1 files changed, 183 insertions, 0 deletions
diff --git a/src/browser-cli.c b/src/browser-cli.c
new file mode 100644
index 0000000..3bea4ba
--- /dev/null
+++ b/src/browser-cli.c
@@ -0,0 +1,183 @@
+#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;
+}