138 lines
2.8 KiB
Go
138 lines
2.8 KiB
Go
// Copyright © 2016 Abcum Ltd
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package db
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/abcum/surreal/sql"
|
|
"github.com/abcum/surreal/util/data"
|
|
)
|
|
|
|
// Lives checks if any table views are specified for
|
|
// this table, and executes them in name order.
|
|
func (d *document) lives(ctx context.Context, when method) (err error) {
|
|
|
|
// If this document has not changed
|
|
// then there is no need to update
|
|
// any registered live queries.
|
|
|
|
if !d.changed() {
|
|
return nil
|
|
}
|
|
|
|
// Get the foreign read-only tables
|
|
// specified for this table, and
|
|
// update values which have changed.
|
|
|
|
lvs, err := d.getLV()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(lvs) > 0 {
|
|
|
|
for _, lv := range lvs {
|
|
|
|
var ok bool
|
|
var con *socket
|
|
var doc *data.Doc
|
|
|
|
if con, ok = sockets[lv.FB]; ok {
|
|
|
|
ctx = con.ctx()
|
|
|
|
// Check whether this live query has the
|
|
// necessary permissions to view this
|
|
// document, or continue to the next query.
|
|
|
|
ok, err = d.grant(ctx, when)
|
|
if err != nil {
|
|
continue
|
|
} else if !ok {
|
|
continue
|
|
}
|
|
|
|
// Check whether this document matches the
|
|
// filter conditions for the live query and
|
|
// if not, then continue to the next query.
|
|
|
|
ok, err = d.check(ctx, lv.Cond)
|
|
if err != nil {
|
|
continue
|
|
} else if !ok {
|
|
continue
|
|
}
|
|
|
|
switch lv.Diff {
|
|
|
|
// If the live query has specified to only
|
|
// receive diff changes, then there will be
|
|
// no project fields for this query.
|
|
|
|
case true:
|
|
|
|
doc = d.diff()
|
|
|
|
// If the query has project fields which it
|
|
// wants to receive, then let's fetch thses
|
|
// fields, and return them to the socket.
|
|
|
|
case false:
|
|
|
|
for _, v := range lv.Expr {
|
|
if _, ok := v.Expr.(*sql.All); ok {
|
|
doc = d.current
|
|
break
|
|
}
|
|
}
|
|
|
|
if doc == nil {
|
|
doc = data.New()
|
|
}
|
|
|
|
for _, e := range lv.Expr {
|
|
switch v := e.Expr.(type) {
|
|
case *sql.All:
|
|
break
|
|
default:
|
|
v, err := d.i.e.fetch(ctx, v, d.current)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
doc.Set(v, e.Field)
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
switch when {
|
|
case _CREATE:
|
|
con.queue(lv.ID, "CREATE", doc.Data())
|
|
case _UPDATE:
|
|
con.queue(lv.ID, "UPDATE", doc.Data())
|
|
case _DELETE:
|
|
con.queue(lv.ID, "DELETE", d.id)
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return
|
|
|
|
}
|