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/* Receives a markdown file and "renders" it
*/
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sds/sds.h>
#include <regex.h>
#include <util.h>
int create_socket(const char* ip, const char* port) {
/*
* Create socket for connecting with server
*/
int fd_socket;
herr(fd_socket = socket(AF_INET, SOCK_STREAM, 0), "socket");
struct sockaddr_in sa_server = {
.sin_family = AF_INET,
.sin_port = inet_atop(port),
};
herr(inet_aton(ip, &sa_server.sin_addr.s_addr), "inet_aton");
herr(connect(fd_socket, (struct sockaddr*)&sa_server, sizeof(struct sockaddr_in)), "connect");
return fd_socket;
}
sds get_page(const int fd_socket, const char* URL) {
write(fd_socket, URL, strlen(URL));
sds page = sdsempty();
char buff[512];
memset(buff, 0, 512);
while (read(fd_socket, buff, 512)) {
page = sdscat(page, buff);
memset(buff, 0, 512);
}
return page;
}
struct md_syntax {
regex_t anchor;
};
void renderPage(const sds page, const struct md_syntax* syntax, int* *matches, int *matchesCount) {
sds toPrint = sdsdup(page);
/* Substitute and register anchors */
toPrint = gsub_getm(toPrint, &syntax->anchor, "\033[4m\1\033[0m\16", matches, matchesCount);
int anchorInd = 0;
sds newPrint;
for (int i = 0; i < *matchesCount; i++) {
anchorInd = strchr(toPrint, '\16') - toPrint;
toPrint[anchorInd] = '\0';
newPrint = sdsgrowzero(sdsempty(), sdslen(toPrint) + digits(i) + 8 + 4);
sprintf(newPrint, "%s\033[30;46m%d\033[0m%s", toPrint, i, toPrint + anchorInd + 1);
sdsfree(toPrint);
toPrint = newPrint;
}
write(1, toPrint, sdslen(toPrint));
sdsfree(toPrint);
}
int main(int argc, char* argv[]) {
/*
* Preparation for rendering
*/
struct md_syntax md = {
.anchor = NULL,
};
herr(regcomp(&md.anchor, "\\[\\([^]]*\\)\\](\\([^)]*\\))", 0), "regcomp");
/*
* Server-client communication
*/
sds address = sdsnew(argv[1]);
int count = 0;
sds page;
int* anchorIndecies = NULL;
int anchorCount = 0;
int gotoIndex = 0;
int fd_socket;
while (count < 2) {
fd_socket = create_socket("127.0.0.1", "8080");
page = get_page(fd_socket, address);
free(anchorIndecies);
anchorCount = 0;
renderPage(page, &md, &anchorIndecies, &anchorCount);
scanf("%d", &gotoIndex);
sdsfree(address);
char* newplace = strchr(page + anchorIndecies[gotoIndex], '(') + 1;
address = sdscatlen(sdsnew(argv[1]), newplace, strchr(newplace, ')') - newplace);
count++;
close(fd_socket);
}
sdsfree(page);
sdsfree(address);
free(anchorIndecies);
regfree(&md.anchor);
}
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