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render.go
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render.go
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package render
import (
"context"
"strings"
"github.com/henderiw/logger/log"
)
type Renderer interface {
Render(ctx context.Context, x any) (any, error)
}
func New(renderFn RenderFn, stringFn StringFn) Renderer {
return &commonRenderer{
RenderFn: renderFn,
StringFn: stringFn,
}
}
type RenderFn func(ctx context.Context, x any) (any, error)
type StringFn func(ctx context.Context, x string) (any, error)
type commonRenderer struct {
RenderFn func(ctx context.Context, x any) (any, error)
StringFn func(ctx context.Context, x string) (any, error)
}
func (r *commonRenderer) Render(ctx context.Context, x any) (any, error) {
log := log.FromContext(ctx)
var err error
switch x := x.(type) {
case map[string]any:
for k, v := range x {
if r.RenderFn != nil {
x[k], err = r.RenderFn(ctx, v)
if err != nil {
log.Debug("render map[string]any", "err", err.Error())
// this is to handle cell rendering
if strings.Contains(err.Error(), "no such key") || strings.Contains(err.Error(), "not found") {
delete(x, k)
continue
} else {
return nil, err
}
}
}
}
case []any:
newv := []any{}
for i, v := range x {
// rather then deleting the entry when the rendering failed harmlessly
// -> add the entry to a new list (newx)
if r.RenderFn != nil {
newx, err := r.RenderFn(ctx, v)
if err != nil {
log.Info("render []any", "err", err.Error())
if strings.Contains(err.Error(), "no such key") || strings.Contains(err.Error(), "not found") {
x[i] = nil
continue
} else {
return nil, err
}
}
newv = append(newv, newx)
}
}
return newv, nil
case string:
if r.StringFn != nil {
return r.StringFn(ctx, x)
}
default:
}
return x, nil
}