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