Модуль ns_captionkey для AOL Server

Описание модуля приведено в комментарии в коде.

#    Copyright 2009, Mobile Business Group
#    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 require json

# простой интерфейс для управления заголовками
# проверки аргументов убраны, т.к. это лишний оверхед, а функции вызываются очень часто
proc ns_captionkey {action args} {
    if {$action eq {exists}} {
        return [nsv_exists captionkeys[lindex $args 0] [lindex $args 1]]
    } elseif {$action eq {names}} {
        return [nsv_array names captionkeys[lindex $args 0]]
    } elseif {$action eq {get_escape}} {
        return [::json::string_escape [ns_captionkey get {*}$args]]
    } elseif {$action eq {get}} {
        # можно указывать список юнитов, поиск ведется последовательно
        if {[lindex $args 0] eq {}} {
            if {[nsv_exists captionkeys[lindex $args 0] [lindex $args 1]] == 1} {
                return [nsv_get captionkeys[lindex $args 0] [lindex $args 1]]
            }
        }
        foreach name [lindex $args 0] {
            if {[nsv_exists captionkeys$name [lindex $args 1]] == 1} {
                return [nsv_get captionkeys$name [lindex $args 1]]
            }
        }
        # ключ не найден, возвращаем имя ключа
        return [lindex $args 1]
    } elseif {$action eq {set}} {
        nsv_set captionkeys[lindex $args 0] [lindex $args 1] [lindex $args 2]
        return [lindex $args 2]
    } elseif {$action eq {lappend}} {
        # append data to list
        nsv_lappend captionkeys[lindex $args 0] [lindex $args 1] [lindex $args 2]
        return [nsv_get captionkeys[lindex $args 0] [lindex $args 1]]
    } elseif {$action eq {aset}} {
        nsv_array set captionkeys[lindex $args 0] [lindex $args 1]
    } elseif {$action eq {aget}} {
        return [nsv_array get captionkeys[lindex $args 0]]
    }
}