module clixon-autocli{
    yang-version 1.1;
    namespace "http://clicon.org/autocli";
    prefix autocli;

    organization
        "Clicon / Clixon";

    contact
        "Olof Hagsand <olof@hagsand.se>";

    description
        "Clixon CLIgen specification declarations, including autocli.
         Design inspired by ietf-netconf-acm.yang
      
       ***** BEGIN LICENSE BLOCK *****
       Copyright (C) 2020-2021 Olof Hagsand and Rubicon Communications, LLC(Netgate)
       
       This file is part of CLIXON

       Licensed under the Apache License, Version 2.0 (the \"License\");
       you may not use this file except in compliance with the License.
       You may obtain a copy of the License at
            http://www.apache.org/licenses/LICENSE-2.0
       Unless required by applicable law or agreed to in writing, software
       distributed under the License is distributed on an \"AS IS\" BASIS,
       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       See the License for the specific language governing permissions and
       limitations under the License.

       Alternatively, the contents of this file may be used under the terms of
       the GNU General Public License Version 3 or later (the \"GPL\"),
       in which case the provisions of the GPL are applicable instead
       of those above. If you wish to allow use of your version of this file only
       under the terms of the GPL, and not to allow others to
       use your version of this file under the terms of Apache License version 2, 
       indicate your decision by deleting the provisions above and replace them with
       the notice and other provisions required by the GPL. If you do not delete
       the provisions above, a recipient may use your version of this file under
       the terms of any one of the Apache License version 2 or the GPL.

       ***** END LICENSE BLOCK *****";

    revision 2022-02-11 {
        description
            "Initial version
             Released in Clixon 5.6";
    }
    revision 2021-12-05 {
        description
            "Initial version
             Released in Clixon 5.5";
    }
    extension hide {
        description 
            "Modify the autocli by hiding the command associated with a YANG node and its 
             sub-commands.
             The command is active but not shown by ? or TAB. In other words, it hides the
             auto-completion of commands";
    }
    extension hide-show {
        description 
            "Modify the autocli by hiding the command associated with a YANG node and its 
             sub-commands in CLI show commands.";
    }
    extension strict-expand  {
        description 
            "Modify the autocli by only showing exactly the expanded values of a variable.
             It should not be possible to add a new value that is not in the expanded list.";
    }
    typedef autocli-op {
        description
            "Autocli rule-type operation, each rule use different fields as 
             described in the individual enums below.";
        type enumeration {
            enum enable {
                description
                    "Include a complete subtree to rendering of autocli. 
                     Example: 
                        <module-default>false</module-default>
                        <rule>
                           <name>wifi</name>
                           <operation>enable</operation>
                           <module-name>openconfig-wifi</module-name>
                        </rule>
                     Only on module-level and if module-default is false,
                     Rule fields used: module-name";
            }
            enum compress {
                description
                "Skip a keyword from a command.
                 Keep the command, only make it shorter by omitting a part.
                 Example: compress containers if single list child
                        <rule>
                           <name>container compress</name>
                           <operation>compress</operation>
                           <yang-keyword>container</yang-keyword>
                           <yang-keyword-child>list</yang-keyword-child>
                        </rule>
                 Rule fields used: 
                    module-name, yang-keyword, schema-nodeid, yang-keyword-child, extension";
            }
            enum edit-mode {
                description
                    "Autocli CLI edit modes for YANG symbols.
                     For example, 
                         edit interface eth0<CR> 
                     enters a new mode with local context.";
            }
        }
    }
    typedef list-keyword-type {
        description
            "Autocli CLI keyword behaviour in YANG lists. 
             With 'keyword' is meant CLIgen 'constants' rather than 'variables'.
             Assume a YANG LIST: list a{ key x; leaf x; leaf y;} and how to generate
             the autocli";
        type enumeration {
            enum kw-none{
                description "No extra keywords, only variables: a <x> <y>";
            }
            enum kw-nokey{
                description "Keywords on non-key variables: a <x> y <y>";
            }
            enum kw-all{
                description "Keywords on all variables: a x <x> y <y>";
            }
        }
    }
    typedef yang-keywords {
       type bits {
           bit list; 
           bit listall{ /* NYI */
               description
                   "Variant of list encompassing all list entries, not just an instance";
           }
           bit container;
           bit leaf; /* Also leaf-list (NYI) */
       }
    }
    grouping clixon-autocli{
        /* options */
        leaf module-default {
            description
                "Include YANG modules for generation of autocli.
                 If true, all modules with a top-level datanode are generated, ie
                 they get a top-level entry in the @basemodel tree.
                 If false, you need to explicitly enable modules for autocli generation
                 using 'enable' rules";
            type boolean;
            default true;
        }
        leaf list-keyword-default {
            description
                "Autocli CLI keyword behaviour in YANG lists.";
            type list-keyword-type;
            default kw-nokey;
        }
        leaf treeref-state-default {
            description
                "If 'true', generate CLI from YANG state/non-config statements as well, not only config data. 
                 Many specs have very large state parts, for example openconfig has ca 10 times
                 larger state than config parts, see for example openconfig-isis.yang.";
            type boolean;
            default false;
        }
        leaf edit-mode-default {
            description
                "Open automatic edit-modes for some YANG keywords and do not allow others.
                 A CLI edit mode opens a carriage-return option and changes the context to be 
                 in that local context.
                 For example:  
                    cli> interfaces interface e0<cr>
                    eth0> 
                 Default is to generate edit-modes for all containers and lists.";
            type yang-keywords;
            default "list container";
        }
        leaf completion-default {
            description
                "Generate code for CLI completion of existing db symbols. 
                 That is, check existing configure database for completion options.
                 This is normally always enabled.";
            type boolean;
            default true;
        }
        /* rules */
        list rule {
            description
                "Represents a modification rule of a clixon clispec.";
            key name;
            leaf name {
                description
                    "Arbitrary name assigned for the rule, must be unique";
                type string;
            }
            leaf description {
                description
                    "Rule description";
                type string;
            }
            leaf operation {
                description "Rule operation";
                type autocli-op;
            }
            leaf module-name {
                description
                    "Name of the module associated with this rule.
                     Wildchars '*' and '?' can be used (glob pattern).
                     Revision and yang suffix are omitted
                     Example: 'openconfig-*'";
                type string;
            }
            leaf yang-keyword {
                description
                    "If present identifes a YANG keyword which the rule applies to
                     Example: 'container'
                     ";
                type string;
            }
            leaf schema-nodeid {
                description
                    "path in the form of /<id>/<id> or just a single <id> identifying a YANG
                     schema-node identifier as defined in RFC 7950 Sec 6.5
                     Example: 'config', '/interfaces/interface'";
                type string;
            }
            leaf yang-keyword-child {
                description
                    "The YANG statement has a single child, and the yang type of the child is the
                     value of this option
                     A (maybe too) specific property to cover openconfig compressions
                     as defined here:
                     https://github.com/openconfig/ygot/blob/master/docs/design.md#openconfig-path-compression";
                type string;
            }
            leaf extension {
                /* Consider making this a container with name/module/value instead */
                description
                    "The extension is set either in the node itself, or in this module
                     Extension prefix must be set
                     Example: oc-ext:openconfig-version";
                type string;
            }
        }
    }
}