A small program that prints summoner profiles on opgg to stdout. Requires you to start it after you opened the league client. (currently assumes a Linux machine under Wine)

lol_lobby_profile.d

#!/usr/bin/env -S rdmd

import core.thread;
import std.algorithm.sorting;
import std.array : appender;
import std.datetime.systime;
import std.file;
import std.format;
import std.json;
import std.process;
import std.range.primitives;
import std.range;
import std.regex;
import std.stdio;
import std.uri;

string lol_region;
string lol_user;
string[] outbuf;

string
lol_lastlog(string dir)
{
        auto entry = dirEntries(dir, "*LeagueClientUx.log", SpanMode.shallow).array;
        entry.sort!("a.timeLastAccessed < b.timeLastAccessed");
        return entry.back.name;
}

string
lol_match_and_retrieve_json(char[] buf)
{
        size_t offset;
        size_t backset;
        while (buf.length - 1 > offset && buf[offset] != '{')
                offset++;
        if (offset == buf.length - 1)
                return "";
        backset = buf.length - 1;
        while (backset > 0 && buf[backset] != '}')
                backset--;
        if (backset == 0)
                return "";
        return buf[offset .. backset + 1].idup;
}

string
lol_display_name(string json)
{
        JSONValue j;

        try
                j = parseJSON(json);
        catch (JSONException e)
                return "";
        if ("displayName" in j)
                return j["displayName"].str;
        return "";
}

void
lol_pretty_print_with_url(string[4] names)
{
        string users = "users: %s, %s, %s, %s"
                .format(names[0], names[1], names[2], names[3]);
        string url = "https://porofessor.gg/pregame/%s/%s,%s,%s,%s"
                .format(lol_region,
                        encode(cast (const char[]) names[0]),
                        encode(cast (const char[]) names[1]),
                        encode(cast (const char[]) names[2]),
                        encode(cast (const char[]) names[3]));
        users.write;
        " ".write;
        url.writeln;
        url.browse;
}

int
main(string[] args)
{
        char[] buf;
        size_t cread;
        ulong offset;
        string json;
        string name;
        string path = environment["WINEPREFIX"]
                ~ "/drive_c/Riot Games/League of Legends/Logs/LeagueClient Logs";
        lol_region = environment.get("LOL_REGION", "euw");
        lol_user = environment.get("LOL_USER", "Muffindrake");
        string log = lol_lastlog(path);
        auto f = File(log);
        f.seek(0, SEEK_END);
        outbuf.reserve(4);
        auto name_outbuf = appender(&outbuf);
again:
        try {
                cread = f.readln(buf);
                if (cread == 0)
                        goto skip;
                json = buf.lol_match_and_retrieve_json;
                if (json == "")
                        goto skip;
                name = json.lol_display_name;
                if (name == "" || name == lol_user)
                        goto skip;
                name_outbuf.put(name);
                if (outbuf.length == 4) {
                        outbuf[0 .. 4].lol_pretty_print_with_url;
                        outbuf.length = 0;
                        name_outbuf = appender(&outbuf);
                }
        } catch (StdioException) {
        }
skip:
        if (f.eof) {
                offset = f.tell;
                f.reopen(log);
                f.seek(offset);
                Thread.sleep(dur!("seconds")(5));
        }
        goto again;
        return 0;
}