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/*
* File: prompt.cpp
* This program is used to generate a bash prompt with rainbow colors.
* It can also be used to generate the necessary environment variables
*
*/
#include <string>
#include <chrono>
#include <iostream>
#include <ctime>
#include <sys/ioctl.h>
#include <unistd.h>
#include <vector>
#include <exception>
#include <map>
#include <cmath>
#include <sys/sysinfo.h>
#include <filesystem>
#include "rainbow.hpp"
typedef std::string str;
int randint(int max) {
srand(std::chrono::duration_cast<std::chrono::nanoseconds>(
std::chrono::high_resolution_clock::now().time_since_epoch()).count());
return rand() % max;
}
#define setenv(a) std::cout << #a << "=\"" << a << "\"" << std::endl
#define exportenv(k,v) std::cout << "export " << k << "=\"" << v << "\"" << std::endl
str mouthlist = ")3>]DPO";
str eyelist = ";:=";
str emote(){
return eyelist.substr(randint(eyelist.length()-1),1) + mouthlist.substr(randint(mouthlist.length()-1),1);
}
str docmd(std::string inputted) {
FILE* file = popen(inputted.c_str(), "r");
char buff[1024];
int n = fread(buff, 1, sizeof(buff), file);
pclose(file);
str r = std::string(buff, n);
if (r.back() == '\n') r.pop_back();
return r;
}
str envorcmd(str env, str cmd) {
str ret = "";
try { ret = std::string(getenv(env.c_str())); }
catch (std::exception e) { ret = docmd(cmd); }
return ret;
}
int atoi(int &n, const char *c, int i=0){
n=0;
for (; c[i] >= '0' && c[i] <= '9'; i++) n = n*10 + (int)c[i] - (int)'0';
return i;
}
int intenv(const char* env) {
int n=0;
const char* val = getenv(env);
if (val == NULL) return n;
atoi(n, val);
return n;
}
str time_hh_mm() {
time_t t = time(0);
struct tm * now = localtime(&t);
char buffer[80];
int n = strftime(buffer, 80, "%H:%M", now);
return str(buffer, n);
}
typedef std::pair<str,str> paStr;
struct escape {
paStr PS = paStr("\\[\\e[","m\\]");
paStr XT = paStr("\033[","m");
str output = "";
bool debugON = false;
str wrap(str s) { if(debugON)return XT.first+s+XT.second; return PS.first + s + PS.second; }
str color(str color,bool background=false) {
if (color.length()==0) return "";
if (color.length() <= 3)color="5;"+color;
else color="2;"+color;
if (background) return "48;" + color;
return "38;" + color;
}
void add(str s, str fg="", str bg="", bool bold=false) {
if (bold==1) s = wrap("1") + s;
if (fg!="") s = wrap(color(fg)) + s;
if (bg!="") s = wrap(color(bg,true)) + s;
output += s + wrap("0");
}
struct rainbow r;
void rain(str s) {
for (int i = 0; i < s.length(); i++) {
add(s.substr(i,1), r.c.str());
r.next();
}
}
void set() { exportenv("PS1",output); }
};
int wave(int x) {return (int)(6+1.54*3.14159*(sin(x/(3.14159))));}
rainbow rain(int wavefactor=6) {
rainbow r;
const char* rainenv = getenv("RAINBOW");
if (rainenv == NULL)r.init(25-randint(15));
else {
atoi(r.s, rainenv, atoi(r.c.b, rainenv, atoi(r.c.g, rainenv,atoi(r.c.r, rainenv, 0)+1)+1)+1);
r.next();
}
exportenv("RAINBOW", r.c.str()+";"+std::to_string(r.s));
for(int i = 0; i < abs(wave(wavefactor)); i++)r.next();
return r;
}
str getpwd() {
str pwd;
try { pwd = std::string(getenv("PWD")); }
catch (std::exception e) { pwd = ""; }
if (pwd.back()=='\n')pwd.pop_back();
return pwd;
}
std::vector<str> split(str s, char delim) {
std::vector<str> ret;
str temp = "";
for (int i = 0; i < s.length(); i++) {
if (s[i] == delim) {
ret.push_back(temp);
temp = "";
} else temp += s[i];
}
ret.push_back(temp);
return ret;
}
int main(int argc,char** argv) {
escape PS1;
for (int i=1;i<argc;i++) {
str arg = argv[i];
if (arg == "--help" || arg == "help" || arg == "-h" || arg == "-?") {
std::cout << "PROMPT_COMMAND='eval \"$(" << argv[0] << ")\"'" << std::endl;
return 0;
}
if (arg == "view") {
PS1.debugON = true;
}
}
int lineno = intenv("LINENO");
if (lineno == 0)std::cout << "export LINENO COLUMNS LINES ";
PS1.r = rain(lineno);
std::vector<str> st;
st.push_back(envorcmd("USER","whoami"));
st.push_back(envorcmd("HOSTNAME","hostname"));
st.push_back(time_hh_mm());
int len = 0;
for (int i = 0; i < st.size(); i++)if (st[i].length()>len) len = st[i].length();
for (int i = 0; i < st.size(); i++){
while (st[i].length() < len) st[i] = " "+st[i];
st[i] = " " + st[i] + " ";
}
str ip = docmd("hostname -I | awk -F '.' ' { for(i=1;i<5;i++){printf(\"%.3d\", $i);}; } ' ");
PS1.add("\\$?", "190;180;30");
PS1.add(emote(), std::to_string(randint(214)+30));
PS1.add("|", "150;150;150");
str s = std::string(st[lineno%st.size()]);
int s_len = (s.length()/4);
if (s.length()%2==0) s_len++;
for (int i = 0; i<4; i++) PS1.add(s.substr(i*s_len,s_len),ip.substr(3*((i+lineno)%4),3));
PS1.add("| ","150;150;150");
PS1.rain(std::to_string(lineno));
PS1.add(" ");
str pwd = getpwd();
std::vector<str> dirs = split(pwd,'/');
if (dirs.size() == 0) dirs.push_back("");
if (dirs[0].length() == 0) dirs[0] = "/";
int i = dirs.size()-2;
if (i < 0) i = 0;
else PS1.add("..", "150;150;150");
for (; i < dirs.size(); i++) {
PS1.add("/", "150;150;150");
PS1.rain(dirs[i]);
}
PS1.add(" ");
PS1.rain("$");
PS1.add(" ");
PS1.set();
/*str pwd;
try { pwd = std::string(getenv("PWD")); }
catch (std::exception e) { pwd = ""; }
if (user.back()=='\n')user.pop_back();
output += " ";
output += pwd;*/
return 0;
}