<?php

namespace local_treestudyplan;


class contextinfo {
    public $context;
    public function __construct($context){
        $this->context = $context;
    }

    public static function structure($value=VALUE_REQUIRED){
        return new \external_single_structure([
            "name" => new \external_value(PARAM_TEXT, 'context name'),
            "shortname" => new \external_value(PARAM_TEXT, 'context short name'),
            "path" => new \external_multiple_structure( new \external_value(PARAM_TEXT)),
            "shortpath" => new \external_multiple_structure( new \external_value(PARAM_TEXT)),
        ], 'context information', $value);
    }

    public function model() {
       
        $ctxPath = array_reverse($this->context->get_parent_context_ids(true));
        if(count($ctxPath) > 1 && $ctxPath[0] == 1) {
            array_shift($ctxPath);
        }
        return  [
            "name" => $this->context->get_context_name(false,false),
            "shortname" => $this->context->get_context_name(false,true),
            "path" => array_map(function($c){ return \context::instance_by_id($c)->get_context_name(false,false);},$ctxPath),
            "shortpath" => array_map(function($c){ return \context::instance_by_id($c)->get_context_name(false,true);},$ctxPath),
        ];
    }

    public static function by_id($contextid): self {
        return new self(self::context_by_id($contextid));
    }

    public static function context_by_id($contextid): \context {
        if($contextid <= 1){
            $contextid = 1;
        }
        return \context::instance_by_id($contextid);
    }


}