salix/namespace.go

110 lines
2.6 KiB
Go

/*
* Salix - Go templating engine
* Copyright (C) 2023 Elara Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package salix
import "sync"
// Namespace represents a collection of templates that can include each other
type Namespace struct {
mu sync.Mutex
tmpls map[string]Template
vars map[string]any
tags map[string]Tag
escapeHTML *bool
}
// New returns a new template namespace
func New() *Namespace {
return &Namespace{
tmpls: map[string]Template{},
vars: map[string]any{},
tags: map[string]Tag{},
}
}
// WithVarMap sets the namespace's variable map to m
func (n *Namespace) WithVarMap(m map[string]any) *Namespace {
n.mu.Lock()
defer n.mu.Unlock()
if m == nil {
n.vars = map[string]any{}
} else {
n.vars = m
}
return n
}
// WithTagMap sets the namespace's tag map to m
func (n *Namespace) WithTagMap(m map[string]Tag) *Namespace {
n.mu.Lock()
defer n.mu.Unlock()
if m == nil {
n.tags = map[string]Tag{}
} else {
n.tags = m
}
return n
}
// WithVarMap turns HTML escaping on or off for the namespace
func (n *Namespace) WithEscapeHTML(b bool) *Namespace {
n.mu.Lock()
defer n.mu.Unlock()
n.escapeHTML = &b
return n
}
// GetTemplate tries to get a template from the namespace's template map.
// If it finds the template, it returns the template and true. If it
// doesn't find it, it returns nil and false.
func (n *Namespace) GetTemplate(name string) (Template, bool) {
n.mu.Lock()
defer n.mu.Unlock()
t, ok := n.tmpls[name]
return t, ok
}
// getVar tries to get a variable from the namespace's variable map
func (n *Namespace) getVar(name string) (any, bool) {
n.mu.Lock()
defer n.mu.Unlock()
v, ok := n.vars[name]
return v, ok
}
// getTag tries to get a tag from the namespace's tag map
func (n *Namespace) getTag(name string) (Tag, bool) {
n.mu.Lock()
defer n.mu.Unlock()
t, ok := n.tags[name]
return t, ok
}
// getEscapeHTML returns the namespace's escapeHTML value
func (n *Namespace) getEscapeHTML() *bool {
n.mu.Lock()
defer n.mu.Unlock()
return n.escapeHTML
}