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<?php
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/**
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *
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 * This software consists of voluntary contributions made by many individuals
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 * and is licensed under the LGPL. For more information please see
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 * <http://phing.info>.
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 */
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/**
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 * This selector is here just to shake up your thinking a bit. Don't get
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 * too caught up in boolean, there are other ways you can evaluate a
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 * collection of selectors. This one takes a vote of the selectors it
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 * contains, and majority wins. You could also have an "all-but-one"
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 * selector, a "weighted-average" selector, and so on. These are left
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 * as exercises for the reader (as are the usecases where this would
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 * be necessary).
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 *
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 * @author  Hans Lellelid <hans@xmpl.org> (Phing)
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 * @author  Bruce Atherton <bruce@callenish.com> (Ant)
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 * @package phing.types.selectors
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 */
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class MajoritySelector extends BaseSelectorContainer
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{
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    private $allowtie = true;
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    /**
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     * @return string
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     */
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    public function __toString()
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    {
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        $buf = "";
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        if ($this->hasSelectors()) {
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            $buf .= "{majorityselect: ";
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            $buf .= parent::__toString();
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            $buf .= "}";
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        }
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        return $buf;
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    }
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    /**
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     * @param $tiebreaker
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     */
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    public function setAllowtie($tiebreaker)
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    {
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        $this->allowtie = $tiebreaker;
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    }
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    /**
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     * Returns true (the file is selected) if most of the other selectors
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     * agree. In case of a tie, go by the allowtie setting. That defaults
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     * to true, meaning in case of a tie, the file is selected.
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     *
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     * @param  PhingFile $basedir the base directory the scan is being done from
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     * @param  string $filename is the name of the file to check
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     * @param  PhingFile $file is a PhingFile object for the filename that the selector
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     *                            can use
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     * @return bool whether the file should be selected or not
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     */
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    public function isSelected(PhingFile $basedir, $filename, PhingFile $file)
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    {
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        $this->validate();
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        $yesvotes = 0;
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        $novotes = 0;
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        $selectors = $this->selectorElements();
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        for ($i = 0, $size = count($selectors); $i < $size; $i++) {
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            $result = $selectors[$i]->isSelected($basedir, $filename, $file);
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            if ($result) {
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                ++$yesvotes;
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            } else {
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                ++$novotes;
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            }
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        }
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        if ($yesvotes > $novotes) {
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            return true;
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        }
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        if ($novotes > $yesvotes) {
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            return false;
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        }
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        // At this point, we know we have a tie.
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        return $this->allowtie;
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    }
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}

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