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#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sds/sds.h>
#include <regex.h>
#include <util.h>
struct md_syntax {
regex_t anchor;
};
struct md_syntax syntax = {
.anchor = NULL,
};
int* anchorsIndecies;
int anchorsCount = 0;
void initRendering() {
/*
* Compile regexes used in rendering
*/
herr(regcomp(&syntax.anchor, "\\[\\([^]]*\\)\\](\\([^)]*\\))", 0), "regcomp");
}
void freeRendering() {
regfree(&syntax.anchor);
free(anchorsIndecies);
}
void renderPage(const sds page) {
if (sdslen(page) == 0) {
printf("Server didn't return page!\n");
return;
}
sds toPrint = sdsdup(page);
/*
* Parse Markdown constructs
*/
/* Substitute and store anchorsIndecies */
if (anchorsIndecies != NULL) {
free(anchorsIndecies);
anchorsCount = 0;
anchorsIndecies = NULL;
}
toPrint = gsub_getm(toPrint, &syntax.anchor, "\16\033[4m\1\033[0m", &anchorsIndecies, &anchorsCount);
sds newPrint;
for (int i = 0, anchorInd = 0; i < anchorsCount; i++) {
anchorInd = strchr(toPrint, '\16') - toPrint;
/* In toPrint, replace '\16' with "\033[30;46m%d\033[0m", where %d is the variable i */
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;
}
/*
* Print page on stdout
*/
write(1, toPrint, sdslen(toPrint));
sdsfree(toPrint);
}
#define MAX_LEN_COMMAND 16
#define COMMAND_FORMAT ": %16s"
int portLen(char* start) {
int count = 0;
while ('0' <= *start && *start <= '9') {
count++;
start++;
}
return count;
}
int hostLen(char* start) {
int count = 0;
while (*start == '.' || ('0' <= *start && *start <= '9')) {
count++;
start++;
}
return count;
}
char* findBeginningOfPath(char* uri) {
char* startPath = strchr(uri, '/');
while (startPath != uri && startPath != NULL) {
if (*(startPath - 1) == '.') startPath--;
else break;
}
return startPath;
}
int handleCLI(sds *host, sds *port, sds *uri, const sds page) {
// Get a line
char line[1024];
fgets(line, 1024, stdin);
// Nothing
if (line[0] == '\0') {
printf("Please enter a valid command!\n");
return 0;
}
// Number or URL
if (line[0] != ':') {
sds newURI;
// Index of anchor
if (isNumber(line)) {
int gotoIndex = 0;
sscanf(line, "%d", &gotoIndex);
if (gotoIndex < 0 || gotoIndex >= anchorsCount) {
printf("Invalid anchor index!\n");
return 0;
}
char* start = strchr(page + anchorsIndecies[gotoIndex], '(') + 1;
newURI = sdsnewlen(start, strchr(start, ')') - start);
}
// New address
else {
newURI = sdsnewlen(line, strlen(line)-1); // skip newline
}
char* startPath = findBeginningOfPath(newURI);
// Handle relative URLs
if (startPath == newURI) {
sds beforePath = sdscatsds(sdsnewlen(*uri, findBeginningOfPath(*uri) - *uri), newURI);
sdsfree(newURI);
newURI = beforePath;
startPath = findBeginningOfPath(newURI);
}
if (*uri != NULL) sdsfree(*uri);
*uri = newURI;
char* startHost = strchr(newURI, '@');
char* startPort = strchr(newURI, ':');
// Update host
if (startHost != NULL && startHost < startPath) {
if (host != NULL) sdsfree(*host);
*host = sdsnewlen(startHost + 1, hostLen(startHost + 1));
}
// Update port
if (startPort != NULL && startPort < startPath) {
if (port != NULL) sdsfree(*port);
*port = sdsnewlen(startPort + 1, portLen(startPort + 1));
}
return 0;
}
// Special command
// Get command name and it's arguments
// Currently no command takes arguments
char name[MAX_LEN_COMMAND+1] = { '\0' };
int argsAssigned = sscanf(line, COMMAND_FORMAT, name);
if (streq(name, "q") || streq(name, "e") || streq(name, "quit") || streq(name, "exit")) {
return 1;
}
printf("Invalid command %s!\n", name);
return 0;
}
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