gosora/common/widget.go

166 lines
4.1 KiB
Go

package common
import (
"database/sql"
"encoding/json"
"strings"
"strconv"
"sync/atomic"
"github.com/Azareal/Gosora/query_gen"
)
type WidgetStmts struct {
//getList *sql.Stmt
getDockList *sql.Stmt
delete *sql.Stmt
create *sql.Stmt
update *sql.Stmt
//qgen.SimpleModel
}
var widgetStmts WidgetStmts
func init() {
DbInits.Add(func(acc *qgen.Accumulator) error {
w := "widgets"
widgetStmts = WidgetStmts{
//getList: acc.Select(w).Columns("wid, position, side, type, active, location, data").Orderby("position ASC").Prepare(),
getDockList: acc.Select(w).Columns("wid, position, type, active, location, data").Where("side = ?").Orderby("position ASC").Prepare(),
//model: acc.SimpleModel(w,"position,type,active,location,data","wid"),
delete: acc.Delete(w).Where("wid = ?").Prepare(),
create: acc.Insert(w).Columns("position, side, type, active, location, data").Fields("?,?,?,?,?,?").Prepare(),
update: acc.Update(w).Set("position = ?, side = ?, type = ?, active = ?, location = ?, data = ?").Where("wid = ?").Prepare(),
}
return acc.FirstError()
})
}
// TODO: Shrink this struct for common uses in the templates? Would that really make things go faster?
type Widget struct {
ID int
Enabled bool
Location string // Coming Soon: overview, topics, topic / topic_view, forums, forum, global
Position int
RawBody string
Body string
Side string
Type string
Literal bool
TickMask atomic.Value
InitFunc func(w *Widget, schedule *WidgetScheduler) error
ShutdownFunc func(w *Widget) error
BuildFunc func(w *Widget, hvars interface{}) (string, error)
TickFunc func(w *Widget) error
}
func (w *Widget) Delete() error {
_, err := widgetStmts.delete.Exec(w.ID)
if err != nil {
return err
}
// Reload the dock
// TODO: Better synchronisation
Widgets.delete(w.ID)
widgets, err := getDockWidgets(w.Side)
if err != nil {
return err
}
setDock(w.Side, widgets)
return nil
}
func (w *Widget) Copy() (owidget *Widget) {
owidget = &Widget{}
*owidget = *w
return owidget
}
// TODO: Test this
// TODO: Add support for zone:id. Perhaps, carry a ZoneID property around in *Header? It might allow some weirdness like frontend[5] which matches any zone with an ID of 5 but it would be a tad faster than verifying each zone, although it might be problematic if users end up relying on this behaviour for areas which don't pass IDs to the widgets system but *probably* should
// TODO: Add a selector which also matches topics inside a specific forum?
func (w *Widget) Allowed(zone string, zoneid int) bool {
for _, loc := range strings.Split(w.Location, "|") {
if len(loc) == 0 {
continue
}
sloc := strings.Split(":",loc)
if len(sloc) > 1 {
iloc, _ := strconv.Atoi(sloc[1])
if zoneid != 0 && iloc != zoneid {
continue
}
}
if loc == "global" || loc == zone {
return true
} else if loc[0] == '!' {
loc = loc[1:]
if loc != "global" && loc != zone {
return true
}
}
}
return false
}
// TODO: Refactor
func (w *Widget) Build(hvars interface{}) (string, error) {
if w.Literal {
return w.Body, nil
}
if w.BuildFunc != nil {
return w.BuildFunc(w, hvars)
}
header := hvars.(*Header)
err := header.Theme.RunTmpl(w.Body, hvars, header.Writer)
return "", err
}
type WidgetEdit struct {
*Widget
Data map[string]string
}
func (w *WidgetEdit) Create() (int, error) {
data, err := json.Marshal(w.Data)
if err != nil {
return 0, err
}
res, err := widgetStmts.create.Exec(w.Position, w.Side, w.Type, w.Enabled, w.Location, data)
if err != nil {
return 0, err
}
// Reload the dock
widgets, err := getDockWidgets(w.Side)
if err != nil {
return 0, err
}
setDock(w.Side, widgets)
wid64, err := res.LastInsertId()
return int(wid64), err
}
func (w *WidgetEdit) Commit() error {
data, err := json.Marshal(w.Data)
if err != nil {
return err
}
_, err = widgetStmts.update.Exec(w.Position, w.Side, w.Type, w.Enabled, w.Location, data, w.ID)
if err != nil {
return err
}
// Reload the dock
widgets, err := getDockWidgets(w.Side)
if err != nil {
return err
}
setDock(w.Side, widgets)
return nil
}