342 lines
10 KiB
C
342 lines
10 KiB
C
#include "../../include/articles_p/process_md.h"
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int process_md(article_info article, char **out)
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{
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*out = malloc(1);
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(*out)[0] = '\0';
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char *rest = strdup(article.content), *free_rest = rest;
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char *buff;
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int is_in_code = 0;
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int is_in_list = 0;
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while ((buff = strtok_r(rest, "\n", &rest)) != NULL)
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{
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if (strncmp(buff, "```", 3) == 0)
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{
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char *snippet;
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if (is_in_code)
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{
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snippet = "</pre></code>\n";
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is_in_code = 0;
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}
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else
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{
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snippet = "<pre><code>\n";
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is_in_code = 1;
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}
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char *tmp_out = realloc(*out, strlen(*out) + strlen(snippet) + 1);
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if (tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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strcat(*out, snippet);
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continue;
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}
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if (is_in_code)
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{
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char *tmp_out = realloc(*out, strlen(*out) + strlen(buff) + strlen("<br/>") + 1);
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if (tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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strcat(*out, buff);
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strcat(*out, "<br/>");
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continue;
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}
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if ((buff[0] == '*' && buff[1] == ' ') || (buff[0] == '-' && buff[1] == ' ') || (buff[0] == '+' && buff[1] == ' '))
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{
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char *begining = "";
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if (!is_in_list)
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{
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begining = "<ul>\n";
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is_in_list = 1;
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}
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memmove(buff, buff + 2, strlen(buff) - 1);
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size_t append_line_length = snprintf(NULL, 0, "%s<li>%s</li>\n", begining, buff) + 1;
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char *append = malloc(append_line_length);
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char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
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if (append == NULL || tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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snprintf(append, append_line_length, "%s<li>%s</li>\n", begining, buff);
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strcat(*out, append);
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free(append);
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continue;
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}
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if (is_in_list)
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{
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char *tmp_out = realloc(*out, strlen(*out) + strlen("</ul>\n") + 1);
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if (tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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strcat(*out, "</ul>\n");
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is_in_list = 0;
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}
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if (strcmp(buff, "***") == 0)
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{
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char *tmp_out = realloc(*out, strlen(*out) + strlen("<hr>\n") + 1);
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if (tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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strcat(*out, "<hr>\n");
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continue;
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}
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if (buff[0] == '#')
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{
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int n = 1;
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while (buff[n] == '#')
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n++;
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int k = (n > 6) ? 6 : n;
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memmove(buff, buff + n + 1, strlen(buff) - (n + 1) + 1); // n + 1 is to remove space after #
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size_t append_line_length = snprintf(NULL, 0, "<h%d>%s</h%d>\n", k, buff, k) + 1;
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char *append = malloc(append_line_length);
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char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
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if (append == NULL || tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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snprintf(append, append_line_length, "<h%d>%s</h%d>\n", k, buff, k);
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strcat(*out, append);
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free(append);
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continue;
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}
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if (buff[0] == '>')
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{
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memmove(buff, buff + 2, strlen(buff) - 1);
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size_t append_line_length = snprintf(NULL, 0, "<blockquote>%s</blockquote>\n", buff) + 1;
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char *append = malloc(append_line_length);
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char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
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if (append == NULL || tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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snprintf(append, append_line_length, "<blockquote>%s</blockquote>\n", buff);
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strcat(*out, append);
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free(append);
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continue;
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}
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char *tmp_out = realloc(*out, strlen(*out) + strlen("<p>") + 1);
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if (tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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strcat(*out, "<p>");
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for (int i = 0; i < strlen(buff); i++)
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{
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if (buff[i] == '*' && buff[i - 1] != '\\' && buff[i + 1] != ' ')
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{
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int n = 1;
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while (buff[i + n] == '*')
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n++;
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char *tag = "";
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if (n == 1)
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tag = "i";
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else if (n == 2)
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tag = "b";
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else if (n == 3)
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tag = "mark";
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int j = 0;
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while (buff[i + j + n] != '*' && buff[i + j + n - 1] != '\\')
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j++;
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char *internal = malloc(j + 1);
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memcpy(internal, buff + i + n, j);
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internal[j] = '\0';
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size_t append_line_length = snprintf(NULL, 0, "<%s>%s</%s>", tag, internal, tag) + 1;
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char *append = malloc(append_line_length);
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char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
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if (append == NULL || tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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snprintf(append, append_line_length, "<%s>%s</%s>", tag, internal, tag);
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strcat(*out, append);
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i += n * 2 + j - 1;
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free(append);
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free(internal);
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continue;
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}
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if (buff[i] == '!' && buff[i + 1] == '[')
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{
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int n = 0;
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while (buff[i + 2 + n] != ']')
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n++;
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if (buff[i + 2 + n + 1] != '(')
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continue;
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int k = 0;
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while (buff[i + 2 + n + 2 + k] != ')')
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k++;
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char *internal_text = malloc(n + 1);
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memcpy(internal_text, buff + i + 2, n);
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internal_text[n] = '\0';
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char *src = malloc(k + 1);
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memcpy(src, buff + i + 2 + n + 2, k);
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src[k] = '\0';
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size_t append_line_length = snprintf(NULL, 0, "<a href=\"%s\"><img src=\"%s\" alt=\"%s\"></a>", src, src, internal_text) + 1;
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char *append = malloc(append_line_length);
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char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
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if (append == NULL || tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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snprintf(append, append_line_length, "<a href=\"%s\"><img src=\"%s\" alt=\"%s\"></a>", src, src, internal_text);
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strcat(*out, append);
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i += 2 + n + 2 + k;
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free(append);
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free(src);
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free(internal_text);
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continue;
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}
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if (buff[i] == '[')
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{
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int n = 0;
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while (buff[i + 1 + n] != ']')
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n++;
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if (buff[i + 1 + n + 1] != '(')
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continue;
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int k = 0;
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while (buff[i + 1 + n + 2 + k] != ')')
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k++;
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char *internal_text = malloc(n + 1);
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memcpy(internal_text, buff + i + 1, n);
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internal_text[n] = '\0';
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char *href = malloc(k + 1);
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memcpy(href, buff + i + 1 + n + 2, k);
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href[k] = '\0';
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size_t append_line_length = snprintf(NULL, 0, "<a href=\"%s\">%s</a>", href, internal_text) + 1;
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char *append = malloc(append_line_length);
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char *tmp_out = realloc(*out, strlen(*out) + append_line_length);
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if (append == NULL || tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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snprintf(append, append_line_length, "<a href=\"%s\">%s</a>", href, internal_text);
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strcat(*out, append);
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i += 1 + n + 2 + k;
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free(append);
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free(href);
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free(internal_text);
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continue;
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}
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size_t len = strlen(*out);
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char *tmp_out = realloc(*out, len + 2);
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if (tmp_out == NULL)
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{
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perror("Couldn't allocate more memory to porcess Markdown");
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return -1;
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}
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*out = tmp_out;
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(*out)[len] = buff[i];
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(*out)[len + 1] = '\0';
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}
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tmp_out = realloc(*out, strlen(*out) + strlen("</p>") + 1);
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if (tmp_out == NULL)
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{
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perror("Couldn't allocate memory for new element");
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continue;
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}
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*out = tmp_out;
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strcat(*out, "</p>");
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size_t len = strlen(*out);
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if ((*out)[len - 1] != '\n')
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{
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char *tmp_out = realloc(*out, len + 2);
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if (tmp_out == NULL)
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{
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perror("Couldn't allocate more memory to porcess Markdown");
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return -1;
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}
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*out = tmp_out;
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(*out)[len] = '\n';
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(*out)[len + 1] = '\0';
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}
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}
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(*out)[strlen(*out) - 1] = '\0';
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free(free_rest);
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return strlen(*out);
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}
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