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<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2013 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category	PHPExcel
 * @package		PHPExcel_Reader_Excel2007
 * @copyright	Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license		http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version		1.7.9, 2013-06-02
 */

/**
 * PHPExcel_Reader_Excel2007_Chart
 *
 * @category	PHPExcel
 * @package		PHPExcel_Reader_Excel2007
 * @copyright	Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Reader_Excel2007_Chart
{
	private static function _getAttribute($component, $name, $format) {
		$attributes = $component->attributes();
		if (isset($attributes[$name])) {
			if ($format == 'string') {
				return (string) $attributes[$name];
			} elseif ($format == 'integer') {
				return (integer) $attributes[$name];
			} elseif ($format == 'boolean') {
				return (boolean) ($attributes[$name] === '0' || $attributes[$name] !== 'true') ? false : true;
			} else {
				return (float) $attributes[$name];
			}
		}
		return null;
	}	//	function _getAttribute()


	private static function _readColor($color,$background=false) {
		if (isset($color["rgb"])) {
			return (string)$color["rgb"];
		} else if (isset($color["indexed"])) {
			return PHPExcel_Style_Color::indexedColor($color["indexed"]-7,$background)->getARGB();
		}
	}


	public static function readChart($chartElements,$chartName) {
		$namespacesChartMeta = $chartElements->getNamespaces(true);
		$chartElementsC = $chartElements->children($namespacesChartMeta['c']);

		$XaxisLabel = $YaxisLabel = $legend = $title = NULL;
		$dispBlanksAs = $plotVisOnly = NULL;

		foreach($chartElementsC as $chartElementKey => $chartElement) {
			switch ($chartElementKey) {
				case "chart":
					foreach($chartElement as $chartDetailsKey => $chartDetails) {
						$chartDetailsC = $chartDetails->children($namespacesChartMeta['c']);
						switch ($chartDetailsKey) {
							case "plotArea":
									$plotAreaLayout = $XaxisLable = $YaxisLable = null;
									$plotSeries = $plotAttributes = array();
									foreach($chartDetails as $chartDetailKey => $chartDetail) {
										switch ($chartDetailKey) {
											case "layout":
												$plotAreaLayout = self::_chartLayoutDetails($chartDetail,$namespacesChartMeta,'plotArea');
												break;
											case "catAx":
												if (isset($chartDetail->title)) {
													$XaxisLabel = self::_chartTitle($chartDetail->title->children($namespacesChartMeta['c']),$namespacesChartMeta,'cat');
												}
												break;
											case "dateAx":
												if (isset($chartDetail->title)) {
													$XaxisLabel = self::_chartTitle($chartDetail->title->children($namespacesChartMeta['c']),$namespacesChartMeta,'cat');
												}
												break;
											case "valAx":
												if (isset($chartDetail->title)) {
													$YaxisLabel = self::_chartTitle($chartDetail->title->children($namespacesChartMeta['c']),$namespacesChartMeta,'cat');
												}
												break;
											case "barChart":
											case "bar3DChart":
												$barDirection = self::_getAttribute($chartDetail->barDir, 'val', 'string');
												$plotSer = self::_chartDataSeries($chartDetail,$namespacesChartMeta,$chartDetailKey);
												$plotSer->setPlotDirection($barDirection);
												$plotSeries[] = $plotSer;
												$plotAttributes = self::_readChartAttributes($chartDetail);
												break;
											case "lineChart":
											case "line3DChart":
												$plotSeries[] = self::_chartDataSeries($chartDetail,$namespacesChartMeta,$chartDetailKey);
												$plotAttributes = self::_readChartAttributes($chartDetail);
												break;
											case "areaChart":
											case "area3DChart":
												$plotSeries[] = self::_chartDataSeries($chartDetail,$namespacesChartMeta,$chartDetailKey);
												$plotAttributes = self::_readChartAttributes($chartDetail);
												break;
											case "doughnutChart":
											case "pieChart":
											case "pie3DChart":
												$explosion = isset($chartDetail->ser->explosion);
												$plotSer = self::_chartDataSeries($chartDetail,$namespacesChartMeta,$chartDetailKey);
												$plotSer->setPlotStyle($explosion);
												$plotSeries[] = $plotSer;
												$plotAttributes = self::_readChartAttributes($chartDetail);
												break;
											case "scatterChart":
												$scatterStyle = self::_getAttribute($chartDetail->scatterStyle, 'val', 'string');
												$plotSer = self::_chartDataSeries($chartDetail,$namespacesChartMeta,$chartDetailKey);
												$plotSer->setPlotStyle($scatterStyle);
												$plotSeries[] = $plotSer;
												$plotAttributes = self::_readChartAttributes($chartDetail);
												break;
											case "bubbleChart":
												$bubbleScale = self::_getAttribute($chartDetail->bubbleScale, 'val', 'integer');
												$plotSer = self::_chartDataSeries($chartDetail,$namespacesChartMeta,$chartDetailKey);
												$plotSer->setPlotStyle($bubbleScale);
												$plotSeries[] = $plotSer;
												$plotAttributes = self::_readChartAttributes($chartDetail);
												break;
											case "radarChart":
												$radarStyle = self::_getAttribute($chartDetail->radarStyle, 'val', 'string');
												$plotSer = self::_chartDataSeries($chartDetail,$namespacesChartMeta,$chartDetailKey);
												$plotSer->setPlotStyle($radarStyle);
												$plotSeries[] = $plotSer;
												$plotAttributes = self::_readChartAttributes($chartDetail);
												break;
											case "surfaceChart":
											case "surface3DChart":
												$wireFrame = self::_getAttribute($chartDetail->wireframe, 'val', 'boolean');
												$plotSer = self::_chartDataSeries($chartDetail,$namespacesChartMeta,$chartDetailKey);
												$plotSer->setPlotStyle($wireFrame);
												$plotSeries[] = $plotSer;
												$plotAttributes = self::_readChartAttributes($chartDetail);
												break;
											case "stockChart":
												$plotSeries[] = self::_chartDataSeries($chartDetail,$namespacesChartMeta,$chartDetailKey);
												$plotAttributes = self::_readChartAttributes($plotAreaLayout);
												break;
										}
									}
									if ($plotAreaLayout == NULL) {
										$plotAreaLayout = new PHPExcel_Chart_Layout();
									}
									$plotArea = new PHPExcel_Chart_PlotArea($plotAreaLayout,$plotSeries);
									self::_setChartAttributes($plotAreaLayout,$plotAttributes);
									break;
							case "plotVisOnly":
									$plotVisOnly = self::_getAttribute($chartDetails, 'val', 'string');
									break;
							case "dispBlanksAs":
									$dispBlanksAs = self::_getAttribute($chartDetails, 'val', 'string');
									break;
							case "title":
									$title = self::_chartTitle($chartDetails,$namespacesChartMeta,'title');
									break;
							case "legend":
									$legendPos = 'r';
									$legendLayout = null;
									$legendOverlay = false;
									foreach($chartDetails as $chartDetailKey => $chartDetail) {
										switch ($chartDetailKey) {
											case "legendPos":
												$legendPos = self::_getAttribute($chartDetail, 'val', 'string');
												break;
											case "overlay":
												$legendOverlay = self::_getAttribute($chartDetail, 'val', 'boolean');
												break;
											case "layout":
												$legendLayout = self::_chartLayoutDetails($chartDetail,$namespacesChartMeta,'legend');
												break;
										}
									}
									$legend = new PHPExcel_Chart_Legend($legendPos, $legendLayout, $legendOverlay);
									break;
						}
					}
			}
		}
		$chart = new PHPExcel_Chart($chartName,$title,$legend,$plotArea,$plotVisOnly,$dispBlanksAs,$XaxisLabel,$YaxisLabel);

		return $chart;
	}	//	function readChart()


	private static function _chartTitle($titleDetails,$namespacesChartMeta,$type) {
		$caption = array();
		$titleLayout = null;
		foreach($titleDetails as $titleDetailKey => $chartDetail) {
			switch ($titleDetailKey) {
				case "tx":
					$titleDetails = $chartDetail->rich->children($namespacesChartMeta['a']);
					foreach($titleDetails as $titleKey => $titleDetail) {
						switch ($titleKey) {
							case "p":
								$titleDetailPart = $titleDetail->children($namespacesChartMeta['a']);
								$caption[] = self::_parseRichText($titleDetailPart);
						}
					}
					break;
				case "layout":
					$titleLayout = self::_chartLayoutDetails($chartDetail,$namespacesChartMeta);
					break;
			}
		}

		return new PHPExcel_Chart_Title($caption, $titleLayout);
	}	//	function _chartTitle()


	private static function _chartLayoutDetails($chartDetail,$namespacesChartMeta) {
		if (!isset($chartDetail->manualLayout)) {
			return null;
		}
		$details = $chartDetail->manualLayout->children($namespacesChartMeta['c']);
		if (is_null($details)) {
			return null;
		}
		$layout = array();
		foreach($details as $detailKey => $detail) {
//			echo $detailKey,' => ',self::_getAttribute($detail, 'val', 'string'),PHP_EOL;
			$layout[$detailKey] = self::_getAttribute($detail, 'val', 'string');
		}
		return new PHPExcel_Chart_Layout($layout);
	}	//	function _chartLayoutDetails()


	private static function _chartDataSeries($chartDetail,$namespacesChartMeta,$plotType) {
		$multiSeriesType = NULL;
		$smoothLine = false;
		$seriesLabel = $seriesCategory = $seriesValues = $plotOrder = array();

		$seriesDetailSet = $chartDetail->children($namespacesChartMeta['c']);
		foreach($seriesDetailSet as $seriesDetailKey => $seriesDetails) {
			switch ($seriesDetailKey) {
				case "grouping":
					$multiSeriesType = self::_getAttribute($chartDetail->grouping, 'val', 'string');
					break;
				case "ser":
					$marker = NULL;
					foreach($seriesDetails as $seriesKey => $seriesDetail) {
						switch ($seriesKey) {
							case "idx":
								$seriesIndex = self::_getAttribute($seriesDetail, 'val', 'integer');
								break;
							case "order":
								$seriesOrder = self::_getAttribute($seriesDetail, 'val', 'integer');
								$plotOrder[$seriesIndex] = $seriesOrder;
								break;
							case "tx":
								$seriesLabel[$seriesIndex] = self::_chartDataSeriesValueSet($seriesDetail,$namespacesChartMeta);
								break;
							case "marker":
								$marker = self::_getAttribute($seriesDetail->symbol, 'val', 'string');
								break;
							case "smooth":
								$smoothLine = self::_getAttribute($seriesDetail, 'val', 'boolean');
								break;
							case "cat":
								$seriesCategory[$seriesIndex] = self::_chartDataSeriesValueSet($seriesDetail,$namespacesChartMeta);
								break;
							case "val":
								$seriesValues[$seriesIndex] = self::_chartDataSeriesValueSet($seriesDetail,$namespacesChartMeta,$marker);
								break;
							case "xVal":
								$seriesCategory[$seriesIndex] = self::_chartDataSeriesValueSet($seriesDetail,$namespacesChartMeta,$marker);
								break;
							case "yVal":
								$seriesValues[$seriesIndex] = self::_chartDataSeriesValueSet($seriesDetail,$namespacesChartMeta,$marker);
								break;
						}
					}
			}
		}
		return new PHPExcel_Chart_DataSeries($plotType,$multiSeriesType,$plotOrder,$seriesLabel,$seriesCategory,$seriesValues,$smoothLine);
	}	//	function _chartDataSeries()


	private static function _chartDataSeriesValueSet($seriesDetail, $namespacesChartMeta, $marker = null, $smoothLine = false) {
		if (isset($seriesDetail->strRef)) {
			$seriesSource = (string) $seriesDetail->strRef->f;
			$seriesData = self::_chartDataSeriesValues($seriesDetail->strRef->strCache->children($namespacesChartMeta['c']),'s');

			return new PHPExcel_Chart_DataSeriesValues('String',$seriesSource,$seriesData['formatCode'],$seriesData['pointCount'],$seriesData['dataValues'],$marker,$smoothLine);
		} elseif (isset($seriesDetail->numRef)) {
			$seriesSource = (string) $seriesDetail->numRef->f;
			$seriesData = self::_chartDataSeriesValues($seriesDetail->numRef->numCache->children($namespacesChartMeta['c']));

			return new PHPExcel_Chart_DataSeriesValues('Number',$seriesSource,$seriesData['formatCode'],$seriesData['pointCount'],$seriesData['dataValues'],$marker,$smoothLine);
		} elseif (isset($seriesDetail->multiLvlStrRef)) {
			$seriesSource = (string) $seriesDetail->multiLvlStrRef->f;
			$seriesData = self::_chartDataSeriesValuesMultiLevel($seriesDetail->multiLvlStrRef->multiLvlStrCache->children($namespacesChartMeta['c']),'s');
			$seriesData['pointCount'] = count($seriesData['dataValues']);

			return new PHPExcel_Chart_DataSeriesValues('String',$seriesSource,$seriesData['formatCode'],$seriesData['pointCount'],$seriesData['dataValues'],$marker,$smoothLine);
		} elseif (isset($seriesDetail->multiLvlNumRef)) {
			$seriesSource = (string) $seriesDetail->multiLvlNumRef->f;
			$seriesData = self::_chartDataSeriesValuesMultiLevel($seriesDetail->multiLvlNumRef->multiLvlNumCache->children($namespacesChartMeta['c']),'s');
			$seriesData['pointCount'] = count($seriesData['dataValues']);

			return new PHPExcel_Chart_DataSeriesValues('String',$seriesSource,$seriesData['formatCode'],$seriesData['pointCount'],$seriesData['dataValues'],$marker,$smoothLine);
		}
		return null;
	}	//	function _chartDataSeriesValueSet()


	private static function _chartDataSeriesValues($seriesValueSet,$dataType='n') {
		$seriesVal = array();
		$formatCode = '';
		$pointCount = 0;

		foreach($seriesValueSet as $seriesValueIdx => $seriesValue) {
			switch ($seriesValueIdx) {
				case 'ptCount':
					$pointCount = self::_getAttribute($seriesValue, 'val', 'integer');
					break;
				case 'formatCode':
					$formatCode = (string) $seriesValue;
					break;
				case 'pt':
					$pointVal = self::_getAttribute($seriesValue, 'idx', 'integer');
					if ($dataType == 's') {
						$seriesVal[$pointVal] = (string) $seriesValue->v;
					} else {
						$seriesVal[$pointVal] = (float) $seriesValue->v;
					}
					break;
			}
		}

		if (empty($seriesVal)) {
			$seriesVal = NULL;
		}

		return array( 'formatCode'	=> $formatCode,
					  'pointCount'	=> $pointCount,
					  'dataValues'	=> $seriesVal
					);
	}	//	function _chartDataSeriesValues()


	private static function _chartDataSeriesValuesMultiLevel($seriesValueSet,$dataType='n') {
		$seriesVal = array();
		$formatCode = '';
		$pointCount = 0;

		foreach($seriesValueSet->lvl as $seriesLevelIdx => $seriesLevel) {
			foreach($seriesLevel as $seriesValueIdx => $seriesValue) {
				switch ($seriesValueIdx) {
					case 'ptCount':
						$pointCount = self::_getAttribute($seriesValue, 'val', 'integer');
						break;
					case 'formatCode':
						$formatCode = (string) $seriesValue;
						break;
					case 'pt':
						$pointVal = self::_getAttribute($seriesValue, 'idx', 'integer');
						if ($dataType == 's') {
							$seriesVal[$pointVal][] = (string) $seriesValue->v;
						} else {
							$seriesVal[$pointVal][] = (float) $seriesValue->v;
						}
						break;
				}
			}
		}

		return array( 'formatCode'	=> $formatCode,
					  'pointCount'	=> $pointCount,
					  'dataValues'	=> $seriesVal
					);
	}	//	function _chartDataSeriesValuesMultiLevel()

	private static function _parseRichText($titleDetailPart = null) {
		$value = new PHPExcel_RichText();

		foreach($titleDetailPart as $titleDetailElementKey => $titleDetailElement) {
			if (isset($titleDetailElement->t)) {
				$objText = $value->createTextRun( (string) $titleDetailElement->t );
			}
			if (isset($titleDetailElement->rPr)) {
				if (isset($titleDetailElement->rPr->rFont["val"])) {
					$objText->getFont()->setName((string) $titleDetailElement->rPr->rFont["val"]);
				}

				$fontSize = (self::_getAttribute($titleDetailElement->rPr, 'sz', 'integer'));
				if (!is_null($fontSize)) {
					$objText->getFont()->setSize(floor($fontSize / 100));
				}

				$fontColor = (self::_getAttribute($titleDetailElement->rPr, 'color', 'string'));
				if (!is_null($fontColor)) {
					$objText->getFont()->setColor( new PHPExcel_Style_Color( self::_readColor($fontColor) ) );
				}

				$bold = self::_getAttribute($titleDetailElement->rPr, 'b', 'boolean');
				if (!is_null($bold)) {
					$objText->getFont()->setBold($bold);
				}

				$italic = self::_getAttribute($titleDetailElement->rPr, 'i', 'boolean');
				if (!is_null($italic)) {
					$objText->getFont()->setItalic($italic);
				}

				$baseline = self::_getAttribute($titleDetailElement->rPr, 'baseline', 'integer');
				if (!is_null($baseline)) {
					if ($baseline > 0) {
						$objText->getFont()->setSuperScript(true);
					} elseif($baseline < 0) {
						$objText->getFont()->setSubScript(true);
					}
				}

				$underscore = (self::_getAttribute($titleDetailElement->rPr, 'u', 'string'));
				if (!is_null($underscore)) {
					if ($underscore == 'sng') {
						$objText->getFont()->setUnderline(PHPExcel_Style_Font::UNDERLINE_SINGLE);
					} elseif($underscore == 'dbl') {
						$objText->getFont()->setUnderline(PHPExcel_Style_Font::UNDERLINE_DOUBLE);
					} else {
						$objText->getFont()->setUnderline(PHPExcel_Style_Font::UNDERLINE_NONE);
					}
				}

				$strikethrough = (self::_getAttribute($titleDetailElement->rPr, 's', 'string'));
				if (!is_null($strikethrough)) {
					if ($strikethrough == 'noStrike') {
						$objText->getFont()->setStrikethrough(false);
					} else {
						$objText->getFont()->setStrikethrough(true);
					}
				}
			}
		}

		return $value;
	}

	private static function _readChartAttributes($chartDetail) {
		$plotAttributes = array();
		if (isset($chartDetail->dLbls)) {
			if (isset($chartDetail->dLbls->howLegendKey)) {
				$plotAttributes['showLegendKey'] = self::_getAttribute($chartDetail->dLbls->showLegendKey, 'val', 'string');
			}
			if (isset($chartDetail->dLbls->showVal)) {
				$plotAttributes['showVal'] = self::_getAttribute($chartDetail->dLbls->showVal, 'val', 'string');
			}
			if (isset($chartDetail->dLbls->showCatName)) {
				$plotAttributes['showCatName'] = self::_getAttribute($chartDetail->dLbls->showCatName, 'val', 'string');
			}
			if (isset($chartDetail->dLbls->showSerName)) {
				$plotAttributes['showSerName'] = self::_getAttribute($chartDetail->dLbls->showSerName, 'val', 'string');
			}
			if (isset($chartDetail->dLbls->showPercent)) {
				$plotAttributes['showPercent'] = self::_getAttribute($chartDetail->dLbls->showPercent, 'val', 'string');
			}
			if (isset($chartDetail->dLbls->showBubbleSize)) {
				$plotAttributes['showBubbleSize'] = self::_getAttribute($chartDetail->dLbls->showBubbleSize, 'val', 'string');
			}
			if (isset($chartDetail->dLbls->showLeaderLines)) {
				$plotAttributes['showLeaderLines'] = self::_getAttribute($chartDetail->dLbls->showLeaderLines, 'val', 'string');
			}
		}

		return $plotAttributes;
	}

	private static function _setChartAttributes($plotArea,$plotAttributes)
	{
		foreach($plotAttributes as $plotAttributeKey => $plotAttributeValue) {
			switch($plotAttributeKey) {
				case 'showLegendKey' :
					$plotArea->setShowLegendKey($plotAttributeValue);
					break;
				case 'showVal' :
					$plotArea->setShowVal($plotAttributeValue);
					break;
				case 'showCatName' :
					$plotArea->setShowCatName($plotAttributeValue);
					break;
				case 'showSerName' :
					$plotArea->setShowSerName($plotAttributeValue);
					break;
				case 'showPercent' :
					$plotArea->setShowPercent($plotAttributeValue);
					break;
				case 'showBubbleSize' :
					$plotArea->setShowBubbleSize($plotAttributeValue);
					break;
				case 'showLeaderLines' :
					$plotArea->setShowLeaderLines($plotAttributeValue);
					break;
			}
		}
	}

}