Added function to wrap up article content with html template, process_md can detect headings, quotes, strips, highlinghts and lists

src/articles_op/article.c

@@ -30,13 +30,22 @@ char *trim(char *str)
     return str;
 }
 
+size_t get_file_size(FILE *file)
+{
+    fseek(file, 0L, SEEK_END);
+    size_t size = ftell(file);
+    fseek(file, 0L, SEEK_SET);
+
+    return size;
+}
+
 int list_articles(article_info **articles)
 {
     // FILE *file = fopen("./static/articles_list.db", "r");
-    FILE *file = fopen("./test.db", "r");
+    FILE *file = fopen("./test_.db", "r");
     if (file == NULL)
     {
-        perror("Couldn't open file");
+        perror("Couldn't open db file");
         return -1;
     }
 
@@ -101,7 +110,7 @@ long get_article_contents(article_info *article)
     }
 
     // snprintf(NULL, 0, "./static/articles/%s/%s.md", article->title, article->title);
-    int line_length = snprintf(NULL, 0, "./articles/%s/%s.md", article->title, article->title) + 1;
+    int line_length = snprintf(NULL, 0, "./test_articles/%s/%s.md", name, name) + 1;
     char *path = malloc(line_length);
     if (path == NULL)
     {
@@ -110,32 +119,254 @@ long get_article_contents(article_info *article)
     }
 
     // snprintf(path, line_length, "./static/articles/%s/%s.md", article->title, article->title);
-    snprintf(path, line_length, "./articles/%s/%s.md", article->title, article->title);
+    snprintf(path, line_length, "./test_articles/%s/%s.md", name, name);
 
     FILE *file = fopen(path, "r");
     if (file == NULL)
     {
-        perror("Couldn't open file");
+        perror("Couldn't open article file");
         article->content = "404";
         return -1;
     }
 
-    fseek(file, 0L, SEEK_END);
+    article->length = get_file_size(file);
-    article->length = ftell(file);
-    rewind(file);
 
     article->content = malloc(article->length + 1);
 
     for (int i = 0; i < article->length; i++)
-    {
         article->content[i] = fgetc(file);
-    }
 
     article->content[article->length] = '\0';
 
     return article->length;
 }
 
+int process_md(article_info article, char **out)
+{
+    *out = malloc(0);
+    char *tmp = strdup(article.content);
+    char *buff = strtok(tmp, "\n");
+
+    printf("%s\n", *out);
+
+    int is_in_list = 0;
+
+    while (buff != NULL)
+    {
+        if (strcmp(buff, "***") == 0)
+        {
+            char *tmp_out = realloc(*out, strlen(*out) + strlen("<hr>\n") + 1);
+            if (tmp_out == NULL)
+            {
+                perror("Couldn't allocate memory for new element");
+                continue;
+            }
+            *out = tmp_out;
+            strcat(*out, "<hr>\n");
+            continue;
+        }
+        if ((buff[0] == '*' && buff[1] == ' ') || (buff[0] == '-' && buff[1] == ' ') || (buff[0] == '+' && buff[1] == ' '))
+        {
+            char *begining = "";
+            if (!is_in_list)
+            {
+                char *begining = "<ul>\n";
+                is_in_list = 1;
+            }
+
+            memmove(buff, buff + 2, strlen(buff) - 1);
+
+            size_t append_line_length = snprintf(NULL, 0, "%s<li>%s</li>\n", begining, buff) + 1;
+            char *append = malloc(append_line_length);
+            char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
+            if (append == NULL || tmp_out == NULL)
+            {
+                perror("Couldn't allocate memory for new element");
+                continue;
+            }
+            *out = tmp_out;
+
+            snprintf(append, append_line_length, "%s<li>%s</li>\n", begining, buff);
+            strcat(*out, append);
+
+            free(append);
+        }
+        else
+        {
+            if (is_in_list)
+            {
+                char *tmp_out = realloc(*out, strlen(*out) + strlen("</ul>\n") + 1);
+                if (tmp_out == NULL)
+                {
+                    perror("Couldn't allocate memory for new element");
+                    continue;
+                }
+                *out = tmp_out;
+                strcat(*out, "</ul>\n");
+            }
+
+            if (buff[0] == '#')
+            {
+                int n = 1;
+                while (buff[n] == '#')
+                    n++;
+
+                memmove(buff, buff + n + 1, strlen(buff) - (n + 1) + 1); // n + 1 is to remove space after #
+
+                size_t append_line_length = snprintf(NULL, 0, "<h%d>%s</h%d>\n", n, buff, n) + 1;
+                char *append = malloc(append_line_length);
+                char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
+                if (append == NULL || tmp_out == NULL)
+                {
+                    perror("Couldn't allocate memory for new element");
+                    continue;
+                }
+                *out = tmp_out;
+
+                snprintf(append, append_line_length, "<h%d>%s</h%d>\n", n, buff, n);
+                strcat(*out, append);
+
+                free(append);
+            }
+            else if (buff[0] == '>')
+            {
+                memmove(buff, buff + 2, strlen(buff) - 1);
+
+                size_t append_line_length = snprintf(NULL, 0, "<blockquote>%s</blockquote>\n", buff) + 1;
+                char *append = malloc(append_line_length);
+                char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
+                if (append == NULL || tmp_out == NULL)
+                {
+                    perror("Couldn't allocate memory for new element");
+                    continue;
+                }
+                *out = tmp_out;
+
+                snprintf(append, append_line_length, "<blockquote>%s</blockquote>\n", buff);
+                strcat(*out, append);
+
+                free(append);
+            }
+            else
+            {
+                for (int i = 0; i < strlen(buff); i++)
+                {
+                    if (buff[i] == '*' && buff[i - 1] != '\\' && buff[i + 1] != ' ')
+                    {
+                        int n = 1;
+                        while (buff[n] == '*')
+                            n++;
+
+                        char *tag = "";
+                        if (n == 1)
+                            tag = "i";
+                        else if (n == 2)
+                            tag = "b";
+                        else if (n == 2)
+                            tag = "mark";
+
+                        int j = 0;
+                        while (buff[i + j + n] != '*' && buff[i + j + n - 1] != '\\')
+                            j++;
+
+                        char *internal = malloc(j + 1);
+                        memcpy(internal, buff + i + n, j);
+                        internal[j] = '\0';
+
+                        size_t append_line_length = snprintf(NULL, 0, "<%s>%s</%s>", tag, internal, tag) + 1;
+                        char *append = malloc(append_line_length);
+                        char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
+                        if (append == NULL || tmp_out == NULL)
+                        {
+                            perror("Couldn't allocate memory for new element");
+                            continue;
+                        }
+                        *out = tmp_out;
+
+                        snprintf(append, append_line_length, "<%s>%s</%s>", tag, internal, tag);
+                        strcat(*out, append);
+
+                        i += n * 2 + j;
+
+                        free(append);
+                        free(internal);
+                    }
+                    else
+                    {
+                        size_t len = strlen(*out);
+                        char *tmp_out = realloc(*out, len + 2);
+                        if (tmp_out == NULL)
+                        {
+                            perror("Couldn't allocate more memory to porcess Markdown");
+                            return -1;
+                        }
+                        *out = tmp_out;
+                        (*out)[len] = buff[i];
+                        (*out)[len + 1] = '\0';
+                    }
+                }
+            }
+        }
+
+        size_t len = strlen(*out);
+        if ((*out)[len - 1] != '\n')
+        {
+            char *tmp_out = realloc(*out, len + 2);
+            if (tmp_out == NULL)
+            {
+                perror("Couldn't allocate more memory to porcess Markdown");
+                return -1;
+            }
+            *out = tmp_out;
+            (*out)[len] = '\n';
+            (*out)[len + 1] = '\0';
+        }
+
+        buff = strtok(NULL, "\n");
+    }
+
+    // printf("--%s--\n", *out);
+    return strlen(*out);
+}
+
+int gen_html_article(article_info article, char **out)
+{
+    // FILE *template = fopen("./static/article.html", "r");
+    FILE *template = fopen("./test_article.html", "r");
+    if (template == NULL)
+    {
+        perror("Couldn't open article template");
+        *out = "500";
+        return -1;
+    }
+
+    size_t template_size = get_file_size(template);
+
+    char *template_str = malloc(template_size + 1);
+
+    for (int i = 0; i < template_size; i++)
+        template_str[i] = fgetc(template);
+    template_str[template_size] = '\0';
+
+    *out = malloc(template_size + article.length + 1);
+
+    char *content;
+
+    process_md(article, &content);
+
+    int line_length = snprintf(NULL, 0, template_str, article.title, content) + 1;
+    *out = malloc(line_length);
+    if (*out == NULL)
+    {
+        *out = "500";
+        return -1;
+    }
+
+    snprintf(*out, line_length, template_str, article.title, content);
+
+    return line_length;
+}
+
 /* Only for testing purposes */
 int main()
 {
@@ -146,7 +377,14 @@ int main()
     printf("Read %d lines\n", n);
     printf("Last article's creation date is %ld and title is %s\n", articles[n - 1].time, articles[n - 1].title);
 
-    get_article_contents(&(articles[0]));
+    for (int i = 0; i < n; i++)
+        get_article_contents(&(articles[i]));
+
+    printf("Got content of %d files\n", n);
+
+    char **html = malloc(sizeof(char *) * n);
+    for (int i = 0; i < n; i++)
+        gen_html_article(articles[i], &(html[i]));
 
     return 0;
 }

static/article.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>%s</title>
+    <link rel="stylesheet" href="style.css">
+</head>
+<body>
+    %s
+</body>
+</html>