// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
// All rights reserved.

// function-register.go
package expr

import (
	"path/filepath"
)

var functionRegister map[string]func(ExprContext)

func registerImport(name string, importFunc func(ExprContext)) {
	if functionRegister == nil {
		functionRegister = make(map[string]func(ExprContext))
	}
	functionRegister[name] = importFunc
}

func ImportInContext(ctx ExprContext, name string) (exists bool) {
	var importFunc func(ExprContext)
	if importFunc, exists = functionRegister[name]; exists {
		importFunc(ctx)
	}
	return
}

func ImportInContextByGlobPattern(ctx ExprContext, pattern string) (count int, err error) {
	var matched bool
	for name, importFunc := range functionRegister {
		if matched, err = filepath.Match(pattern, name); err == nil {
			if matched {
				count++
				importFunc(ctx)
			}
		} else {
			break
		}
	}
	return
}

func init() {
	if functionRegister == nil {
		functionRegister = make(map[string]func(ExprContext))
	}
}