72 lines
2.2 KiB
PHP
72 lines
2.2 KiB
PHP
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<?php
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namespace nur\config;
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use nur\A;
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use nur\b\ValueException;
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use nur\str;
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/**
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* Class Ref: une référence à une clé de configuration
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*
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* La référence peut être relative, e.g '..x.y' qui correspond à 'a.b.x.y' si
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* la référence est située au chemin de clé 'a.b.w.t' (le nombre de '.' au
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* début indique le nombre d'éléments de chemin à enlever)
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*/
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class Ref {
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/** @var string */
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public $pkey;
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/** @var array */
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public $merge;
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/** @var array */
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public $appends;
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/** @var array */
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public $prepends;
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function __construct(string $pkey) {
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$this->pkey = $pkey;
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}
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/** calculer le chemin effectif à partir du chemin relative $pkey */
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static final function abs_pkey(string $rel_pkey, string $base_pkey): string {
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if (substr($rel_pkey, 0, 1) == ".") {
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$base = explode(".", $base_pkey);
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## c'est un chemin relatif
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$parts = $rel_pkey;
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# monter
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while ($parts != "" && substr($parts, 0, 1) == ".") {
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A::del($base, count($base) - 1);
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$parts = substr($parts, 1);
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}
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# puis descendre
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$parts = explode(".", $parts);
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A::merge($base, $parts);
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$pkey = implode(".", $base);
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} else {
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## c'est un chemin absolu
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$pkey = $rel_pkey;
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}
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if ($pkey == $base_pkey) {
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throw new ValueException("rel_pkey($rel_pkey) must be different of $base_pkey");
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} elseif (str::starts_with("$base_pkey.", $pkey)) {
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throw new ValueException("rel_pkey($rel_pkey) shall not be a child of $base_pkey");
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} elseif (str::starts_with("$pkey.", $base_pkey)) {
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throw new ValueException("rel_pkey($rel_pkey) shall not be a direct parent of $base_pkey");
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}
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return $pkey;
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}
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/** résoudre cette référence, qui est située au chemin $pkey */
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function resolve(IConfigManager $cm, string $base_pkey, string $profile) {
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$abs_pkey = $this->abs_pkey($this->pkey, $base_pkey);
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$value = $cm->getValue($abs_pkey, null, $profile);
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if ($this->merge !== null) A::merge($value, $this->merge);
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if ($this->appends !== null) A::merge($value, $this->appends);
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if ($this->prepends !== null) {
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$prepends = $this->prepends;
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A::merge($prepends, $value);
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$value = $prepends;
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}
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return $value;
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}
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}
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