feat(label): Add service to fetch labels

src/Label/LabelSearchResult.php

@@ -0,0 +1,93 @@
+<?php
+
+namespace JiraCloud\Label;
+
+use JiraCloud\ClassSerialize;
+use JiraCloud\DynamicPropertiesTrait;
+
+class LabelSearchResult implements \JsonSerializable
+{
+    use ClassSerialize;
+    use DynamicPropertiesTrait;
+
+    /**
+     * @var int
+     */
+    public $maxResults;
+
+    /**
+     * @var int
+     */
+    public $startAt;
+
+    /**
+     * @var int
+     */
+    public $total;
+
+    /**
+     * @var bool
+     */
+    public $isLast = false;
+
+    /**
+     * @var array
+     */
+    public $values;
+
+    #[\ReturnTypeWillChange]
+    public function jsonSerialize()
+    {
+        return array_filter(get_object_vars($this));
+    }
+
+    public function getMaxResults(): int
+    {
+        return $this->maxResults;
+    }
+
+    public function setMaxResults(int $maxResults): void
+    {
+        $this->maxResults = $maxResults;
+    }
+
+    public function getStartAt(): int
+    {
+        return $this->startAt;
+    }
+
+    public function setStartAt(int $startAt): void
+    {
+        $this->startAt = $startAt;
+    }
+
+    public function getTotal(): int
+    {
+        return $this->total;
+    }
+
+    public function setTotal(int $total): void
+    {
+        $this->total = $total;
+    }
+
+    public function isLast(): bool
+    {
+        return $this->isLast;
+    }
+
+    public function setIsLast(bool $isLast): void
+    {
+        $this->isLast = $isLast;
+    }
+
+    public function getValues(): array
+    {
+        return $this->values;
+    }
+
+    public function setValues(array $values): void
+    {
+        $this->values = $values;
+    }
+}

src/Label/LabelService.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace JiraCloud\Label;
+
+class LabelService extends \JiraCloud\JiraClient
+{
+    private $uri = '/label';
+
+    /**
+     * get all label list.
+     *
+     * @param array $paramArray
+     *
+     * @throws \JiraCloud\JiraException
+     *
+     * @return LabelSearchResult array of Label class
+     */
+    public function getAllLabels($paramArray = [])
+    {
+        $ret = $this->exec($this->uri.$this->toHttpQueryParameter($paramArray), null);
+
+        return $this->json_mapper->map(
+            json_decode($ret, false),
+            LabelSearchResult::class
+        );
+    }
+}