Adding weather forecast!

server/forecast.php

@@ -0,0 +1,122 @@
+<?php
+
+require_once("provider.php");
+
+class WeatherForecastProvider implements ServiceProvider {
+	// Widget properties
+	static $widgetName = "Weather Forecast";
+	static $widgetIcon = "forecast.svg";
+
+	public $location;
+	public $width;
+	public $height;
+	public $ndays;
+
+	function WeatherForecastProvider() {
+		$this->location = "Barcelona,ES";
+		$this->width = 1000;
+		$this->height = 200;
+		$this->font_size = 0.15;
+		$this->font_family = "Arial";
+		$this->ndays = 5;
+	}
+
+    public function getTunables() {
+		return array(
+			"location"    => array("type" => "text", "display" => "Location", "value" => $this->location),
+			"font_family" => array("type" => "text", "display" => "Font Family", "value" => $this->font_family),
+			"font_size"   => array("type" => "fnum", "display" => "Font Size", "value" => $this->font_size),
+			"ndays"       => array("type" => "num",  "display" => "Number of days", "value" => $this->ndays)
+		);
+	}
+    public function setTunables($v) {
+		$this->location = $v["location"]["value"];
+		$this->font_family = $v["font_family"]["value"];
+		$this->font_size = $v["font_size"]["value"];
+		$this->ndays = $v["ndays"]["value"];
+	}
+
+    public function shape() {
+		// Return default width/height
+		return array(
+			"width"       => $this->width,
+			"height"      => $this->height,
+			"resizable"   => true,
+			"keep_aspect" => true,
+		);
+    }
+
+    public function render() {
+		// Gather information from OpenWeatherMap
+		global $weather_api_key;
+		$raw = file_get_contents(
+			"http://api.openweathermap.org/data/2.5/forecast/daily?cnt=".$this->ndays."&q=".$this->location."&APPID=".$weather_api_key
+		);
+		$weather = json_decode($raw, true);
+
+		$forecast = $weather["list"];
+
+		$daily = array();
+		$nd = count($forecast);
+		for ($i = 0; $i < $nd; $i++) {
+			$icon = $forecast[$i]["weather"][0]["icon"];
+			$dayn = date('D', $forecast[$i]["dt"]);
+			$mint = $forecast[$i]["temp"]["min"] - 273.15;
+			$maxt = $forecast[$i]["temp"]["max"] - 273.15;
+
+			$daily[] = sprintf(
+				'<image x="%d" y="%d" width="%d" height="%d" xlink:href="%s" />
+				<text alignment-baseline="central" text-anchor="middle" x="%d" y="%d" fill="black" style="font-size: %dpx; font-style: %s; font-weight: bold;">
+				%s
+				</text>
+				<text alignment-baseline="central" text-anchor="middle" x="%d" y="%d" fill="black" style="font-size: %dpx; font-style: %s; font-weight: bold;">
+				%d° %d°
+				</text>
+				',
+				$this->width / $nd * ($i + 0.05), $this->height * 0.15,
+				$this->width / $nd * 0.9, $this->height * 0.6,
+				ProviderAux::embedSVG("resources/".$this->imgmap[$icon].".svg"),
+				$this->width / $nd * ($i + 0.5), 0.12  * $this->height,
+				$this->font_size * $this->height, $this->font_family,
+				$dayn,
+				$this->width / $nd * ($i + 0.5), 0.92  * $this->height,
+				$this->font_size * $this->height, $this->font_family,
+				$mint, $maxt
+			);
+		}
+
+		// Generate an SVG image out of this 
+		return sprintf(
+			'<svg width="%d" height="%d" version="1.1" xmlns="http://www.w3.org/2000/svg" 
+				xmlns:xlink="http://www.w3.org/1999/xlink">
+				%s
+			</svg>',
+				$this->width, $this->height,
+				implode("\n", $daily)
+		);
+	}
+
+	// Weather code -> image mapping!
+	public $imgmap = array(
+		"01d" => "sun",
+		"01n" => "moon",
+		"02d" => "sun_cloud",
+		"02n" => "moon_cloud",
+		"03d" => "sun_scat_cloud",
+		"03n" => "moon_scat_cloud",
+		"04d" => "clouds",
+		"04n" => "clouds",
+		"09d" => "shower_rain",
+		"09n" => "shower_rain",
+		"10d" => "light_rain",
+		"10n" => "light_rain",
+		"11d" => "thunder",
+		"11n" => "thunder",
+		"13d" => "snow",
+		"13d" => "snow",
+		"50n" => "day_mist",
+		"50n" => "night_mist",
+	);
+};
+
+?>

server/functions.php

@@ -6,6 +6,7 @@
 require_once("currency.php");
 require_once("stock.php");
 require_once("btc.php");
+require_once("forecast.php");
 
 function array2js($a) {
 	if (is_array($a)) {