[andy/viking.git] / src / googlesearch.c

/*
 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
 *
 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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
 *
 * Created by Quy Tonthat <qtonthat@gmail.com>
 */
#include <stdlib.h>
#include <string.h>
#include <glib/gprintf.h>

#include "viking.h"
#include "curl_download.h"

#define GOOGLE_SEARCH_URL_FMT "http://maps.google.com/maps?q=%s&output=js"
#define GOOGLE_SEARCH_PATTERN_1 "{center:{lat:"
#define GOOGLE_SEARCH_PATTERN_2 ",lng:"
#define GOOGLE_SEARCH_NOT_FOUND "around this map area did not match any locations"

static gchar *last_search_str = NULL;
static VikCoord *last_coord = NULL;
static gchar *last_successful_search_str = NULL;

static DownloadOptions googlesearch_options = { "http://maps.google.com/", 0 };

gchar * a_googlesearch_get_search_string_for_this_place(VikWindow *vw)
{
  if (!last_coord)
    return NULL;

  VikViewport *vvp = vik_window_viewport(vw);
  const VikCoord *cur_center = vik_viewport_get_center(vvp);
  if (vik_coord_equals(cur_center, last_coord)) {
    return(last_successful_search_str);
  }
  else
    return NULL;
}

static gboolean prompt_try_again(VikWindow *vw)
{
  GtkWidget *dialog = NULL;
  gboolean ret = TRUE;

  dialog = gtk_dialog_new_with_buttons ( "", GTK_WINDOW(vw), 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT, NULL );
  gtk_window_set_title(GTK_WINDOW(dialog), "Search");

  GtkWidget *search_label = gtk_label_new("I don't know that place. Do you want another search?");
  gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), search_label, FALSE, FALSE, 5 );
  gtk_widget_show_all(dialog);

  if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) != GTK_RESPONSE_ACCEPT )
    ret = FALSE;

  gtk_widget_destroy(dialog);
  return ret;
}

static gchar *  a_prompt_for_search_string(VikWindow *vw)
{
  GtkWidget *dialog = NULL;

  dialog = gtk_dialog_new_with_buttons ( "", GTK_WINDOW(vw), 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT, NULL );
  gtk_window_set_title(GTK_WINDOW(dialog), "Search");

  GtkWidget *search_label = gtk_label_new("Enter address or place name:");
  GtkWidget *search_entry = gtk_entry_new();
  if (last_search_str)
    gtk_entry_set_text(GTK_ENTRY(search_entry), last_search_str);

  gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), search_label, FALSE, FALSE, 5 );
  gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), search_entry, FALSE, FALSE, 5 );
  gtk_widget_show_all(dialog);

  if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) != GTK_RESPONSE_ACCEPT ) {
    gtk_widget_destroy(dialog);
    return NULL;
  }

  gchar *search_str = g_strdup ( gtk_entry_get_text ( GTK_ENTRY(search_entry) ) );

  gtk_widget_destroy(dialog);

  if (search_str[0] != '\0') {
    if (last_search_str)
      g_free(last_search_str);
    last_search_str = g_strdup(search_str);
  }

  return(search_str);   /* search_str needs to be freed by caller */
}

static gboolean parse_file_for_latlon(gchar *file_name, struct LatLon *ll)
{
  gchar *text, *pat;
  GMappedFile *mf;
  gsize len;
  gboolean found = TRUE;
  gchar lat_buf[32], lon_buf[32];
  gchar *s;

  lat_buf[0] = lon_buf[0] = '\0';

  if ((mf = g_mapped_file_new(file_name, FALSE, NULL)) == NULL) {
    g_critical("couldn't map temp file\n");
    exit(1);
  }
  len = g_mapped_file_get_length(mf);
  text = g_mapped_file_get_contents(mf);

  if (g_strstr_len(text, len, GOOGLE_SEARCH_NOT_FOUND) != NULL) {
    found = FALSE;
    goto done;
  }

  if ((pat = g_strstr_len(text, len, GOOGLE_SEARCH_PATTERN_1)) == NULL) {
    found = FALSE;
    goto done;
  }
  pat += strlen(GOOGLE_SEARCH_PATTERN_1);
  s = lat_buf;
  if (*pat == '-')
    *s++ = *pat++;
  while ((s < (lat_buf + sizeof(lat_buf))) && (pat < (text + len)) &&
          (g_ascii_isdigit(*pat) || (*pat == '.')))
    *s++ = *pat++;
  *s = '\0';
  if ((pat >= (text + len)) || (lat_buf[0] == '\0')) {
    found = FALSE;
    goto done;
  }

  if (strncmp(pat, GOOGLE_SEARCH_PATTERN_2, strlen(GOOGLE_SEARCH_PATTERN_2))) {
      found = FALSE;
      goto done;
  }

  pat += strlen(GOOGLE_SEARCH_PATTERN_2);
  s = lon_buf;

  if (*pat == '-')
    *s++ = *pat++;
  while ((s < (lon_buf + sizeof(lon_buf))) && (pat < (text + len)) &&
          (g_ascii_isdigit(*pat) || (*pat == '.')))
    *s++ = *pat++;
  *s = '\0';
  if ((pat >= (text + len)) || (lon_buf[0] == '\0')) {
    found = FALSE;
    goto done;
  }

  ll->lat = g_ascii_strtod(lat_buf, NULL);
  ll->lon = g_ascii_strtod(lon_buf, NULL);

done:
  g_mapped_file_free(mf);
  return (found);

}

gchar *uri_escape(gchar *str)
{
  gchar *esc_str = g_malloc(3*strlen(str));
  gchar *dst = esc_str;
  gchar *src;

  for (src = str; *src; src++) {
    if (*src == ' ')
     *dst++ = '+';
    else if (g_ascii_isalnum(*src))
     *dst++ = *src;
    else {
      g_sprintf(dst, "%%%02X", *src);
      dst += 3;
    }
  }

    return(esc_str);
}

static int google_search_get_coord(VikWindow *vw, VikViewport *vvp, gchar *srch_str, VikCoord *coord)
{
  FILE *tmp_file;
  int tmp_fd;
  gchar *tmpname;
  gchar *uri;
  gchar *escaped_srch_str;
  int ret = 0;  /* OK */
  struct LatLon ll;

  escaped_srch_str = uri_escape(srch_str);

  if ((tmp_fd = g_file_open_tmp ("vikgsearch.XXXXXX", &tmpname, NULL)) == -1) {
    g_critical("couldn't open temp file\n");
    exit(1);
  }

  tmp_file = fdopen(tmp_fd, "r+");
  //uri = g_strdup_printf(GOOGLE_SEARCH_URL_FMT, srch_str);
  uri = g_strdup_printf(GOOGLE_SEARCH_URL_FMT, escaped_srch_str);

  /* TODO: curl may not be available */
  if (curl_download_uri(uri, tmp_file, &googlesearch_options)) {  /* error */
    fclose(tmp_file);
    ret = -1;
    goto done;
  }

  fclose(tmp_file);
  if (!parse_file_for_latlon(tmpname, &ll)) {
    ret = -1;
    goto done;
  }

  vik_coord_load_from_latlon ( coord, vik_viewport_get_coord_mode(vvp), &ll );

  if (last_coord)
    g_free(last_coord);
  last_coord = g_malloc(sizeof(VikCoord));
  *last_coord = *coord;
  if (last_successful_search_str)
    g_free(last_successful_search_str);
  last_successful_search_str = g_strdup(last_search_str);

done:
  g_free(escaped_srch_str);
  g_free(uri);
  remove(tmpname);
  g_free(tmpname);
  return ret;
}

void a_google_search(VikWindow *vw, VikLayersPanel *vlp, VikViewport *vvp)
{
  VikCoord new_center;
  gchar *s_str;
  gboolean more = TRUE;

  do {
    s_str = a_prompt_for_search_string(vw);
    if ((!s_str) || (s_str[0] == 0)) {
      more = FALSE;
    }

    else if (!google_search_get_coord(vw, vvp, s_str, &new_center)) {
      vik_viewport_set_center_coord(vvp, &new_center);
      vik_layers_panel_emit_update(vlp);
      more = FALSE;
    }
    else if (!prompt_try_again(vw))
        more = FALSE;
    g_free(s_str);
  } while (more);
}
Commit	Line	Data
369126f3 QT	1	/*
	2	* viking -- GPS Data and Topo Analyzer, Explorer, and Manager
	3	*
	4	* Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	* Created by Quy Tonthat <qtonthat@gmail.com>
	21	*/
	22	#include <stdlib.h>
	23	#include <string.h>
	24	#include <glib/gprintf.h>
	25
	26	#include "viking.h"
	27	#include "curl_download.h"
	28
	29	#define GOOGLE_SEARCH_URL_FMT "http://maps.google.com/maps?q=%s&output=js"
844fde6c QT	30	#define GOOGLE_SEARCH_PATTERN_1 "{center:{lat:"
844fde6c QT	31	#define GOOGLE_SEARCH_PATTERN_2 ",lng:"
d1f48cc2	32	#define GOOGLE_SEARCH_NOT_FOUND "around this map area did not match any locations"
369126f3 QT	33
369126f3 QT	34	static gchar *last_search_str = NULL;
014128f6 QT	35	static VikCoord *last_coord = NULL;
	36	static gchar *last_successful_search_str = NULL;
	37
1a8143e6	38	static DownloadOptions googlesearch_options = { "http://maps.google.com/", 0 };
a3188993	39
014128f6 QT	40	gchar * a_googlesearch_get_search_string_for_this_place(VikWindow *vw)
014128f6 QT	41	{
812909d1 QT	42	if (!last_coord)
	43	return NULL;
	44
014128f6	45	VikViewport *vvp = vik_window_viewport(vw);
494eb388	46	const VikCoord *cur_center = vik_viewport_get_center(vvp);
014128f6 QT	47	if (vik_coord_equals(cur_center, last_coord)) {
	48	return(last_successful_search_str);
	49	}
	50	else
	51	return NULL;
	52	}
369126f3 QT	53
	54	static gboolean prompt_try_again(VikWindow *vw)
	55	{
	56	GtkWidget *dialog = NULL;
	57	gboolean ret = TRUE;
	58
	59	dialog = gtk_dialog_new_with_buttons ( "", GTK_WINDOW(vw), 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT, NULL );
	60	gtk_window_set_title(GTK_WINDOW(dialog), "Search");
	61
	62	GtkWidget *search_label = gtk_label_new("I don't know that place. Do you want another search?");
	63	gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), search_label, FALSE, FALSE, 5 );
	64	gtk_widget_show_all(dialog);
	65
	66	if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) != GTK_RESPONSE_ACCEPT )
	67	ret = FALSE;
	68
	69	gtk_widget_destroy(dialog);
	70	return ret;
	71	}
	72
	73	static gchar * a_prompt_for_search_string(VikWindow *vw)
	74	{
	75	GtkWidget *dialog = NULL;
	76
	77	dialog = gtk_dialog_new_with_buttons ( "", GTK_WINDOW(vw), 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT, NULL );
	78	gtk_window_set_title(GTK_WINDOW(dialog), "Search");
	79
	80	GtkWidget *search_label = gtk_label_new("Enter address or place name:");
	81	GtkWidget *search_entry = gtk_entry_new();
	82	if (last_search_str)
	83	gtk_entry_set_text(GTK_ENTRY(search_entry), last_search_str);
	84
	85	gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), search_label, FALSE, FALSE, 5 );
	86	gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), search_entry, FALSE, FALSE, 5 );
	87	gtk_widget_show_all(dialog);
	88
	89	if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) != GTK_RESPONSE_ACCEPT ) {
	90	gtk_widget_destroy(dialog);
	91	return NULL;
	92	}
	93
	94	gchar *search_str = g_strdup ( gtk_entry_get_text ( GTK_ENTRY(search_entry) ) );
	95
369126f3 QT	96	gtk_widget_destroy(dialog);
	97
	98	if (search_str[0] != '\0') {
	99	if (last_search_str)
	100	g_free(last_search_str);
	101	last_search_str = g_strdup(search_str);
	102	}
	103
	104	return(search_str); /* search_str needs to be freed by caller */
	105	}
	106
	107	static gboolean parse_file_for_latlon(gchar file_name, struct LatLon ll)
	108	{
	109	gchar text, pat;
	110	GMappedFile *mf;
	111	gsize len;
	112	gboolean found = TRUE;
	113	gchar lat_buf[32], lon_buf[32];
	114	gchar *s;
	115
369126f3 QT	116	lat_buf[0] = lon_buf[0] = '\0';
	117
	118	if ((mf = g_mapped_file_new(file_name, FALSE, NULL)) == NULL) {
	119	g_critical("couldn't map temp file\n");
	120	exit(1);
	121	}
	122	len = g_mapped_file_get_length(mf);
	123	text = g_mapped_file_get_contents(mf);
	124
d1f48cc2 QT	125	if (g_strstr_len(text, len, GOOGLE_SEARCH_NOT_FOUND) != NULL) {
	126	found = FALSE;
	127	goto done;
	128	}
	129
369126f3	130	if ((pat = g_strstr_len(text, len, GOOGLE_SEARCH_PATTERN_1)) == NULL) {
369126f3 QT	131	found = FALSE;
	132	goto done;
	133	}
369126f3 QT	134	pat += strlen(GOOGLE_SEARCH_PATTERN_1);
	135	s = lat_buf;
	136	if (*pat == '-')
	137	s++ = pat++;
	138	while ((s < (lat_buf + sizeof(lat_buf))) && (pat < (text + len)) &&
	139	(g_ascii_isdigit(pat) \|\| (pat == '.')))
	140	s++ = pat++;
	141	*s = '\0';
	142	if ((pat >= (text + len)) \|\| (lat_buf[0] == '\0')) {
	143	found = FALSE;
	144	goto done;
	145	}
	146
	147	if (strncmp(pat, GOOGLE_SEARCH_PATTERN_2, strlen(GOOGLE_SEARCH_PATTERN_2))) {
	148	found = FALSE;
	149	goto done;
	150	}
369126f3 QT	151
	152	pat += strlen(GOOGLE_SEARCH_PATTERN_2);
	153	s = lon_buf;
	154
	155	if (*pat == '-')
	156	s++ = pat++;
	157	while ((s < (lon_buf + sizeof(lon_buf))) && (pat < (text + len)) &&
	158	(g_ascii_isdigit(pat) \|\| (pat == '.')))
	159	s++ = pat++;
	160	*s = '\0';
	161	if ((pat >= (text + len)) \|\| (lon_buf[0] == '\0')) {
	162	found = FALSE;
	163	goto done;
	164	}
	165
	166	ll->lat = g_ascii_strtod(lat_buf, NULL);
	167	ll->lon = g_ascii_strtod(lon_buf, NULL);
	168
369126f3 QT	169	done:
369126f3 QT	170	g_mapped_file_free(mf);
369126f3 QT	171	return (found);
	172
	173	}
	174
	175	gchar uri_escape(gchar str)
	176	{
	177	gchar esc_str = g_malloc(3strlen(str));
	178	gchar *dst = esc_str;
	179	gchar *src;
	180
	181	for (src = str; *src; src++) {
	182	if (*src == ' ')
	183	*dst++ = '+';
	184	else if (g_ascii_isalnum(*src))
	185	dst++ = src;
	186	else {
	187	g_sprintf(dst, "%%%02X", *src);
	188	dst += 3;
	189	}
	190	}
	191
	192	return(esc_str);
	193	}
	194
	195	static int google_search_get_coord(VikWindow vw, VikViewport vvp, gchar srch_str, VikCoord coord)
	196	{
	197	FILE *tmp_file;
	198	int tmp_fd;
	199	gchar *tmpname;
	200	gchar *uri;
	201	gchar *escaped_srch_str;
	202	int ret = 0; /* OK */
	203	struct LatLon ll;
	204
	205	escaped_srch_str = uri_escape(srch_str);
	206
d1f48cc2	207	if ((tmp_fd = g_file_open_tmp ("vikgsearch.XXXXXX", &tmpname, NULL)) == -1) {
369126f3 QT	208	g_critical("couldn't open temp file\n");
	209	exit(1);
	210	}
	211
	212	tmp_file = fdopen(tmp_fd, "r+");
	213	//uri = g_strdup_printf(GOOGLE_SEARCH_URL_FMT, srch_str);
	214	uri = g_strdup_printf(GOOGLE_SEARCH_URL_FMT, escaped_srch_str);
	215
369126f3	216	/* TODO: curl may not be available */
a3188993	217	if (curl_download_uri(uri, tmp_file, &googlesearch_options)) { /* error */
369126f3 QT	218	fclose(tmp_file);
	219	ret = -1;
	220	goto done;
	221	}
	222
	223	fclose(tmp_file);
	224	if (!parse_file_for_latlon(tmpname, &ll)) {
	225	ret = -1;
	226	goto done;
	227	}
	228
	229	vik_coord_load_from_latlon ( coord, vik_viewport_get_coord_mode(vvp), &ll );
	230
014128f6 QT	231	if (last_coord)
	232	g_free(last_coord);
	233	last_coord = g_malloc(sizeof(VikCoord));
	234	last_coord = coord;
	235	if (last_successful_search_str)
	236	g_free(last_successful_search_str);
	237	last_successful_search_str = g_strdup(last_search_str);
	238
369126f3 QT	239	done:
	240	g_free(escaped_srch_str);
	241	g_free(uri);
	242	remove(tmpname);
	243	g_free(tmpname);
	244	return ret;
	245	}
	246
	247	void a_google_search(VikWindow vw, VikLayersPanel vlp, VikViewport *vvp)
	248	{
	249	VikCoord new_center;
	250	gchar *s_str;
	251	gboolean more = TRUE;
	252
	253	do {
	254	s_str = a_prompt_for_search_string(vw);
	255	if ((!s_str) \|\| (s_str[0] == 0)) {
	256	more = FALSE;
	257	}
	258
	259	else if (!google_search_get_coord(vw, vvp, s_str, &new_center)) {
	260	vik_viewport_set_center_coord(vvp, &new_center);
	261	vik_layers_panel_emit_update(vlp);
	262	more = FALSE;
	263	}
	264	else if (!prompt_try_again(vw))
	265	more = FALSE;
	266	g_free(s_str);
	267	} while (more);
	268	}
	269