48 lines
830 B
Go
48 lines
830 B
Go
package salix
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"go.elara.ws/salix/ast"
|
|
)
|
|
|
|
var (
|
|
ErrMacroInvalidArgs = errors.New("macro expects one string argument")
|
|
ErrNoSuchMacro = errors.New("no such template")
|
|
)
|
|
|
|
// macroTag represents an #macro tag within a Salix template
|
|
type macroTag struct{}
|
|
|
|
func (mt macroTag) Run(tc *TagContext, block, args []ast.Node) error {
|
|
if len(args) != 1 {
|
|
return ErrMacroInvalidArgs
|
|
}
|
|
|
|
nameVal, err := tc.GetValue(args[0], nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
name, ok := nameVal.(string)
|
|
if !ok {
|
|
return ErrMacroInvalidArgs
|
|
}
|
|
|
|
if len(block) == 0 {
|
|
tc.t.ns.mu.Lock()
|
|
macro, ok := tc.t.ns.macros[name]
|
|
if !ok {
|
|
return ErrNoSuchMacro
|
|
}
|
|
tc.t.ns.mu.Unlock()
|
|
return tc.Execute(macro, nil)
|
|
} else {
|
|
tc.t.ns.mu.Lock()
|
|
tc.t.ns.macros[name] = block
|
|
tc.t.ns.mu.Unlock()
|
|
}
|
|
|
|
return nil
|
|
}
|