add nextLogs and prevLogs suggestions to log.

models/log.go

@@ -15,6 +15,14 @@ type Log struct {
 	CharacterIDs []string  `bson:"characterIds"`
 }
 
+// A LogSuggestion is a suggestion for a log.
+type LogSuggestion struct {
+	Log        *Log
+	Characters []*Character
+	HasChannel bool
+	HasEvent   bool
+}
+
 // IsChangeObject is an interface implementation to identify it as a valid
 // ChangeObject in GQL.
 func (*Log) IsChangeObject() {
@@ -28,6 +36,8 @@ type LogFilter struct {
 	Characters []string
 	Channels   []string
 	Events     []string
+	MinDate    *time.Time
+	MaxDate    *time.Time
 	Limit      int
 }