altoslib: Add AltosLaunchSite bits

This asynchronously fetches the list of available launch sites from
the standard location and notifies the caller when finished.

Signed-off-by: Keith Packard <keithp@keithp.com>

4 files changed, 159 insertions, 0 deletions

diff --git a/altoslib/AltosLaunchSite.java b/altoslib/AltosLaunchSite.java
new file mode 100644
index 00000000..70a4bb58
--- /dev/null
+++ b/altoslib/AltosLaunchSite.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.altoslib_7;
+
+import java.io.*;
+import java.lang.*;
+import java.util.*;
+import java.text.*;
+import java.util.concurrent.*;
+
+public class AltosLaunchSite {
+	public String	name;
+	public double	latitude;
+	public double	longitude;
+
+	public String toString() {
+		return name;
+	}
+
+	public AltosLaunchSite(String in_name, double in_latitude, double in_longitude) {
+		name = in_name;
+		latitude = in_latitude;
+		longitude = in_longitude;
+	}
+
+	public AltosLaunchSite(String line) throws ParseException {
+		String[]	elements = line.split(":");
+
+		if (elements.length < 3)
+			throw new ParseException(String.format("Invalid site line %s", line), 0);
+
+		name = elements[0];
+
+		try {
+			latitude = AltosParse.parse_double_net(elements[1]);
+			longitude = AltosParse.parse_double_net(elements[2]);
+		} catch (ParseException pe) {
+			throw new ParseException(String.format("Invalid site line %s", line), 0);
+		}
+	}
+}
+
diff --git a/altoslib/AltosLaunchSiteListener.java b/altoslib/AltosLaunchSiteListener.java
new file mode 100644
index 00000000..21015909
--- /dev/null
+++ b/altoslib/AltosLaunchSiteListener.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+package org.altusmetrum.altoslib_7;
+
+import java.io.*;
+import java.lang.*;
+import java.util.*;
+import java.util.concurrent.*;
+
+public interface AltosLaunchSiteListener {
+	public abstract void notify_launch_sites(List<AltosLaunchSite> sites);
+}
diff --git a/altoslib/AltosLaunchSites.java b/altoslib/AltosLaunchSites.java
new file mode 100644
index 00000000..0922bcea
--- /dev/null
+++ b/altoslib/AltosLaunchSites.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.altoslib_7;
+
+import java.io.*;
+import java.lang.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.net.*;
+import java.text.*;
+
+public class AltosLaunchSites extends Thread {
+	URL				url;
+	LinkedList<AltosLaunchSite>	sites;
+	AltosLaunchSiteListener		listener;
+
+	void notify_complete() {
+		listener.notify_launch_sites(sites);
+	}
+
+	void add(AltosLaunchSite site) {
+		sites.add(site);
+	}
+
+	void add(String line) {
+		try {
+			add(new AltosLaunchSite(line));
+		} catch (ParseException pe) {
+			System.out.printf("parse exception %s\n", pe.toString());
+		}
+	}
+
+	public void run() {
+		try {
+			url = new URL(AltosLib.launch_sites_url);
+			URLConnection uc = url.openConnection();
+
+			InputStreamReader in_stream = new InputStreamReader(uc.getInputStream(), AltosLib.unicode_set);
+			BufferedReader in = new BufferedReader(in_stream);
+
+			for (;;) {
+				String line = in.readLine();
+				if (line == null)
+					break;
+				add(line);
+			}
+		} catch (Exception e) {
+		} finally {
+			notify_complete();
+		}
+	}
+
+	public AltosLaunchSites(AltosLaunchSiteListener listener) {
+		sites = new LinkedList<AltosLaunchSite>();
+		this.listener = listener;
+		start();
+	}
+}
diff --git a/altoslib/Makefile.am b/altoslib/Makefile.am
index 481c974f..de13c1ec 100644
--- a/altoslib/Makefile.am
+++ b/altoslib/Makefile.am
@@ -151,6 +151,9 @@ altoslib_JAVA = \
 	AltosRectangle.java \
 	AltosFlightDisplay.java \
 	AltosFontListener.java \
+	AltosLaunchSite.java \
+	AltosLaunchSiteListener.java \
+	AltosLaunchSites.java \
 	AltosVersion.java
 
 JAR=altoslib_$(ALTOSLIB_VERSION).jar