readr

Minimal RSS reader (WIP)
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feeds.c (2246B)

      1 #include "feeds.h"
      2 
      3 #include <_string.h>
      4 #include <mrss.h>
      5 #include <stdlib.h>
      6 #include <string.h>
      7 
      8 #include "config.h"
      9 #include "utils.h"
     10 #include "db.h"
     11 
     12 void fetch_feed(feed_t*, char*);
     13 static void populate_feed(feed_t*);
     14 
     15 app_t
     16 load_app(char* contents)
     17 {
     18 	app_t app = {
     19 		.feeds_cap = FEEDS_CAP,
     20 		.feeds = ecalloc(FEEDS_CAP, sizeof(char*)),
     21 	};
     22 
     23 	remove_all_chars(contents, '\r');
     24 	char* line = strtok(contents, "\n");
     25 
     26 	while (line != NULL) {
     27 		feed_t* feed = (feed_t*)ecalloc(1, sizeof(feed_t));
     28 
     29 		fetch_feed(feed, line); // gets the content and loads it into db
     30 		printf(".");
     31 		fflush(stdout);
     32 
     33 		populate_feed(feed); // fetch back from db top 100
     34 
     35 		if (app.feeds_cap == app.feeds_len) {
     36 			app.feeds_cap *= 2;
     37 			app.feeds = realloc(app.feeds, app.feeds_cap);
     38 		}
     39 		app.feeds[app.feeds_len++] = feed;
     40 		line = strtok(NULL, "\n");
     41 	}
     42 
     43 	return app;
     44 }
     45 
     46 void
     47 fetch_feed(feed_t* feed, char* url)
     48 {
     49 	*feed = (feed_t) { .url = url, /*.posts_cap = POSTS_CAP*/ };
     50 
     51 	static mrss_t* rss = NULL;
     52 	mrss_error_t rc = mrss_parse_url(url, &rss);
     53 
     54 	if (rc != MRSS_OK || rss == NULL) {
     55 		char short_url[FEEDS_CAP - 1];
     56 		strncpy(short_url, url, FEEDS_CAP - 2);
     57 		short_url[FEEDS_CAP - 2] = '\0';
     58 		asprintf(&feed->title, "%s%s", "(bad) ", short_url);
     59 		return;
     60 	}
     61 
     62 	feed->title = (rss->title != NULL) ? strndup(rss->title, FEED_CAP) : "Unknown feed";
     63 
     64 	for (mrss_item_t* it = rss->item; it; it = it->next) {
     65 		char* title = (it->title && *it->title) ? it->title : "";
     66 		char* link = (it->link && *it->link) ? it->link : "";
     67 		char* comments = (it->comments && *it->comments) ? it->comments : "";
     68 		char* desc = (it->description && *it->description) ? it->description : "";
     69 		char* date = (it->pubDate && *it->pubDate) ? it->pubDate : "";
     70 		// char* author = (it->author && *it->author) ? it->author : "";
     71 
     72 		remove_all_tags(desc);
     73 
     74 		db_post_t db_post = {
     75 			.title = title,
     76 			.link = link,
     77 			.comments = comments,
     78 			.pub_date = date,
     79 			.summary = desc,
     80 			.feed_url = url,
     81 		};
     82 
     83 		db_insert_post(db_post);
     84 	}
     85 
     86 	mrss_free(rss);
     87 }
     88 
     89 static void
     90 populate_feed(feed_t* feed)
     91 {
     92 	const char* url = feed->url;
     93 	db_fetch_post_t dbposts = db_fetch_posts(url);
     94 	if (!dbposts.success) return;
     95 	feed->posts = dbposts.posts;
     96 	feed->posts_len = dbposts.count;
     97 }