WIP: parse both atom and rss feeds

Signed-off-by: William Brawner <me@wbrawner.com>

.gitignore

@@ -6,3 +6,4 @@ out/
 tmp/
 *.sln
 *.swp
+tags

src/feader.c

@@ -10,26 +10,23 @@
 #include <stdlib.h>
 #include <string.h>
 
-int main(int argc, char **argv) {
+int main(int argc, char** argv) {
     if (argc < 2) {
         printf("Please provide the URL of a feed to parse.\n");
         return 1;
     } else {
         printf("Attempting to retrieve XML for URL: %s\n", argv[1]);
     }
-    
-    sqlite3 *db;
+
+    sqlite3* db;
     setup_database(db);
-
     fead_xml(argv[1]);
-
     close_database(db);
-
     return 0;
 }
 
 void fead_xml(char* url) {
-    xml *x = malloc(sizeof(xml));
+    xml* x = malloc(sizeof(xml));
     get_xml_ptr(x, url);
 
     int res = get_xml(x);
@@ -37,13 +34,9 @@ void fead_xml(char* url) {
         printf("XML data retrieved from server\n");
     } else {
         printf("Unable to retrieve XML for URL: %s\n", x->url);
-        printf("%s\n", x->errBuf);
     }
-
     parse_xml_items(x);
-
     print_xml_elements(x);
-
     cleanup_xml(x);
 }
 
@@ -54,101 +47,125 @@ void get_xml_ptr(xml* x, char* url) {
     x->url = url;
 }
 
-size_t my_write_callback(char *ptr, size_t size, size_t nmemb, xml *x) {
+size_t my_write_callback(char* ptr, size_t size, size_t nmemb, xml* x) {
     int byte_size = (size * nmemb);
-    printf("byte_size: %d\n", byte_size);
     int new_size = x->size + byte_size;
-    printf("new_size size: %d\n", new_size);
     x->data = realloc(x->data, new_size + 1);
     memcpy(x->data + x->size, ptr, byte_size);
     x->data[new_size] = '\0';
     x->size = new_size;
-    printf("New xml size: %d\n", x->size);
     return byte_size;
 }
 
 size_t get_xml(xml* x) {
-    CURL *curl = curl_easy_init();
+    CURL* curl = curl_easy_init();
 
     if (!curl) {
         printf("Unable to instantiate curl object. Aborting");
         return 1;
-    } 
+    }
 
     curl_easy_setopt(curl, CURLOPT_URL, x->url);
-    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, *my_write_callback);
+    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_write_callback);
     curl_easy_setopt(curl, CURLOPT_WRITEDATA, x);
-    curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, x->errBuf);
     curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
+    // curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
     CURLcode res = curl_easy_perform(curl);
     curl_easy_cleanup(curl);
     curl_global_cleanup();
     return res;
 }
 
-void parse_xml_items(xml *x) {
+void parse_xml_items(xml* x) {
     xmlChar* xChar = xmlCharStrndup(x->data, x->size);
-    x->xdp = xmlReadDoc(
-            xChar,
-            x->url,
-            NULL,
-            XML_PARSE_RECOVER
-            );
+    x->xdp = xmlReadDoc(xChar, x->url, NULL, XML_PARSE_RECOVER);
     xmlFree(xChar);
 }
 
+void parse_entry(xmlNode *root) {
+
+}
+
+article * parse_item(xmlNode *item) {
+    printf("Article info:\n");
+    do {
+        if (strncmp("text", item->name, strlen(item->name)) != 0) {
+            if (strlen(item->children->content) > 200) {
+                printf("%s: %ld chars\n", item->name,
+                        strlen(item->children->content));
+            } else {
+                printf("%s: %s\n", item->name, item->children->content);
+            }
+        }
+        item = item->next;
+    } while (item != NULL);
+    printf("\n");
+    return NULL;
+}
+
+feed * parse_feed(xmlNode *feed) {
+    while (feed && strcmp(feed->name, "entry") != 0) {
+        feed = feed->next;
+    }
+
+}
+
+feed * parse_rss(xmlNode *rss) {
+    xmlNode* channel = rss->children->next;
+    xmlNode* channelChild;
+    while (channel && strcmp(channel->name, "channel") != 0) {
+        channel = channel->next;
+    }
+    while (channelChild != NULL) {
+        if (strncmp("title", channelChild->name, strlen(channelChild->name) - 1) == 0) {
+            if (channelChild->children != NULL) {
+                printf("%s: %s\n", channelChild->name, channelChild->children->content);
+            }
+        } else if (strncmp("description", channelChild->name,
+                    strlen(channelChild->name)) == 0) {
+            if (channelChild->children != NULL) {
+                printf("%s: %s\n", channelChild->name, channelChild->children->content);
+            }
+        } else if (strncmp("item", channelChild->name,
+                    strlen(channelChild->name)) == 0) {
+            article *article = parse_item(channelChild->children);
+            // TODO: Store articles in array to return
+        }
+        channelChild = channelChild->next;
+    }
+}
+
 void print_xml_elements(xml* x) {
     if (x->xdp == NULL || x->xdp->children == NULL) {
         printf("Unable to parse XML\n");
     }
 
-    xmlNode* rss = x->xdp->children;
-    xmlNode* channel = rss->children->next;
-    xmlNode* channelChild = channel->children;
-    int articleCount = 0;
-    while (channelChild != NULL) {
-        if (strncmp("title", channelChild->name, strlen(channelChild->name)) == 0) {
-            if (channelChild->children != NULL) {
-                printf("%s: %s\n", channelChild->name, channelChild->children->content);
-            }
-        } else if (strncmp("description", channelChild->name, strlen(channelChild->name)) == 0) {
-            if (channelChild->children != NULL) {
-                printf("%s: %s\n", channelChild->name, channelChild->children->content);
-            }
-        } else if (strncmp("item", channelChild->name, strlen(channelChild->name)) == 0) {
-            articleCount++;
-            xmlNode* itemData = channelChild->children;
-            printf("Article info:\n");
-            do {
-                if (strncmp("text", itemData->name, strlen(itemData->name)) != 0) {
-                    if (strlen(itemData->children->content) > 200) {
-                        printf("%s: %ld chars\n", itemData->name, strlen(itemData->children->content));
-                    } else {
-                        printf("%s: %s\n", itemData->name, itemData->children->content);
-                    }
-                }
-                itemData = itemData->next;
-            } while (itemData != NULL);
-            printf("\n");
-        }
-        channelChild = channelChild->next;
+    xmlNode* root = x->xdp->children;
+    if (strcmp(root->name, "rss") == 0) {
+        parse_rss(root);
+    } else if (strcmp(root->name, "feed") == 0){
+        parse_feed(root);
+    } else {
+        printf("Unable to parse XML\n");
+        // TODO: Return error
+        return;
     }
 
-    rss = NULL;
-    channel = NULL;
+    int articleCount = 0;
 
-    printf("Found %d articles in the feed\n", articleCount);    
+    root = NULL;
+    printf("Found %d articles in the feed\n", articleCount);
 }
 
-void cleanup_xml(xml* x) { 
-    free(x->data);
-    free(x->errBuf);
-    xmlFreeDoc(x->xdp);
+void cleanup_xml(xml* x) {
+    if (!x) return;
+    if (x->data) free(x->data);
+    if (x->xdp) xmlFreeDoc(x->xdp);
     free(x);
 }
 
 void setup_database(sqlite3* handle) {
-    char* init_sql = 
+    char* init_sql =
 #include "schema.sql"
         ;
     char* err;
@@ -160,6 +177,4 @@ void setup_database(sqlite3* handle) {
     }
 }
 
-void close_database(sqlite3* handle) {
-    sqlite3_close(handle);
-}
+void close_database(sqlite3* handle) { sqlite3_close(handle); }

src/feader.h

@@ -8,7 +8,6 @@ typedef struct {
     int size;
     long totalSize;
     char *url;
-    char *errBuf;
     xmlDocPtr xdp;
 } xml;
 
@@ -19,11 +18,11 @@ typedef struct {
     long feed_id;
     char *author;
     bool is_favorite;
-    char *featured_image text;
-    char *content text;
-    char *excerpt text;
+    char *featured_image;
+    char *content;
+    char *excerpt;
     bool is_read;
-    char *published_date date;
+    char *published_date;
 } article;
 
 typedef struct {
@@ -33,11 +32,15 @@ typedef struct {
     char *feed_url;
     char *icon;
     bool is_favorite;
-    char *last_polled date;
+    char *last_polled;
     char *filter_accept;
     char *filter_reject;
 } feed;
 
+typedef struct {
+
+} feed_with_articles;
+
 size_t my_write_callback(char *ptr, size_t size, size_t nmemb, xml *x);
 
 size_t get_xml(xml *x);