Enumerate log entries using delegates and lambdas
[gregoa/zavai.git] / src / log.vala
index 1a5eba946d0f7111607349fe157f42315292c2e3..2f10dbc8b5766b69ffe60e728e0cc2870e86cced 100644 (file)
@@ -47,7 +47,7 @@ public class Waypoint : Object
     public void writeInside(FileStream outfd)
     {
         var t = Time.gm(ts);
-        outfd.printf("   <time>%s</time>\n", t.format("%Y-%m-%dT%H:%M:%SZ"));
+        outfd.printf("   <time>%s</time>\n", t.format("%Y-%m-%dT%H:%M:%S%z"));
     }
 }
 
@@ -90,13 +90,15 @@ public class Log : Object
 {
     public string tag;
     public string title;
+    public bool acked;
     public List<LogEntry> entries;
     public List<TrackEntry> track;
 
-    public Log(string tag, string title)
+    public Log(string tag, string title, bool acked=false)
     {
         this.tag = tag;
         this.title = title;
+        this.acked = acked;
         entries = null;
         track = null;
     }
@@ -118,12 +120,16 @@ public class Log : Object
         if (entries == null) return;
 
         // Directory where we save the log
-        string dir = config.homedir + "/log-" + tag;
+        string dir;
+        if (acked)
+            dir = config.homedir + "/archive";
+        else
+            dir = config.homedir + "/log";
         DirUtils.create(dir, 0777);
 
         // First try with a plain name
         var t = Time.local(entries.data.ts);
-        string basename = dir + "/" + t.format("%Y%m%d-%H%M%S");
+        string basename = dir + "/" + t.format("%Y%m%d-%H%M%S") + "-" + tag;
 
         string pathname = basename + ".gpx";
 
@@ -143,6 +149,11 @@ public class Log : Object
         outfd.flush();
     }
 
+    public void dump()
+    {
+        write(stderr);
+    }
+
     protected void writeTrack(FileStream outfd)
     {
         outfd.puts("   <trk>\n");
@@ -155,10 +166,8 @@ public class Log : Object
 
     protected void writeEntries(FileStream outfd)
     {
-        outfd.puts("   <wpt>\n");
         for (weak List<LogEntry> i = entries; i != null; i = i.next)
             i.data.write(outfd);
-        outfd.puts("   </wpt>\n");
     }
 
     protected void write(FileStream outfd)
@@ -178,6 +187,127 @@ public class Log : Object
     }
 }
 
+enum LogParserState {
+    NONE,
+    METADATA,
+    TRACK,
+    WPT,
+}
+
+class LogParser: Object
+{
+    const MarkupParser parser = { // It's a structure, not an object
+        start,// when an element opens
+        end,  // when an element closes
+        text, // when text is found
+        null, // when comments are found
+        null  // when errors occur
+    };
+
+    MarkupParseContext context = null;
+    public Log result = null;
+    LogParserState state = LogParserState.NONE;
+    string cur_text = "";
+    LogEntry cur_logentry = null;
+    TrackEntry cur_trackentry = null;
+
+    construct
+    {
+        context = new MarkupParseContext(
+            parser, // the structure with the callbacks
+            0,      // MarkupParseFlags
+            this,   // extra argument for the callbacks, methods in this case
+            destroy // when the parsing ends
+        );
+    }
+
+    void destroy()
+    {
+        cur_text = "";
+        cur_logentry = null;
+        cur_trackentry = null;
+    }
+
+    public bool parse(string content, ssize_t len = -1) throws MarkupError
+    {
+        string oldtz = Environment.get_variable("TZ");
+        Environment.set_variable("TZ", "UTC", true);
+        bool res = context.parse(content, len);
+        if (oldtz == null)
+            Environment.unset_variable("TZ");
+        else
+            Environment.set_variable("TZ", oldtz, true);
+        return res;
+    }
+
+    void parse_attrs(Waypoint w, string[] attr_names, string[] attr_values)
+    {
+        w.lat = 1000;
+        w.lon = 1000;
+        for (int i = 0; attr_names[i] != null; ++i)
+        {
+            if (attr_names[i] == "lat")
+                w.lat = attr_values[i].to_double();
+            else if (attr_names[i] == "lon")
+                w.lon = attr_values[i].to_double();
+        }
+    }
+
+    void start (MarkupParseContext context, string name,
+                string[] attr_names, string[] attr_values) throws MarkupError
+    {
+        if (name == "gpx")
+        {
+            state = LogParserState.NONE;
+            result = new Log("TODO:TAG", "TODO:TITLE");
+        } else if (name == "metadata") {
+            state = LogParserState.METADATA;
+        } else if (name == "wpt") {
+            cur_logentry = new LogEntry();
+            parse_attrs(cur_logentry, attr_names, attr_values);
+            result.entries.append(cur_logentry);
+            state = LogParserState.WPT;
+        } else if (name == "trkpt") {
+            cur_trackentry = new TrackEntry();
+            parse_attrs(cur_trackentry, attr_names, attr_values);
+            result.track.append(cur_trackentry);
+            state = LogParserState.TRACK;
+        }
+        cur_text = "";
+    }
+
+    void end (MarkupParseContext context, string name) throws MarkupError
+    {
+        if (name == "name")
+        {
+            switch (state)
+            {
+                case LogParserState.METADATA:
+                    result.title = cur_text;
+                    break;
+                case LogParserState.WPT:
+                    cur_logentry.msg = cur_text;
+                    break;
+            }
+        }
+        else if (name == "time")
+        {
+            Time t = Time();
+            t.strptime(cur_text, "%Y-%m-%dT%H:%M:%S%z");
+            if (state == LogParserState.WPT)
+                cur_logentry.ts = t.mktime();
+            else if (state == LogParserState.TRACK)
+                cur_trackentry.ts = t.mktime();
+        }
+    }
+
+    void text (MarkupParseContext context,
+               string text, size_t text_len) throws MarkupError
+    {
+        cur_text += text;
+    }
+}
+
 public class Logger : Resource, Object
 {
     protected List<Log> logs;
@@ -227,6 +357,39 @@ public class Logger : Resource, Object
         if (logs == null) end_trace();
     }
 
+    public Log load(string fname)
+    {
+        string contents;
+        size_t length;
+        FileUtils.get_contents(fname, out contents, out length);
+        LogParser parser = new LogParser();
+        parser.parse(contents, (ssize_t)length);
+        return parser.result;
+    }
+
+    public delegate bool EntriesVisitor(string dir, string name);
+
+
+    protected void list_dir(string dir, EntriesVisitor visitor)
+    {
+        var d = File.new_for_path(dir);
+        var enumerator = d.enumerate_children(FILE_ATTRIBUTE_STANDARD_NAME, 0, null);
+        FileInfo file_info;
+        while ((file_info = enumerator.next_file(null)) != null)
+        {
+            if (!file_info.get_name().has_suffix(".gpx")) continue;
+            if (!visitor(dir, file_info.get_name()))
+                break;
+        }
+    }
+
+    public void list_entries(EntriesVisitor visitor, bool only_unacked=true)
+    {
+        if (!only_unacked)
+            list_dir(config.homedir + "/archive", visitor);
+        list_dir(config.homedir + "/log", visitor);
+    }
+
     public void instant(string tag, string msg)
     {
         var log = new Log(tag, msg);