPermissions, permission)
+			if found {
+				acceptedPermissions = append(acceptedPermissions, permission)
+			}
 		}
+	} else {
+		acceptedPermissions = append(acceptedPermissions, user.Permissions...)
 	}
 
 	return models.Token{UserID: user.ID, Permissions: acceptedPermissions}, nil
@@ -153,10 +157,10 @@ func parseClaims(jwtClaims jwt.Claims) (userid string, permissions []string, err
 				permissions = append(permissions, permission)
 			}
 		}
-	}
 
-	if len(permissions) == 0 {
-		return "", nil, ErrInvalidClaims
+		if len(permissions) == 0 {
+			return "", nil, ErrInvalidClaims
+		}
 	}
 
 	return

internal/notifier/notifier.go

@@ -0,0 +1,44 @@
+package notifier
+
+import (
+	"context"
+	"sync"
+)
+
+// A Notifier is a synchronization primitive for waking upp all listeners at once.
+type Notifier struct {
+	mutex sync.Mutex
+	ch    chan struct{}
+}
+
+// Broadcast wakes all listeners if there are any.
+func (notifier *Notifier) Broadcast() {
+	notifier.mutex.Lock()
+	if notifier.ch != nil {
+		close(notifier.ch)
+		notifier.ch = nil
+	}
+	notifier.mutex.Unlock()
+}
+
+// C gets the channel that'll close on the next notification.
+func (notifier *Notifier) C() <-chan struct{} {
+	notifier.mutex.Lock()
+	if notifier.ch == nil {
+		notifier.ch = make(chan struct{})
+	}
+	ch := notifier.ch
+	notifier.mutex.Unlock()
+
+	return ch
+}
+
+// Wait waits for the next `Broadcast` call, or the context's termination.
+func (notifier *Notifier) Wait(ctx context.Context) error {
+	select {
+	case <-notifier.C():
+		return nil
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}

models/change.go

@@ -1,6 +1,9 @@
 package models
 
-import "time"
+import (
+	"reflect"
+	"time"
+)
 
 // Change represents a change in the rpdata history through the API.
 type Change struct {
@@ -22,15 +25,55 @@ type Change struct {
 	Comments   []Comment   `bson:"comments"`
 }
 
-// ChangeKey is a key for a change that can be used when subscribing to them.
-type ChangeKey struct {
-	Model ChangeModel `bson:"model"`
-	ID    string      `bson:"id"`
+// AddObject adds the model into the appropriate array.
+func (change *Change) AddObject(object interface{}) bool {
+	if v := reflect.ValueOf(object); v.Kind() == reflect.Ptr {
+		return change.AddObject(v.Elem().Interface())
+	}
+
+	switch object := object.(type) {
+	case Log:
+		change.Logs = append(change.Logs, object)
+	case []Log:
+		change.Logs = append(change.Logs, object...)
+	case Character:
+		change.Characters = append(change.Characters, object)
+	case []Character:
+		change.Characters = append(change.Characters, object...)
+	case Channel:
+		change.Channels = append(change.Channels, object)
+	case []Channel:
+		change.Channels = append(change.Channels, object...)
+	case Post:
+		change.Posts = append(change.Posts, object)
+	case []Post:
+		change.Posts = append(change.Posts, object...)
+	case Story:
+		change.Stories = append(change.Stories, object)
+	case []Story:
+		change.Stories = append(change.Stories, object...)
+	case Tag:
+		change.Tags = append(change.Tags, object)
+	case []Tag:
+		change.Tags = append(change.Tags, object...)
+	case Chapter:
+		change.Chapters = append(change.Chapters, object)
+	case []Chapter:
+		change.Chapters = append(change.Chapters, object...)
+	case Comment:
+		change.Comments = append(change.Comments, object)
+	case []Comment:
+		change.Comments = append(change.Comments, object...)
+	default:
+		return false
+	}
+
+	return true
 }
 
 // Objects makes a combined, mixed array of all the models stored in this change.
 func (change *Change) Objects() []interface{} {
-	data := make([]interface{}, 0, len(change.Logs)+len(change.Characters)+len(change.Channels)+len(change.Posts)+len(change.Stories)+len(change.Tags)+len(change.Chapters)+len(change.Comments))
+	data := make([]interface{}, 0, 8)
 
 	for _, log := range change.Logs {
 		data = append(data, &log)
@@ -59,3 +102,76 @@ func (change *Change) Objects() []interface{} {
 
 	return data
 }
+
+func (change *Change) PassesFilter(filter ChangeFilter) bool {
+	if filter.PassAll {
+		return true
+	}
+
+	if filter.Author != nil && change.Author != *filter.Author {
+		return false
+	}
+
+	// For unlisted changes, pass it only if the filter refers to the specific index.
+	if !change.Listed {
+		hasSpecificKey := false
+
+	KeyFindLoop:
+		for _, key := range filter.Keys {
+			if key.ID == "*" {
+				continue
+			}
+
+			for _, changeKey := range change.Keys {
+				if changeKey.Model == key.Model && changeKey.ID == key.ID {
+					hasSpecificKey = true
+					break KeyFindLoop
+				}
+			}
+		}
+
+		if !hasSpecificKey {
+			return false
+		}
+	}
+
+	if filter.EarliestDate != nil && filter.EarliestDate.Before(change.Date) {
+		return false
+	}
+
+	if len(filter.Keys) > 0 {
+		foundKey := false
+
+	KeyFindLoop2:
+		for _, key := range filter.Keys {
+			for _, changeKey := range change.Keys {
+				if changeKey == key {
+					foundKey = true
+					break KeyFindLoop2
+				}
+			}
+		}
+
+		if !foundKey {
+			return false
+		}
+	}
+
+	return true
+}
+
+// ChangeKey is a key for a change that can be used when subscribing to them.
+type ChangeKey struct {
+	Model ChangeModel `bson:"model"`
+	ID    string      `bson:"id"`
+}
+
+// ChangeFilter is a filter for listing changes.
+type ChangeFilter struct {
+	Keys         []ChangeKey
+	EarliestDate *time.Time
+	Author       *string
+	Limit        *int
+
+	PassAll bool // DO NOT EXPOSE
+}

models/changes/db.go

@@ -1,14 +1,11 @@
 package changes
 
 import (
-	"log"
-	"sync"
-	"time"
-
 	"git.aiterp.net/rpdata/api/internal/store"
 	"git.aiterp.net/rpdata/api/models"
 	"github.com/globalsign/mgo"
 	"github.com/globalsign/mgo/bson"
+	"sync"
 )
 
 var collection *mgo.Collection
@@ -24,18 +21,5 @@ func list(query bson.M, limit int) ([]models.Change, error) {
 func init() {
 	store.HandleInit(func(db *mgo.Database) {
 		collection = db.C("common.changes")
-
-		collection.EnsureIndexKey("date")
-		collection.EnsureIndexKey("author")
-		collection.EnsureIndexKey("keys")
-
-		err := collection.EnsureIndex(mgo.Index{
-			Name:        "expiry",
-			Key:         []string{"date"},
-			ExpireAfter: time.Hour * 2400, // 100 days
-		})
-		if err != nil {
-			log.Fatalln(err)
-		}
 	})
 }

repositories/change.go

@@ -0,0 +1,13 @@
+package repositories
+
+import (
+	"context"
+	"git.aiterp.net/rpdata/api/models"
+)
+
+type ChangeRepository interface {
+	Find(ctx context.Context, id string) (*models.Change, error)
+	List(ctx context.Context, filter models.ChangeFilter) ([]*models.Change, error)
+	Insert(ctx context.Context, change models.Change) (*models.Change, error)
+	Remove(ctx context.Context, change models.Change) error
+}

repositories/repository.go

@@ -5,6 +5,7 @@ import "errors"
 // A Bundle is a set of repositories.
 type Bundle struct {
 	Characters CharacterRepository
+	Changes    ChangeRepository
 	Tags       TagRepository
 }
 

services/changes.go

@@ -0,0 +1,133 @@
+package services
+
+import (
+	"context"
+	"git.aiterp.net/rpdata/api/internal/auth"
+	"git.aiterp.net/rpdata/api/internal/notifier"
+	"git.aiterp.net/rpdata/api/models"
+	"git.aiterp.net/rpdata/api/repositories"
+	"log"
+	"sync"
+	"time"
+)
+
+type ChangeService struct {
+	changes repositories.ChangeRepository
+
+	mutex       sync.RWMutex
+	buffer      []models.Change
+	offset      uint64
+	notifier    notifier.Notifier
+	submitQueue chan *models.Change
+	loopStarted bool
+}
+
+func (s *ChangeService) Find(ctx context.Context, id string) (*models.Change, error) {
+	return s.changes.Find(ctx, id)
+}
+
+func (s *ChangeService) List(ctx context.Context, filter models.ChangeFilter) ([]*models.Change, error) {
+	return s.changes.List(ctx, filter)
+}
+
+func (s *ChangeService) Submit(ctx context.Context, model models.ChangeModel, op string, listed bool, keys []models.ChangeKey, objects ...interface{}) {
+	token := auth.TokenFromContext(ctx)
+	if token == nil {
+		panic("no token!")
+	}
+
+	change := &models.Change{
+		Model:  model,
+		Op:     op,
+		Author: token.UserID,
+		Listed: listed,
+		Keys:   keys,
+	}
+
+	for _, obj := range objects {
+		if !change.AddObject(obj) {
+			log.Printf("Cannot add object of type %T to change", obj)
+		}
+	}
+
+	s.mutex.Lock()
+	if !s.loopStarted {
+		s.loopStarted = true
+		s.submitQueue = make(chan *models.Change, 64)
+		go s.loop()
+	}
+	s.mutex.Unlock()
+
+	s.submitQueue <- change
+}
+
+func (s *ChangeService) Subscribe(ctx context.Context, filter models.ChangeFilter) <-chan *models.Change {
+	channel := make(chan *models.Change)
+
+	go func() {
+		defer close(channel)
+
+		s.mutex.RLock()
+		pos := s.offset + uint64(len(s.buffer))
+		slice := make([]models.Change, 32)
+		s.mutex.RUnlock()
+
+		count := 0
+
+		for {
+			s.mutex.RLock()
+			nextPos := s.offset + uint64(len(s.buffer))
+			length := nextPos - pos
+			if length > 0 {
+				index := pos - s.offset
+
+				pos = nextPos
+				copy(slice, s.buffer[index:])
+			}
+			ch := s.notifier.C()
+			s.mutex.RUnlock()
+
+			for _, change := range slice[:length] {
+				if change.PassesFilter(filter) {
+					channel <- &change
+
+					count++
+					if filter.Limit != nil && count == *filter.Limit {
+						return
+					}
+				}
+			}
+
+			select {
+			case <-ch:
+			case <-ctx.Done():
+				return
+			}
+		}
+	}()
+
+	return channel
+}
+
+func (s *ChangeService) loop() {
+	for change := range s.submitQueue {
+		timeout, cancel := context.WithTimeout(context.Background(), time.Second*15)
+
+		change, err := s.changes.Insert(timeout, *change)
+		if err != nil {
+			log.Println("Failed to submit change:")
+		}
+
+		s.mutex.Lock()
+		s.buffer = append(s.buffer, *change)
+		if len(s.buffer) > 16 {
+			copy(s.buffer, s.buffer[8:])
+			s.buffer = s.buffer[:len(s.buffer)-8]
+			s.offset += 8
+		}
+		s.mutex.Unlock()
+		s.notifier.Broadcast()
+
+		cancel()
+	}
+}

services/characters.go

@@ -6,7 +6,6 @@ import (
 	"git.aiterp.net/rpdata/api/internal/auth"
 	"git.aiterp.net/rpdata/api/models"
 	"git.aiterp.net/rpdata/api/models/changekeys"
-	"git.aiterp.net/rpdata/api/models/changes"
 	"git.aiterp.net/rpdata/api/repositories"
 	"git.aiterp.net/rpdata/api/services/loaders"
 	"sort"
@@ -14,8 +13,9 @@ import (
 )
 
 type CharacterService struct {
-	characters repositories.CharacterRepository
-	loader     *loaders.CharacterLoader
+	characters    repositories.CharacterRepository
+	loader        *loaders.CharacterLoader
+	changeService *ChangeService
 }
 
 // Find uses the loader to find the character by the ID.
@@ -101,8 +101,7 @@ func (s *CharacterService) Create(ctx context.Context, nick, name, shortName, au
 		return nil, err
 	}
 
-	//TODO: New change submit system
-	go changes.Submit("Character", "add", token.UserID, true, changekeys.Listed(character), character)
+	s.changeService.Submit(ctx, "Character", "add", true, changekeys.Listed(character), character)
 
 	return character, nil
 }
@@ -130,9 +129,7 @@ func (s *CharacterService) Update(ctx context.Context, id string, name, shortNam
 	s.loader.Clear(character.ID)
 	s.loader.Prime(character.ID, character)
 
-	//TODO: New change submit system
-	token := auth.TokenFromContext(ctx)
-	go changes.Submit("Character", "edit", token.UserID, true, changekeys.Listed(character), character)
+	s.changeService.Submit(ctx, "Character", "edit", true, changekeys.Listed(character), character)
 
 	return character, nil
 }
@@ -153,9 +150,7 @@ func (s *CharacterService) AddNick(ctx context.Context, id string, nick string)
 		return nil, err
 	}
 
-	//TODO: New change submit system
-	token := auth.TokenFromContext(ctx)
-	go changes.Submit("Character", "edit", token.UserID, true, changekeys.Listed(character), character)
+	s.changeService.Submit(ctx, "Character", "edit", true, changekeys.Listed(character), character)
 
 	return character, nil
 }
@@ -176,9 +171,7 @@ func (s *CharacterService) RemoveNick(ctx context.Context, id string, nick strin
 		return nil, err
 	}
 
-	//TODO: New change submit system
-	token := auth.TokenFromContext(ctx)
-	go changes.Submit("Character", "edit", token.UserID, true, changekeys.Listed(character), character)
+	s.changeService.Submit(ctx, "Character", "edit", true, changekeys.Listed(character), character)
 
 	return character, nil
 }
@@ -199,9 +192,7 @@ func (s *CharacterService) Delete(ctx context.Context, id string) (*models.Chara
 		return nil, err
 	}
 
-	//TODO: New change submit system
-	token := auth.TokenFromContext(ctx)
-	go changes.Submit("Character", "remove", token.UserID, true, changekeys.Listed(character), character)
+	s.changeService.Submit(ctx, "Character", "remove", true, changekeys.Listed(character), character)
 
 	return character, nil
 }

services/services.go

@@ -9,16 +9,21 @@ import (
 type Bundle struct {
 	Tags       *TagService
 	Characters *CharacterService
+	Changes    *ChangeService
 }
 
 // NewBundle creates a new bundle.
 func NewBundle(repos *repositories.Bundle) *Bundle {
 	bundle := &Bundle{}
 
+	bundle.Changes = &ChangeService{
+		changes: repos.Changes,
+	}
 	bundle.Tags = &TagService{tags: repos.Tags}
 	bundle.Characters = &CharacterService{
-		characters: repos.Characters,
-		loader:     loaders.CharacterLoaderFromRepository(repos.Characters),
+		characters:    repos.Characters,
+		loader:        loaders.CharacterLoaderFromRepository(repos.Characters),
+		changeService: bundle.Changes,
 	}
 
 	return bundle