vcs.maemo.org Git - beifahrer/blob - src/adac-mitfahrclub.vala

   1 /* This file is part of Beifahrer.
   2  *
   3  * Copyright (C) 2010 Philipp Zabel
   4  *
   5  * Beifahrer is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * Beifahrer is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with Beifahrer. If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 [Compact]
  20 public class City {
  21         public int number;
  22         public string name;
  23         public double latitude;
  24         public double longitude;
  25         public double north;
  26         public double south;
  27         public double east;
  28         public double west;
  29
  30         public City (int _number, string _name) {
  31                 number = _number;
  32                 name = _name;
  33                 latitude = 0.0;
  34                 longitude = 0.0;
  35         }
  36
  37         internal double bb_area () {
  38                 return (north - south) * (east - west);
  39         }
  40 }
  41
  42 public enum LiftFlags {
  43         SMOKER = 1,
  44         NON_SMOKER = 2,
  45         ADAC_MEMBER = 4,
  46         WOMEN_ONLY = 8
  47 }
  48
  49 public class Lift : Object {
  50         public string city_from;
  51         public string city_to;
  52         public Time time;
  53         public int places;
  54         public string price;
  55         public LiftFlags flags;
  56
  57         public string href;
  58
  59         public List<string> city_via;
  60         public string name;
  61         public string cell;
  62         public string phone;
  63         public string phone2;
  64         public string email;
  65         public string description;
  66         public string modified;
  67
  68         public Lift () {
  69                 time.hour = -1;
  70         }
  71 }
  72
  73 public class CallbackMessage : Soup.Message {
  74         public SourceFunc callback;
  75
  76         public CallbackMessage (string url, SourceFunc? _callback) {
  77                 method = "GET";
  78                 callback = _callback;
  79                 set_uri (new Soup.URI (url));
  80         }
  81 }
  82
  83 public class AdacMitfahrclub {
  84         const string BASE_URI = "http://mitfahrclub.adac.de";
  85
  86         Soup.SessionAsync session;
  87         List<City> city_list = null;
  88
  89         public AdacMitfahrclub () {
  90                 session = new Soup.SessionAsync ();
  91         }
  92
  93         private void message_finished (Soup.Session session, Soup.Message message) {
  94                 Idle.add (((CallbackMessage) message).callback);
  95         }
  96
  97         private async Html.Doc* get_html_document (string url) {
  98                 var message = new CallbackMessage (url, get_html_document.callback);
  99                 session.queue_message (message, message_finished);
 100
 101                 yield;
 102
 103                 return Html.Doc.read_memory ((char[]) message.response_body.data, (int) message.response_body.length,
 104                                              url, null, Html.ParserOption.NOERROR | Html.ParserOption.NOWARNING);
 105         }
 106
 107         private void save_city_list () {
 108                 FileStream list_file = FileStream.open ("/home/user/.cache/beifahrer/city_list", "w");
 109                 if (list_file == null)
 110                         return;
 111
 112                 foreach (unowned City city in city_list) {
 113                         if (city.north != 0.0 || city.south != 0.0 || city.east != 0.0 || city.west != 0.0)
 114                                 list_file.printf ("%d\t%s\t%f\t%f\t%f\t%f\t%f\t%f\n", city.number, city.name, city.latitude, city.longitude, city.north, city.south, city.east, city.west);
 115                         else if (city.latitude != 0.0 || city.longitude != 0.0)
 116                                 list_file.printf ("%d\t%s\t%f\t%f\n", city.number, city.name, city.latitude, city.longitude);
 117                         else
 118                                 list_file.printf ("%d\t%s\n", city.number, city.name);
 119                 }
 120         }
 121
 122         private bool load_city_list () {
 123                 FileStream list_file = FileStream.open ("/home/user/.cache/beifahrer/city_list", "r");
 124                 if (list_file == null)
 125                         list_file = FileStream.open ("/usr/share/beifahrer/city_list", "r");
 126                 if (list_file == null)
 127                         return false;
 128
 129                 city_list = new List<City> ();
 130                 string line = list_file.read_line ();
 131                 while (line != null) {
 132                         var split_line = line.split ("\t");
 133                         if (split_line.length < 2)
 134                                 continue;
 135                         int number = split_line[0].to_int ();
 136                         weak string name = split_line[1];
 137
 138                         var city = new City (number, name);
 139                         if (split_line.length >= 4) {
 140                                 city.latitude = split_line[2].to_double ();
 141                                 city.longitude = split_line[3].to_double ();
 142                         }
 143                         if (split_line.length >= 8) {
 144                                 city.north = split_line[4].to_double ();
 145                                 city.south = split_line[5].to_double ();
 146                                 city.east = split_line[6].to_double ();
 147                                 city.west = split_line[7].to_double ();
 148                         }
 149                         city_list.append ((owned) city);
 150
 151                         line = list_file.read_line ();
 152                 }
 153
 154                 return true;
 155         }
 156
 157         public unowned List<City>? get_city_list () {
 158                 if (city_list != null)
 159                         return city_list;
 160
 161                 if (load_city_list ())
 162                         return city_list;
 163
 164                 return null;
 165         }
 166
 167         public async unowned List<City>? download_city_list () {
 168                 var doc = yield get_html_document (BASE_URI);
 169                 if (doc == null) {
 170                         stderr.printf ("Error: parsing failed\n");
 171                         return null;
 172                 }
 173
 174                 var form = search_tag_by_id (doc->children, "form", "search_national_form");
 175                 if (form == null) {
 176                         stderr.printf ("Error: does not contain search_national_form\n");
 177                         return null;
 178                 }
 179
 180                 var select = search_tag_by_name (form->children, "select", "city_from");
 181                 if (select == null) {
 182                         stderr.printf ("Error: does not contain city_from\n");
 183                         return null;
 184                 }
 185
 186                 city_list = new List<City> ();
 187                 for (var n = select->children; n != null; n = n->next) {
 188                         if (n->name == "option" && n->children != null && n->children->name == "text") {
 189                                 int number = n->get_prop ("value").to_int ();
 190                                 // Skip 0 "Alle St.dte"
 191                                 if (number == 0)
 192                                         continue;
 193                                 var city = new City(number,
 194                                                     n->children->content);
 195                                 city_list.append ((owned) city);
 196                         }
 197                 }
 198
 199                 // TODO: get coordinates
 200
 201                 save_city_list ();
 202
 203                 return city_list;
 204         }
 205
 206         private int get_city_number (string name) {
 207                 foreach (unowned City city in city_list) {
 208                         if (city.name == name)
 209                                 return city.number;
 210                 }
 211                 return 0;
 212         }
 213
 214         public unowned City find_nearest_city (double latitude, double longitude) {
 215                 unowned City result = null;
 216                 double min_distance = 0.0;
 217                 bool in_result = false;
 218
 219                 foreach (unowned City city in city_list) {
 220                         double lat = latitude - city.latitude;
 221                         double lng = longitude - city.longitude;
 222                         double distance = lat * lat + lng * lng;
 223                         bool in_city = ((city.south <= latitude <= city.north) &&
 224                                         (city.west <= longitude <= city.east));
 225
 226                         if ((result == null) ||
 227                             (in_city && !in_result) ||
 228                             (in_city && in_result && distance / city.bb_area () < min_distance / result.bb_area ()) ||
 229                             (!in_city && !in_result && distance < min_distance)) {
 230                                 result = city;
 231                                 min_distance = distance;
 232                                 in_result = in_city;
 233                         }
 234                 }
 235
 236                 return result;
 237         }
 238
 239         public async List<Lift>? get_lift_list (string city_from, int radius_from, string city_to, int radius_to, Date date, int tolerance = 0) {
 240                 if (city_list == null)
 241                         get_city_list ();
 242
 243                 int num_from = get_city_number (city_from);
 244                 if (num_from == 0) {
 245                         stderr.printf ("Unknown city: %s\n", city_to);
 246                         return null;
 247                 }
 248
 249                 int num_to = get_city_number (city_to);
 250                 if (num_to == 0) {
 251                         stderr.printf ("Unknown city: %s\n", city_to);
 252                         return null;
 253                 }
 254
 255                 string url = BASE_URI + "/mitfahrclub/%s/%s/b.html".printf (
 256                         city_from,
 257                         city_to
 258                 );
 259
 260                 url += "?type=b&city_from=%d&radius_from=%d&city_to=%d&radius_to=%d".printf (
 261                         num_from,
 262                         radius_from,
 263                         num_to,
 264                         radius_to
 265                 );
 266
 267                 url += "&date=date&day=%d&month=%d&year=%d&tolerance=%d&smoking=&avg_speed=&".printf (
 268                         date.get_day (),
 269                         date.get_month (),
 270                         date.get_year (),
 271                         tolerance
 272                 );
 273
 274                 var doc = yield get_html_document (url);
 275                 if (doc == null) {
 276                         stderr.printf ("Error: parsing failed\n");
 277                         return null;
 278                 }
 279
 280                 var table = search_tag_by_class (doc->children, "table", "list p_15");
 281                 if (table == null) {
 282                         stderr.printf ("Error: does not contain list p_15 table\n");
 283                         return null;
 284                 }
 285
 286                 var list = new List<Lift> ();
 287                 for (var n = table->children; n != null; n = n->next) {
 288                         if (n->name == "tr") {
 289                                 var lift = parse_lift_row (n->children);
 290                                 if (lift.city_from != null) // Skip the title row
 291                                         list.append ((owned) lift);
 292                         }
 293                 }
 294
 295                 // Error message?
 296                 var div = table->next;
 297                 if (div != null && div->get_prop ("class") == "error-message") {
 298                         if (div->children == null || div->children->content == null ||
 299                             !div->children->content.has_prefix ("Es sind leider noch keine Einträge vorhanden.")) {
 300                                 stderr.printf ("Got an unknown error message!\n");
 301                                 if (div->children != null && div->children->content != null)
 302                                         stderr.printf ("\"%s\"\n", div->children->content);
 303                         }
 304                 }
 305
 306                 return list;
 307         }
 308
 309         Lift parse_lift_row (Xml.Node* node) {
 310                 var lift = new Lift ();
 311                 int i = 0;
 312                 for (var n = node; n != null; n = n->next) {
 313                         if (n->name == "td") {
 314                                 var n2 = n->children;
 315                                 if (n2 != null) {
 316                                         if (n2->name == "a") {
 317                                                 var href = n2->get_prop ("href");
 318                                                 if (href != null && lift.href == null)
 319                                                         lift.href = href;
 320                                                 var n3 = n2->children;
 321                                                 while (n3 != null) {
 322                                                         if (n3->name == "text")
 323                                                                 switch (i) {
 324                                                                 case 0:
 325                                                                         lift.city_from = n3->content;
 326                                                                         break;
 327                                                                 case 1:
 328                                                                         lift.city_to = n3->content;
 329                                                                         break;
 330                                                                 case 2:
 331                                                                         parse_date (n3->content, out lift.time);
 332                                                                         break;
 333                                                                 case 3:
 334                                                                         parse_time (n3->content.strip (), out lift.time);
 335                                                                         break;
 336                                                                 case 4:
 337                                                                         lift.places = n3->content.to_int ();
 338                                                                         break;
 339                                                                 case 5:
 340                                                                         lift.price = n3->content;
 341                                                                         break;
 342                                                                 default:
 343                                                                         print ("TEXT:%s\n", n3->content);
 344                                                                         break;
 345                                                                 }
 346                                                         if (n3->name == "span") {
 347                                                                 string class = n3->get_prop ("class");
 348                                                                 if (class == "icon_smoker")
 349                                                                         lift.flags |= LiftFlags.SMOKER;
 350                                                                 else if (class == "icon_non_smoker")
 351                                                                         lift.flags |= LiftFlags.NON_SMOKER;
 352                                                                 else if (class == "icon_adac")
 353                                                                         lift.flags |= LiftFlags.ADAC_MEMBER;
 354                                                                 else if (class == "icon_women")
 355                                                                         lift.flags |= LiftFlags.WOMEN_ONLY;
 356                                                                 else if (class != null)
 357                                                                         print ("SPAN %s\n", class);
 358                                                         }
 359                                                         n3 = n3->next;
 360                                                 }
 361                                         }
 362                                 }
 363                                 i++;
 364                         }
 365                 }
 366
 367                 return lift;
 368         }
 369
 370         public async bool update_lift_details (Lift lift) {
 371                 string url = BASE_URI + lift.href;
 372
 373                 var doc = yield get_html_document (url);
 374                 if (doc == null) {
 375                         stderr.printf ("Error: parsing failed\n");
 376                         return false;
 377                 }
 378
 379                 var table = search_tag_by_class (doc->children, "table", "lift");
 380                 if (table == null) {
 381                         stderr.printf ("Error: does not contain lift table\n");
 382                         return false;
 383                 }
 384
 385                 Xml.Node* n;
 386                 for (n = table->children; n != null; n = n->next) {
 387                         if (n->name == "tr") {
 388                                 var n2 = n->children;
 389                                 if (n2 == null || n2->name != "td" ||
 390                                     n2->children == null || n2->children->name != "text")
 391                                         continue;
 392
 393                                 string text = n2->children->content;
 394
 395                                 if (text != "Strecke & Infos" && text != "&nbsp;" && !text.has_prefix ("\xc2\xa0") &&
 396                                     text != "Datum" &&
 397                                     text != "Freie Pl\xc3\xa4tze" &&
 398                                     text != "Name" &&
 399                                     text != "Handy" &&
 400                                     text != "Telefon" &&
 401                                     text != "Telefon 2" &&
 402                                     text != "E-Mail 1" &&
 403                                     text != "Details" &&
 404                                     text != "Beschreibung")
 405                                         continue;
 406
 407                                 n2 = n2->next;
 408                                 if (n2 == null)
 409                                         continue;
 410
 411                                 // Skip text between td nodes
 412                                 if (n2->name == "text")
 413                                         n2 = n2->next;
 414
 415                                 if (n2 == null || n2->name != "td" || n2->children == null)
 416                                         continue;
 417
 418                                 if (n2->children->name == "img") {
 419                                         // FIXME: email image
 420                                         // n2->children->get_prop ("src"))
 421                                         continue;
 422                                 }
 423
 424                                 if (n2->children->name == "div" && text == "Beschreibung") {
 425                                         var n3 = n2->children->children;
 426                                         lift.description = "";
 427                                         while (n3 != null) {
 428                                                 if (n3->name == "text")
 429                                                         lift.description += n3->content.strip () + "\n";
 430                                                 n3 = n3->next;
 431                                         }
 432                                         continue;
 433                                 } else if (n2->children->name != "text") {
 434                                         continue;
 435                                 }
 436
 437                                 var text1 = n2->children->content.strip ();
 438
 439                                 if (text == "Freie Pl\xc3\xa4tze")
 440                                         lift.places = text1.to_int ();
 441                                 else if (text == "Name")
 442                                         lift.name = text1;
 443                                 else if (text == "Handy")
 444                                         lift.cell = text1;
 445                                 else if (text == "Telefon")
 446                                         lift.phone = text1;
 447                                 else if (text == "Telefon 2")
 448                                         lift.phone2 = text1;
 449                                 else if (text == "E-Mail 1")
 450                                         lift.email = text1;
 451                                 else if (text != "Strecke & Infos" && text != "&nbsp;" &&
 452                                     !text.has_prefix ("\xc2\xa0") && text != "Datum" &&
 453                                     text != "Details")
 454                                         continue;
 455
 456                                 n2 = n2->next;
 457                                 if (n2 == null)
 458                                         continue;
 459
 460                                 // Skip text between td nodes
 461                                 if (n2->name == "text")
 462                                         n2 = n2->next;
 463
 464                                 if (n2 == null || n2->name != "td" ||
 465                                     n2->children == null)
 466                                         continue;
 467
 468                                 if (n2->children->name == "span" &&
 469                                     n2->children->get_prop ("class") == "icon_non_smoker") {
 470                                         lift.flags |= LiftFlags.NON_SMOKER;
 471                                         continue;
 472                                 } else if (n2->children->name == "span" &&
 473                                     n2->children->get_prop ("class") == "icon_smoker") {
 474                                         lift.flags |= LiftFlags.SMOKER;
 475                                         continue;
 476                                 } else if (n2->children->name != "text")
 477                                         continue;
 478
 479                                 var text2 = n2->children->content.strip ();
 480
 481                                 if (text1 == "von")
 482                                         lift.city_from = text2;
 483                                 else if (text1.has_prefix ("\xc3\xbc"))
 484                                         lift.city_via.append (text2);
 485                                 else if (text1 == "nach")
 486                                         lift.city_to = text2;
 487                                 else if (text1 == "Datum")
 488                                         parse_date (text2, out lift.time);
 489                                 else if (text1 == "Uhrzeit")
 490                                         parse_time (text2, out lift.time);
 491                                 else if (text1 == "Raucher")
 492                                         print ("Raucher: %s\n", text2);
 493                                 else if (text1 == "Fahrpreis")
 494                                         lift.price = text2;
 495                                 else if (text1 == "ADAC-Mitglied" && text2 != "nein")
 496                                         lift.flags |= LiftFlags.ADAC_MEMBER;
 497                         }
 498                 }
 499
 500                 // The paragraph after the table contains the date of last modification
 501                 var p = table->next;
 502                 for (n = p->children; n != null; n = n->next) {
 503                         if (n->name != "text")
 504                                 continue;
 505
 506                         var s = n->content.strip ();
 507                         if (s.has_prefix ("Letztmalig aktualisiert am "))
 508                                 lift.modified = s.offset (27).dup (); // "Do 15.04.2010 20:32"
 509                 }
 510
 511                 return true;
 512         }
 513
 514         Xml.Node* search_tag_by_property (Xml.Node* node, string tag, string prop, string val) requires (node != null) {
 515                 for (var n = node; n != null; n = n->next) {
 516                         if (n->name == tag && n->get_prop (prop) == val)
 517                                 return n;
 518                         if (n->children != null) {
 519                                 var found = search_tag_by_property (n->children, tag, prop, val);
 520                                 if (found != null)
 521                                         return found;
 522                         }
 523                 }
 524                 return null;
 525         }
 526
 527         Xml.Node* search_tag_by_id (Xml.Node* node, string tag, string id) requires (node != null) {
 528                 return search_tag_by_property (node, tag, "id", id);
 529         }
 530
 531         Xml.Node* search_tag_by_name (Xml.Node* node, string tag, string name) requires (node != null) {
 532                 return search_tag_by_property (node, tag, "name", name);
 533         }
 534
 535         Xml.Node* search_tag_by_class (Xml.Node* node, string tag, string @class) requires (node != null) {
 536                 return search_tag_by_property (node, tag, "class", @class);
 537         }
 538
 539         void parse_date (string date, out Time time) {
 540                 int year;
 541                 if (date.length == 11)
 542                         date = date.offset (3);
 543                 if (date.length != 8)
 544                         return;
 545                 var res = date.scanf ("%02d.%02d.%02d", out time.day, out time.month, out year);
 546                 time.year = year + 2000;
 547         }
 548
 549         void parse_time (string time, out Time result) {
 550                 var res = time.scanf ("%d.%02d Uhr", out result.hour, out result.minute);
 551         }
 552 }