adding notification support

doc/api.oa3

@@ -3914,7 +3914,6 @@ components:
       required:
         - profile
         - content
-        - view # revision increment on sharing changes
         - group
         - label
         - card

net/server/internal/api_addCard.go

@@ -49,6 +49,7 @@ func AddCard(w http.ResponseWriter, r *http.Request) {
     card.Node = identity.Node
     card.ProfileRevision = identity.Revision
     card.Status = APP_CARDCONFIRMED
+    card.ViewRevision = 0
 
   } else {
 

net/server/internal/api_getOpenMessage.go

@@ -36,7 +36,7 @@ func GetOpenMessage(w http.ResponseWriter, r *http.Request) {
   connect := &Connect{
     Contact: card.Guid,
     Token: card.InToken,
-    ContentRevision: account.ViewRevision,
+    ContentRevision: account.ContentRevision + account.ViewRevision + card.ViewRevision,
     ProfileRevision: account.ProfileRevision,
     Handle: account.Username,
     Name: detail.Name,

net/server/internal/notify.go

@@ -0,0 +1,132 @@
+package databag
+
+import (
+  "gorm.io/gorm"
+  "databag/internal/store"
+)
+
+var notify = make(chan *store.Notification)
+var notifyExit = make(chan bool, 1)
+
+func ExitNotifications() {
+  notifyExit <- true
+}
+
+func SendNotifications() {
+
+  // queue all saved notifications
+  var notifications []store.Notification
+  if err := store.DB.Find(&notifications).Error; err != nil {
+    ErrMsg(err)
+  }
+  for _, notification := range notifications {
+    notify <- &notification
+  }
+
+  // send notifications until exit
+  for {
+    select {
+      case notification := <-notify:
+        PrintMsg("SENDING")
+        PrintMsg(notification)
+      case <-notifyExit:
+        PrintMsg("EXITING")
+    }
+  }
+}
+
+// notify all cards of profile change
+func SetProfileNotification(account *store.Account) {
+
+  // select all connected cards
+  var cards []store.Card
+  if err := store.DB.Where("account_id = ? AND status = ?", account.ID, APP_CARDCONNECTED).Find(&cards).Error; err != nil {
+    ErrMsg(err)
+    return
+  }
+
+  // add new notification for each card
+  err := store.DB.Transaction(func(tx *gorm.DB) error {
+    for _, card := range cards {
+      notification := &store.Notification{
+        Url: card.Node + "/contact/profile/revision",
+        Token: card.OutToken,
+        Revision: account.ProfileRevision,
+      }
+      if err := tx.Save(notification).Error; err != nil {
+        return err
+      }
+      notify <- notification
+    }
+    return nil
+  })
+  if err != nil {
+    ErrMsg(err)
+  }
+}
+
+// notify all cards of content change
+// account.Content incremented by adding, updating, removing article
+// account.View incremented by removing a group or label or adding or removing a group with label
+func SetContentNotification(account *store.Account) {
+
+  // select all connected cards
+  var cards []store.Card
+  if err := store.DB.Where("account_id = ? AND status = ?", account.ID, APP_CARDCONNECTED).Find(&cards).Error; err != nil {
+    ErrMsg(err)
+    return
+  }
+
+  // add new notification for each card
+  err := store.DB.Transaction(func(tx *gorm.DB) error {
+    for _, card := range cards {
+      notification := &store.Notification{
+        Url: card.Node + "/contact/content/revision",
+        Token: card.OutToken,
+        Revision: account.ViewRevision + account.ContentRevision + card.ViewRevision,
+      }
+      if err := tx.Save(notification).Error; err != nil {
+        return err
+      }
+      notify <- notification
+    }
+    return nil
+  })
+  if err != nil {
+    ErrMsg(err)
+  }
+}
+
+// notify single card of content change
+// card.View incremented by adding or removing card from group or label
+func SetContactContentNotification(account *store.Account, cardId string) {
+
+  // select card if connected
+  var cards []store.Card
+  if err := store.DB.Where("account_id = ? AND status = ? AND card_id = ?", account.ID, APP_CARDCONNECTED, cardId).Find(&cards).Error; err != nil {
+    ErrMsg(err)
+    return
+  }
+
+  // add new notification for card
+  err := store.DB.Transaction(func(tx *gorm.DB) error {
+    for _, card := range cards {
+      notification := &store.Notification{
+        Url: card.Node + "/contact/content/revision",
+        Token: card.OutToken,
+        Revision: account.ViewRevision + account.ContentRevision + card.ViewRevision,
+      }
+      if err := tx.Save(notification).Error; err != nil {
+        return err
+      }
+      notify <- notification
+    }
+    return nil
+  })
+  if err != nil {
+    ErrMsg(err)
+  }
+}
+
+
+

net/server/internal/routers.go

@@ -28,6 +28,8 @@ type Routes []Route
 
 func NewRouter() *mux.Router {
 
+  go SendNotifications()
+
 	router := mux.NewRouter().StrictSlash(true)
 	for _, route := range routes {
 		var handler http.Handler

net/server/internal/store/schema.go

@@ -3,6 +3,7 @@ package store
 import "gorm.io/gorm"
 
 func AutoMigrate(db *gorm.DB) {
+  db.AutoMigrate(&Notification{});
   db.AutoMigrate(&Config{});
   db.AutoMigrate(&App{});
   db.AutoMigrate(&Account{});
@@ -26,6 +27,13 @@ func AutoMigrate(db *gorm.DB) {
   db.AutoMigrate(&TopicTag{});
 }
 
+type Notification struct {
+  ID                uint            `gorm:"primaryKey;not null;unique;autoIncrement"`
+  Url               string          `gorm:"not null"`
+  Token             string          `gorm:"not null"`
+  Revision          int64           `gorm:"not null"`
+}
+
 type Config struct {
   ID                uint            `gorm:"primaryKey;not null;unique;autoIncrement"`
   ConfigId          string          `gorm:"not null;uniqueIndex"`
@@ -53,12 +61,12 @@ type Account struct {
   Password          []byte          `gorm:"not null"`
   ProfileRevision   int64           `gorm:"not null;default:1"`
   ContentRevision   int64           `gorm:"not null;default:1"`
-  ViewRevision      int64           `gorm:"not null;default:1"`
   GroupRevision     int64           `gorm:"not null;default:1"`
   LabelRevision     int64           `gorm:"not null;default:1"`
   CardRevision      int64           `gorm:"not null;default:1"`
   DialogueRevision  int64           `gorm:"not null;default:1"`
   InsightRevision   int64           `gorm:"not null;default:1"`
+  ViewRevision      int64           `gorm:"not null;default:1"`
   Created           int64           `gorm:"autoCreateTime"`
   Disabled          bool            `gorm:"not null;default:false"`
   AccountDetail     AccountDetail
@@ -132,6 +140,7 @@ type Card struct {
   DataRevision      int64           `gorm:"not null"`
   Created           int64           `gorm:"autoCreateTime"`
   Updated           int64           `gorm:"autoUpdateTime"`
+  ViewRevision      int64           `gorm:"not null"`
   RemoteProfile     int64
   RemoteContent     int64
   Account           Account