src/lyrics_leoslyrics.c

   1 #include "src_lyrics.h"
   2 #include "easy_download.h"
   3 #include <expat.h>
   4 #include <string.h>
   5 #include "options.h"
   6
   7 #define LEOSLYRICS_SEARCH_URL "http://api.leoslyrics.com/api_search.php?auth=ncmpc&artist=%s&songtitle=%s"
   8 #define LEOSLYRICS_CONTENT_URL "http://api.leoslyrics.com/api_lyrics.php?auth=ncmpc&hid=%s"
   9 #define CREDITS "Lyrics provided by www.LeosLyrics.com"
  10
  11 char *hid;
  12 XML_Parser parser, contentp;
  13
  14 int check_dl_progress(void *clientp, double dltotal, double dlnow,
  15                         double ultotal, double ulnow)
  16 {
  17         if(g_timer_elapsed(dltime, NULL) >= options.lyrics_timeout || lock == 4)
  18         {
  19                 formed_text_init(&lyr_text);
  20                 return -1;
  21         }
  22
  23         return 0;
  24 }
  25
  26
  27
  28 static void check_content(void *data, const char *name, const char **atts)
  29 {
  30         if(strstr(name, "text") != NULL)
  31         {
  32
  33                 result |= 16;
  34         }
  35 }
  36
  37
  38 static void check_search_response(void *data, const char *name,
  39                  const char **atts)
  40 {
  41         if(strstr(name, "response") != NULL)
  42         {
  43         result |=2;
  44         return;
  45         }
  46
  47         if(result & 4)
  48         {
  49                 if(strstr(name, "result") != NULL)
  50                 {
  51                         if(strstr(atts[2], "hid") != NULL)
  52                         {
  53                                 hid = strdup (atts[3]);
  54                         }
  55
  56                         if(strstr(atts[2], "exactMatch") != NULL)
  57                         {
  58                                 result |= 8;
  59                         }
  60                 }
  61         }
  62
  63 }
  64
  65 static void end_tag(void *data, const char *name)
  66 {
  67   //hmmmmmm
  68 }
  69
  70   static void check_search_success(void *userData, const XML_Char *s, int len)
  71     {
  72         if(result & 2)  //lets first check whether we're right
  73         {               //we don't really want to search in the wrong string
  74                 if(strstr((char*) s, "SUCCESS"))
  75                 {
  76                 result |=4;
  77                 }
  78         }
  79     }
  80
  81 static void fetch_text(void *userData, const XML_Char *s, int len)
  82 {
  83         if(result & 16)
  84         {
  85                 if (s[0] == 13 ) return; //ignore any single carriage returns
  86                 add_text_line(&lyr_text, s, len);
  87         }
  88 }
  89
  90 /*int deregister_lyr_leoslyrics ()
  91 {
  92
  93 }*/
  94
  95 int check_lyr_leoslyrics(char *artist, char *title, char *url)
  96 {
  97         char url_avail[256];
  98         CURL *curl = curl_easy_init ();
  99
 100
 101         //this replacess the whitespaces with '+'
 102         char *esc_title = curl_easy_escape (curl, title, 0);
 103         char *esc_artist = curl_easy_escape (curl, artist, 0);
 104         //we insert the artist and the title into the url
 105         snprintf(url_avail, 512, LEOSLYRICS_SEARCH_URL, esc_artist, esc_title);
 106
 107         //download that xml!
 108         easy_download_struct lyr_avail = {NULL, 0,-1};
 109
 110         g_timer_start(dltime);
 111         if(!easy_download(url_avail, &lyr_avail, check_dl_progress)) return -1;
 112         g_timer_stop(dltime);
 113
 114         //we gotta parse that stuff with expat
 115         parser = XML_ParserCreate(NULL);
 116         XML_SetUserData(parser, NULL);
 117
 118         XML_SetElementHandler(parser, check_search_response, end_tag);
 119         XML_SetCharacterDataHandler(parser, check_search_success);
 120         XML_Parse(parser, lyr_avail.data, strlen(lyr_avail.data), 0);
 121         XML_ParserFree(parser);
 122
 123         if(!(result & 4)) return -1; //check whether lyrics found
 124
 125         char *esc_hid = curl_easy_escape (curl, hid, 0);
 126         free (hid);
 127
 128         snprintf(url, 512, LEOSLYRICS_CONTENT_URL, esc_hid);
 129
 130         return 0;
 131 }
 132
 133 int get_lyr_leoslyrics(char *artist, char *title)
 134 {
 135         char url_hid[256];
 136         if(dltime == NULL) dltime = g_timer_new();
 137
 138         if(check_lyr_leoslyrics(artist, title, url_hid) != 0) return -1;
 139
 140         easy_download_struct lyr_content = {NULL, 0,-1};
 141         g_timer_continue(dltime);
 142         if(!(easy_download(url_hid, &lyr_content, check_dl_progress))) return -1;
 143         g_timer_stop(dltime);
 144
 145         contentp = XML_ParserCreate(NULL);
 146         XML_SetUserData(contentp, NULL);
 147         XML_SetElementHandler(contentp, check_content, end_tag);
 148         XML_SetCharacterDataHandler(contentp, fetch_text);
 149         XML_Parse(contentp, lyr_content.data, strlen(lyr_content.data), 0);
 150         XML_ParserFree(contentp);
 151
 152         return 0;
 153
 154 }
 155 int register_lyr_leoslyrics (src_lyr *source_descriptor)
 156 {
 157   source_descriptor->check_lyr = check_lyr_leoslyrics;
 158   source_descriptor->get_lyr = get_lyr_leoslyrics;
 159
 160   source_descriptor->name = "Leoslyrics";
 161   source_descriptor->description = "powered by http://www.leoslyrics.com";
 162 }