Add poll system for Patrons Circle

lib/Poll.php

@@ -0,0 +1,88 @@
+<?
+use Safe\DateTime;
+use function Safe\usort;
+
+class Poll extends PropertiesBase{
+	public $PollId;
+	public $Name;
+	public $UrlName;
+	public $Description;
+	public $Created;
+	public $Start;
+	public $End;
+	protected $Url = null;
+	protected $PollItems = null;
+	protected $PollItemsByWinner = null;
+	protected $VoteCount = null;
+
+	protected function GetUrl(): string{
+		if($this->Url === null){
+			$this->Url = '/patrons-circle/polls/' . $this->UrlName;
+		}
+
+		return $this->Url;
+	}
+
+	protected function GetVoteCount(): int{
+		if($this->VoteCount === null){
+			$this->VoteCount = (Db::Query('select count(*) as VoteCount from Votes v inner join PollItems pi on v.PollItemId = pi.PollItemId where pi.PollId = ?', [$this->PollId]))[0]->VoteCount;
+		}
+
+		return $this->VoteCount;
+	}
+
+	/**
+	 * @return array<PollItem>
+	 */
+	protected function GetPollItems(): array{
+		if($this->PollItems === null){
+			$this->PollItems = Db::Query('SELECT * from PollItems where PollId = ? order by SortOrder asc', [$this->PollId], 'PollItem');
+		}
+
+		return $this->PollItems;
+	}
+
+	/**
+	 * @return array<PollItem>
+	 */
+	protected function GetPollItemsByWinner(): array{
+		if($this->PollItemsByWinner === null){
+			$this->__get('PollItems');
+			$this->PollItemsByWinner = $this->PollItems;
+			usort($this->PollItemsByWinner, function(PollItem $a, PollItem $b){ return $a->VoteCount <=> $b->VoteCount; });
+
+			$this->PollItemsByWinner = array_reverse($this->PollItemsByWinner);
+		}
+
+		return $this->PollItemsByWinner;
+	}
+
+	public function IsActive(): bool{
+		$now = new DateTime();
+		if( ($this->Start !== null && $this->Start > $now) || ($this->End !== null && $this->End < $now)){
+			return false;
+		}
+
+		return true;
+	}
+
+	public static function Get(?int $pollId): Poll{
+		$result = Db::Query('SELECT * from Polls where PollId = ?', [$pollId], 'Poll');
+
+		if(sizeof($result) == 0){
+			throw new Exceptions\InvalidPollException();
+		}
+
+		return $result[0];
+	}
+
+	public static function GetByUrlName(?string $urlName): Poll{
+		$result = Db::Query('SELECT * from Polls where UrlName = ?', [$urlName], 'Poll');
+
+		if(sizeof($result) == 0){
+			throw new Exceptions\InvalidPollException();
+		}
+
+		return $result[0];
+	}
+}