Track Uemis last dive downloaded on a per data-file basis

Actually, it's even better than that. Thanks to the new divecomputer
datastructure we can now simply look up in the dive_table which dives have
been downloaded from this specific Uemis SDA.

This patch removes the old gconf based code - which leads to one
unfortunate problem: the first time a Uemis SDA owner runs this version of
Subsurface against their data file ALL dives will be downloaded again
(which may not be a bad thing as we have improved a few other details of
Uemis support so now they get their deco information, surface pressure and
other data that we have started to support since 2.1). Still, this is not
ideal. But I didn't want to keep the legacy code around since this new
solution is so much cleaner.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

4 files changed, 20 insertions, 97 deletions

diff --git a/display-gtk.h b/display-gtk.h
index e1fd4f5d9..b524f5e50 100644
--- a/display-gtk.h
+++ b/display-gtk.h
@@ -113,7 +113,7 @@ typedef gint (*sort_func_t)(GtkTreeModel *model,
 extern GtkTreeViewColumn *tree_view_column(GtkWidget *tree_view, int index, const char *title,
 		data_func_t data_func, unsigned int flags);
 
-GError *uemis_download(const char *path, char **divenr, char **xml_buffer,
+GError *uemis_download(const char *path, char **xml_buffer,
 			progressbar_t *progress, GtkDialog *dialog, gboolean force_download);
 
 #endif
diff --git a/gtk-gui.c b/gtk-gui.c
index dc9620914..81f93ca1e 100644
--- a/gtk-gui.c
+++ b/gtk-gui.c
@@ -42,7 +42,6 @@ partial_pressure_graphs_t partial_pressure_graphs = { FALSE, FALSE, FALSE, 1.6,
 static const char *default_dive_computer_vendor;
 static const char *default_dive_computer_product;
 static const char *default_dive_computer_device;
-static char *uemis_max_dive_data;
 static gboolean force_download;
 static gboolean prefer_downloaded;
 
@@ -87,12 +86,6 @@ static void set_default_dive_computer_device(const char *name)
 	subsurface_set_conf("dive_computer_device", PREF_STRING, name);
 }
 
-static void set_uemis_last_dive(char *data)
-{
-	uemis_max_dive_data = data;
-	subsurface_set_conf("uemis_max_dive_data", PREF_STRING, data);
-}
-
 void repaint_dive(void)
 {
 	update_dive(current_dive);
@@ -1157,12 +1150,6 @@ void init_ui(int *argcp, char ***argvp)
 	default_dive_computer_vendor = subsurface_get_conf("dive_computer_vendor", PREF_STRING);
 	default_dive_computer_product = subsurface_get_conf("dive_computer_product", PREF_STRING);
 	default_dive_computer_device = subsurface_get_conf("dive_computer_device", PREF_STRING);
-	conf_value = subsurface_get_conf("uemis_max_dive_data", PREF_STRING);
-	if (!conf_value)
-		uemis_max_dive_data = strdup("");
-	else
-		uemis_max_dive_data = strdup(conf_value);
-	free((char *)conf_value);
 	error_info_bar = NULL;
 	win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 	g_set_application_name ("subsurface");
@@ -1662,16 +1649,12 @@ static GError *setup_uemis_import(device_data_t *data)
 	GError *error = NULL;
 	char *buf = NULL;
 
-	error = uemis_download(data->devname, &uemis_max_dive_data, &buf, &data->progress, data->dialog, data->force_download);
+	error = uemis_download(data->devname, &buf, &data->progress, data->dialog, data->force_download);
 	if (buf && strlen(buf) > 1) {
 #if UEMIS_DEBUG > 3
 		fprintf(debugfile, "xml buffer \"%s\"\n\n", buf);
 #endif
 		parse_xml_buffer("Uemis Download", buf, strlen(buf), TRUE, &error);
-		set_uemis_last_dive(uemis_max_dive_data);
-#if UEMIS_DEBUG > 2
-		fprintf(debugfile, "uemis_max_dive_data: %s\n", uemis_max_dive_data);
-#endif
 		mark_divelist_changed(TRUE);
 	}
 	return error;
diff --git a/uemis-downloader.c b/uemis-downloader.c
index ac45940b5..9577c48cc 100644
--- a/uemis-downloader.c
+++ b/uemis-downloader.c
@@ -44,7 +44,6 @@ static int mbuf_size = 0;
 
 struct argument_block {
 	const char *mountpath;
-	char **max_dive_data;
 	char **xml_buffer;
 	progressbar_t *progress;
 	gboolean force_download;
@@ -720,78 +719,26 @@ static char *process_raw_buffer(char *inbuf, char **max_divenr)
 	return strdup(conv_buffer);
 }
 
-/* to keep track of multiple computers we simply encode the last dive read
-   in tuples "{deviceid,nr},{deviceid,nr}..." no spaces to make parsing easier */
-
-static char *find_deviceid(char *max_dive_data, char *deviceid)
+static char *get_divenr(char *deviceidstr)
 {
-	char *pattern;
-	char *result;
-	if (! deviceid || *deviceid == '\0')
-		return NULL;
-	pattern = malloc(3 + strlen(deviceid));
-	sprintf(pattern, "{%s,", deviceid);
-	result = strstr(max_dive_data, pattern);
-	free(pattern);
-	return result;
-}
-
-static char *get_divenr(char *max_dive_data, char *deviceid)
-{
-	char *q, *p = max_dive_data;
-	char *result = NULL;
-
-	if (!p || !deviceid)
-		return strdup("0");
-	p = find_deviceid(max_dive_data, deviceid);
-	if (p) {
-		p += strlen(deviceid) + 2;
-		q = strchr(p, '}');
-		if (!q)
-			return result;
-		result = malloc(q - p + 1);
-		strncpy(result, p, q - p);
-		result[q - p] = '\0';
+	int deviceid, i, maxdiveid = 0;
+	char divenr[10];
+
+	if (sscanf(deviceidstr, "%d", &deviceid) != 1)
+		return "0";
+	for (i = 0; i < dive_table.nr; i++) {
+		struct divecomputer *dc = &dive_table.dives[i]->dc;
+		if (dc->deviceid == deviceid && dc->diveid > maxdiveid)
+			maxdiveid = dc->diveid;
 	}
-	if (!result)
-		result = strdup("0");
-	return result;
-}
-
-static char *update_max_dive_data(char *max_dive_data, char *deviceid, char *newmax)
-{
-	char *p;
-	char *result;
-	int len;
+	snprintf(divenr, 10, "%d", maxdiveid);
 
-	if (! newmax || *newmax == '\0')
-		return max_dive_data;
-	p = find_deviceid(max_dive_data, deviceid);
-	if (p) {
-		/* if there are more entries after this one, copy them,
-		   otherwise just remove the existing entry for this device */
-		char *q = strstr(p, "},{");
-		if (q) {
-			memcpy(p + 1, q + 3, strlen(q + 3) + 1);
-		} else {
-			if (p > max_dive_data)
-				*(p-1) = '\0';
-			else
-				*p = '\0';
-		}
-	}
-	/* now add the new one at the end */
-	len = strlen(max_dive_data) + strlen(deviceid) + strlen(newmax) + 4 + (strlen(max_dive_data) ? 1 : 0);
-	result = malloc(len);
-	snprintf(result, len, "%s%s{%s,%s}", max_dive_data, strlen(max_dive_data) ? "," : "", deviceid, newmax);
-	free(max_dive_data);
-	return result;
+	return strdup(divenr);
 }
 
 static char *do_uemis_download(struct argument_block *args)
 {
 	const char *mountpath = args->mountpath;
-	char **max_dive_data = args->max_dive_data;
 	char **xml_buffer = args->xml_buffer;
 	int xml_buffer_size;
 	char *newmax = NULL;
@@ -827,7 +774,7 @@ static char *do_uemis_download(struct argument_block *args)
 	 * the Uemis; otherwise check which was the last dive
 	 * downloaded */
 	if (!args->force_download && dive_table.nr > 0)
-		newmax = get_divenr(*max_dive_data, deviceid);
+		newmax = get_divenr(deviceid);
 	else
 		newmax = strdup("0");
 
@@ -862,7 +809,6 @@ static char *do_uemis_download(struct argument_block *args)
 		if (endptr)
 			*(endptr + 2) = '\0';
 	}
-	*args->max_dive_data = update_max_dive_data(*max_dive_data, deviceid, newmax);
 	if (sscanf(newmax, "%d", &end) != 1)
 		end = start;
 #if UEMIS_DEBUG > 1
@@ -920,12 +866,12 @@ static gboolean timeout_func(gpointer _data)
 	return FALSE;
 }
 
-GError *uemis_download(const char *mountpath, char **max_dive_data, char **xml_buffer, progressbar_t *progress,
+GError *uemis_download(const char *mountpath, char **xml_buffer, progressbar_t *progress,
 			GtkDialog *dialog, gboolean force_download)
 {
 	pthread_t pthread;
 	void *retval;
-	struct argument_block args = {mountpath, max_dive_data, xml_buffer, progress, force_download};
+	struct argument_block args = {mountpath, xml_buffer, progress, force_download};
 
 	/* I'm sure there is some better interface for waiting on a thread in a UI main loop */
 	import_thread_done = 0;
diff --git a/uemis.c b/uemis.c
index 198d90358..3c5bef082 100644
--- a/uemis.c
+++ b/uemis.c
@@ -199,16 +199,10 @@ void uemis_parse_divelog_binary(char *base64, void *datap) {
 	else
 		dive->salinity = 10000; /* grams per 10l fresh water */
 
+	/* this will allow us to find the last dive read so far from this computer */
 	dc->model = strdup("Uemis Zurich");
-
-	/*
-	 * FIXME:
-	 *  - make the deive ID  the first word of the SHA1 sum of the deviceid string
-	 *  - do we want to have a dive ID? Without one, we'll just use the dive date,
-	 *    which is likely fine.
-	 */
-	dc->deviceid = 0;
-	dc->diveid = 0;
+	dc->deviceid = *(uint32_t *)(data + 9);
+	dc->diveid = *(uint16_t *)(data + 7);
 
 	/* dive template in use:
 	   0 = air