Init V4 community edition (#2265)

* Init V4 community edition

* Init V4 community edition

ent/schema/share.go

@@ -0,0 +1,50 @@
+package schema
+
+import (
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+)
+
+// Share holds the schema definition for the Share entity.
+type Share struct {
+	ent.Schema
+}
+
+// Fields of the Share.
+func (Share) Fields() []ent.Field {
+	return []ent.Field{
+		field.String("password").
+			Optional(),
+		field.Int("views").
+			Default(0),
+		field.Int("downloads").
+			Default(0),
+		field.Time("expires").
+			Nillable().
+			Optional().
+			SchemaType(map[string]string{
+				dialect.MySQL: "datetime",
+			}),
+		field.Int("remain_downloads").
+			Nillable().
+			Optional(),
+	}
+}
+
+// Edges of the Share.
+func (Share) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.From("user", User.Type).
+			Ref("shares").Unique(),
+		edge.From("file", File.Type).
+			Ref("shares").Unique(),
+	}
+}
+
+func (Share) Mixin() []ent.Mixin {
+	return []ent.Mixin{
+		CommonMixin{},
+	}
+}