Work on AS activities and objects

storage-new/models/NoteEditLog.go

@@ -0,0 +1,45 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gen"
+)
+
+// NoteEdit denotes one edit done to one known note.
+// The table is (within this application) append only
+// (Except for the case where a note is hard deleted,
+// where the edits for it also need to be deleted.
+// Direct access to the db also circumvents this).
+// Every edit will append one entry per edited field, denoting
+// the field and how it was changed, in chronological order
+type NoteEdit struct {
+	Note      Note
+	NoteId    string    `gorm:"primaryKey;autoIncrement:false;<-:create"`
+	EditNr    uint64    `gorm:"primaryKey;autoIncrement:false;<-:create"`
+	CreatedAt time.Time `gorm:"<-:create"`
+	Before    string    `gorm:"<-:create"`
+	After     string    `gorm:"<-:create"`
+	Field     string    `gorm:"<-:create"` // What was edited
+}
+
+type INoteEdit interface {
+	// Append a new edit to a note
+	//
+	// INSERT INTO @@table
+	//   (note_id, edit_nr, created_at, before, after, field)
+	// VALUES (
+	//   @note_id,
+	//   (SELECT COUNT(*) FROM @@table WHERE note_id = @noteId)+1,
+	//   NOW(),
+	//   @before,
+	//   @after,
+	//   @field
+	// )
+	AppendEdit(noteId, before, after, field string) error
+
+	// Find all edits for a field
+	//
+	// SELECT * FROM @@table WHERE note_id = @noteId AND field = @field
+	FindEditsForField(noteId, field string) ([]gen.T, error)
+}