forked from ungerik/go-start
/
modeliteratorview.go
54 lines (48 loc) · 1.34 KB
/
modeliteratorview.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
package view
import (
"github.com/ungerik/go-start/model"
// "github.com/ungerik/go-start/utils"
)
///////////////////////////////////////////////////////////////////////////////
// ModelIteratorView
type GetModelIteratorFunc func(ctx *Context) model.Iterator
type GetModelIteratorViewFunc func(ctx *Context, model interface{}) (view View, err error)
func ModelIterator(iter model.Iterator) GetModelIteratorFunc {
return func(ctx *Context) model.Iterator {
return iter
}
}
type ModelIteratorView struct {
ViewBase
GetModelIterator GetModelIteratorFunc
// GetModel returns the model used GetModelIteratorView.
// Only return the same object if you know exactly what you are doing.
// To be on the safe side, return a new model instance at every call.
GetModel func(ctx *Context) (model interface{}, err error)
GetModelView GetModelIteratorViewFunc // nil Views will be ignored
}
func (self *ModelIteratorView) Render(ctx *Context) (err error) {
iter := self.GetModelIterator(ctx)
model, err := self.GetModel(ctx)
if err != nil {
return err
}
for iter.Next(model) {
view, err := self.GetModelView(ctx, model)
if err != nil {
return err
}
if view != nil {
view.Init(view)
err = view.Render(ctx)
if err != nil {
return err
}
}
model, err = self.GetModel(ctx)
if err != nil {
return err
}
}
return iter.Err()
}