Initial pass at static Mapbox maps

src/WPStrava/StaticMapbox.php

@@ -0,0 +1,58 @@
+<?php
+
+class WPStrava_StaticMapbox extends WPStrava_StaticMap {
+
+	public function get_image_tag( $activity, $height = 320, $width = 480, $markers = false, $title = '' ) {
+
+		$polyline = '';
+
+		if ( ! empty( $activity->map->polyline ) ) {
+			$polyline = $activity->map->polyline;
+		} elseif ( ! empty( $activity->map->summary_polyline ) ) {
+			$polyline = $activity->map->summary_polyline;
+		}
+
+		if ( empty( $polyline ) ) {
+			// No polyline provided.
+			return '';
+		}
+
+		$url = $this->build_url( $polyline, $height, $width, $markers );
+
+		$url_len = strlen( $url );
+		if ( $url_len > self::$max_chars ) {
+			// Need to reduce the polyline b/c it's too big.
+			$polyline = $this->reduce_polyline( $url_len - $this->polyline_length( $polyline ), $polyline );
+			$url      = $this->build_url( $polyline, $height, $width, $markers );
+		}
+
+		$title_attr = $title ? " title='" . esc_attr( $title ) . "'" : '';
+		return "<img class='wp-strava-img' src='{$url}'{$title_attr} />";
+	}
+
+	private function build_url( $polyline, $height = 320, $width = 480, $markers = false ) {
+
+		$url   = 'https://api.mapbox.com/styles/v1/mapbox/outdoors-v11/static/';
+		$size  = "auto/{$width}x{$height}@2x";
+		$token = 'access_token=pk.eyJ1IjoianJmb2VsbCIsImEiOiJ4NkNwU2RjIn0.MHjY7k0Okawa3bdV9HtSXg';
+
+		$path = array();
+
+		if ( $markers ) {
+			$points = $this->decode_start_finish( $polyline );
+			$path[] = "pin-s+008000({$points['start'][0]},{$points['start'][1]})";
+			$path[] = "pin-s+ff0000({$points['finish'][0]},{$points['finish'][1]})";
+		}
+
+		// polyline must be URL encoded https://stackoverflow.com/a/65523379/2146022
+		$url_polyline = rawurlencode( $polyline );
+		$path[]       = "path-2+ff0000({$url_polyline})";
+		$url         .= implode( ',', $path ) . "/{$size}?{$token}";
+
+		return $url;
+	}
+
+	protected function polyline_length( $polyline ) {
+		return strlen( rawurlencode( $polyline ) );
+	}
+}