Questtype ?Textinput?: add support for field sizes (Issue #252) and general improvements

www/analytics/plugins/CoreVisualizations/Visualizations/Sparkline.php

@@ -0,0 +1,128 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik\Plugins\CoreVisualizations\Visualizations;
+
+use Exception;
+use Piwik\Common;
+use Piwik\DataTable;
+use Piwik\Plugin\ViewDataTable;
+
+/**
+ * Reads the requested DataTable from the API and prepare data for the Sparkline view.
+ *
+ */
+class Sparkline extends ViewDataTable
+{
+    const ID = 'sparkline';
+
+    /**
+     * @see ViewDataTable::main()
+     * @return mixed
+     */
+    protected function buildView()
+    {
+        // If period=range, we force the sparkline to draw daily data points
+        $period = Common::getRequestVar('period');
+        if ($period == 'range') {
+            $_GET['period'] = 'day';
+        }
+
+        $this->loadDataTableFromAPI();
+
+        // then revert the hack for potentially subsequent getRequestVar
+        $_GET['period'] = $period;
+
+        $values = $this->getValuesFromDataTable($this->dataTable);
+        if (empty($values)) {
+            $values = array_fill(0, 30, 0);
+        }
+
+        $graph = new \Piwik\Visualization\Sparkline();
+        $graph->setValues($values);
+
+        $height = Common::getRequestVar('height', 0, 'int');
+        if (!empty($height)) {
+            $graph->setHeight($height);
+        }
+
+        $width = Common::getRequestVar('width', 0, 'int');
+        if (!empty($width)) {
+            $graph->setWidth($width);
+        }
+
+        $graph->main();
+
+        return $graph;
+    }
+
+    /**
+     * @param DataTable\Map $dataTableMap
+     * @param string $columnToPlot
+     *
+     * @return array
+     * @throws \Exception
+     */
+    protected function getValuesFromDataTableMap($dataTableMap, $columnToPlot)
+    {
+        $dataTableMap->applyQueuedFilters();
+
+        $values = array();
+
+        foreach ($dataTableMap->getDataTables() as $table) {
+
+            if ($table->getRowsCount() > 1) {
+                throw new Exception("Expecting only one row per DataTable");
+            }
+
+            $value   = 0;
+            $onlyRow = $table->getFirstRow();
+
+            if (false !== $onlyRow) {
+                if (!empty($columnToPlot)) {
+                    $value = $onlyRow->getColumn($columnToPlot);
+                } // if not specified, we load by default the first column found
+                // eg. case of getLastDistinctCountriesGraph
+                else {
+                    $columns = $onlyRow->getColumns();
+                    $value = current($columns);
+                }
+            }
+
+            $values[] = $value;
+        }
+
+        return $values;
+    }
+
+    protected function getValuesFromDataTable($dataTable)
+    {
+        $columns = $this->config->columns_to_display;
+
+        $columnToPlot = false;
+
+        if (!empty($columns)) {
+            $columnToPlot = reset($columns);
+            if ($columnToPlot == 'label') {
+                $columnToPlot = next($columns);
+            }
+        }
+
+        // a Set is returned when using the normal code path to request data from Archives, in all core plugins
+        // however plugins can also return simple datatable, hence why the sparkline can accept both data types
+        if ($this->dataTable instanceof DataTable\Map) {
+            $values = $this->getValuesFromDataTableMap($dataTable, $columnToPlot);
+        } elseif ($this->dataTable instanceof DataTable) {
+            $values = $this->dataTable->getColumn($columnToPlot);
+        } else {
+            $values = false;
+        }
+
+        return $values;
+    }
+}