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// C ref: mail.c — ckmailstatus(), newmail(), readmail()
//
// Selects a random missive from the encrypted corpus, expands templates
// with player info and random choices, and delivers as a scroll of mail.
import { game } from './gstate.js';
import { silent_rn2, rn2 } from './rng.js';
import { MISSIVES_CORPUS } from './missives_data.js';
import { vfsWriteFile, vfsReadFile } from './storage.js';
import { pline, verbalize } from './pline.js';
import { mksobj } from './mkobj.js';
import { SCR_MAIL } from './objects.js';
import { PM_MAIL_DAEMON } from './monsters.js';
import { mons } from './monsters.js';
import { makemon } from './makemon.js';
import { oname } from './do_name.js';
import { hold_another_object } from './invent.js';
import { mongone, m_next2u } from './mon.js';
import { place_monster, remove_monster } from './steed.js';
import { newsym, flush_screen, delay_output } from './display.js';
import { m_at } from './map_access.js';
import { accessible } from './monmove.js';
import { enexto } from './makemon.js';
import { dist2 } from './hacklib.js';
import { isok, NO_MM_FLAGS, ONAME_NO_FLAGS } from './const.js';
const SEPARATOR = '===';
// --- Corpus parsing ---
// Parse the corpus into an array of { id, from, subject, body, start, end }
// where start/end are character offsets into the corpus string.
let _parsedMissives = null;
function parseMissives() {
if (_parsedMissives) return _parsedMissives;
const corpus = MISSIVES_CORPUS;
const entries = [];
const parts = corpus.split('\n' + SEPARATOR + '\n');
let offset = 0;
for (const part of parts) {
const trimmed = part.replace(/^===\n/, ''); // first entry may start with ===
if (!trimmed.trim()) { offset += part.length + 4; continue; }
const lines = trimmed.split('\n');
let id = '', from = '', subject = '', bodyStart = 0;
for (let i = 0; i < lines.length; i++) {
if (lines[i].startsWith('Id: ')) id = lines[i].slice(4).trim();
else if (lines[i].startsWith('From: ')) from = lines[i].slice(6).trim();
else if (lines[i].startsWith('Subject: ')) subject = lines[i].slice(9).trim();
else if (lines[i].trim() === '' && id) { bodyStart = i + 1; break; }
}
const body = lines.slice(bodyStart).join('\n').trim();
entries.push({
id, from, subject, body,
start: offset,
end: offset + part.length,
});
offset += part.length + 4; // +4 for \n===\n
}
_parsedMissives = entries;
return entries;
}
// Select a missive by random byte offset — longer missives are more likely.
// Skips missives the player has already received (by id).
function selectMissive(receivedIds) {
const corpus = MISSIVES_CORPUS;
const entries = parseMissives();
if (entries.length === 0) return null;
// Try up to 20 times to find an unseen missive
for (let attempt = 0; attempt < 20; attempt++) {
const byteOffset = rn2(corpus.length);
// Find which entry contains this offset
let selected = null;
for (const entry of entries) {
if (byteOffset >= entry.start && byteOffset < entry.end) {
selected = entry;
break;
}
}
if (!selected) continue;
if (receivedIds.has(selected.id)) continue;
return selected;
}
// Fallback: pick any unseen missive uniformly
const unseen = entries.filter(e => !receivedIds.has(e.id));
if (unseen.length === 0) return null;
return unseen[rn2(unseen.length)];
}
// --- Template expansion ---
// NetHack shopkeeper names (subset)
const SHOPKEEPER_NAMES = [
'Asidonhopo', 'Akstransen', 'Djordansen', 'Izchak',
'Ansen', 'Dansen', 'Ansen', 'Havansen',
'Ansen', 'Bansen', 'Ansen', 'Cansen',
'Xixor', 'Transen', 'Ansen', 'Flansen',
'Sansen', 'Kansen', 'Wansen', 'Lansen',
'Gansen', 'Nansen', 'Mansen', 'Pansen',
];
function getPlayerInfo() {
const g = game;
const u = g?.u;
const flags = g?.flags;
// Role/race/alignment/gender names
const roles = ['Archeologist','Barbarian','Caveman','Healer','Knight',
'Monk','Priest','Ranger','Rogue','Samurai','Tourist','Valkyrie','Wizard'];
const races = ['human','elf','dwarf','gnome','orc'];
const aligns = ['chaotic','neutral','lawful'];
const genders = ['male','female'];
const roleIdx = flags?.initrole ?? -1;
const raceIdx = flags?.initrace ?? -1;
const alignIdx = flags?.initalign ?? -1;
const gendIdx = flags?.initgend ?? -1;
const roleName = (roleIdx >= 0 && roleIdx < roles.length) ? roles[roleIdx] : 'Adventurer';
const raceName = (raceIdx >= 0 && raceIdx < races.length) ? races[raceIdx] : 'human';
const alignName = (alignIdx >= 0 && alignIdx < 3) ? aligns[alignIdx] : 'neutral';
const gendName = (gendIdx >= 0 && gendIdx < 2) ? genders[gendIdx] : 'male';
// God name from the game's deity list
const godName = g?.align?.god || 'your god';
const playerName = g?.plname || u?.name || 'Adventurer';
return {
name: playerName,
role: roleName.toLowerCase(),
Role: roleName,
race: raceName.toLowerCase(),
Race: raceName.charAt(0).toUpperCase() + raceName.slice(1),
align: alignName,
Align: alignName.charAt(0).toUpperCase() + alignName.slice(1),
gender: gendName,
god: godName.toLowerCase(),
God: godName.charAt(0).toUpperCase() + godName.slice(1).toLowerCase(),
he: gendIdx === 1 ? 'she' : 'he',
He: gendIdx === 1 ? 'She' : 'He',
him: gendIdx === 1 ? 'her' : 'him',
his: gendIdx === 1 ? 'her' : 'his',
};
}
function anPrefix(word) {
return /^[aeiou]/i.test(word) ? 'an' : 'a';
}
// Expand all template syntax in a string.
// Handles: {name}, {role}, {Role}, {an:role}, {An:role}, {rand:N-M},
// {shopkeeper}, [a|b|c], [:if:role:text], [:if:role:yes|no],
// [:if:role1/role2:text]
function expandTemplate(text, info) {
// First expand [...] brackets (may be nested)
text = expandBrackets(text, info);
// Then expand {var} substitutions
text = expandVars(text, info);
return text;
}
function expandBrackets(text, info) {
// Process innermost brackets first, working outward
let prev;
let iterations = 0;
do {
prev = text;
text = text.replace(/\[([^\[\]]*)\]/g, (match, content) => {
return resolveBracket(content, info);
});
iterations++;
} while (text !== prev && iterations < 50);
return text;
}
function resolveBracket(content, info) {
// Conditional: [:if:condition:thenText] or [:if:condition:thenText|elseText]
const ifMatch = content.match(/^:if:([^:]+):([\s\S]*)$/);
if (ifMatch) {
const conditions = ifMatch[1].split('/');
const rest = ifMatch[2];
// Split on | for then/else — but only the LAST | is the else separator
// (earlier | are part of nested picks that should already be resolved)
const lastPipe = rest.lastIndexOf('|');
const matches = conditions.some(c => testCondition(c.trim(), info));
if (lastPipe === -1) {
// No else clause
return matches ? rest : '';
}
const thenText = rest.slice(0, lastPipe);
const elseText = rest.slice(lastPipe + 1);
return matches ? thenText : elseText;
}
// Random pick: split on |, choose one
const options = content.split('|');
if (options.length === 1) return content;
return options[rn2(options.length)];
}
function testCondition(cond, info) {
// Role check
if (info.role.toLowerCase() === cond.toLowerCase()) return true;
if (info.Role.toLowerCase() === cond.toLowerCase()) return true;
// Race check
if (info.race.toLowerCase() === cond.toLowerCase()) return true;
// Alignment check
if (info.align.toLowerCase() === cond.toLowerCase()) return true;
// Gender check
if (info.gender.toLowerCase() === cond.toLowerCase()) return true;
return false;
}
function expandVars(text, info) {
return text.replace(/\{([^}]+)\}/g, (match, key) => {
// {an:role}, {An:role}, {an:race}, {An:race}
const anMatch = key.match(/^(an|An):(\w+)$/);
if (anMatch) {
const capitalize = anMatch[1] === 'An';
const varName = anMatch[2];
const val = info[varName] || info[varName.toLowerCase()] || varName;
const prefix = anPrefix(val);
const result = prefix + ' ' + val;
return capitalize ? result.charAt(0).toUpperCase() + result.slice(1) : result;
}
// {rand:N-M}
const randMatch = key.match(/^rand:(\d+)-(\d+)$/);
if (randMatch) {
const lo = parseInt(randMatch[1]);
const hi = parseInt(randMatch[2]);
if (hi <= lo) return String(lo);
return String(lo + rn2(hi - lo + 1));
}
// {shopkeeper}
if (key === 'shopkeeper') {
return SHOPKEEPER_NAMES[rn2(SHOPKEEPER_NAMES.length)];
}
// Direct variable lookup
if (key in info) return info[key];
return match; // leave unrecognized vars as-is
});
}
// --- Text rewrapping ---
// Rewrap expanded text to fit ~75 columns.
// Preserves lines starting with spaces (lists, headers, ASCII art).
// Preserves blank lines as paragraph breaks.
function rewrap(text, cols = 75) {
const lines = text.split('\n');
const result = [];
let para = [];
let paraIndent = ''; // prefix for first line
let paraHangIndent = ''; // prefix for continuation lines
function flushPara() {
if (para.length === 0) return;
const joined = para.join(' ').replace(/\s+/g, ' ').trim();
const firstPrefix = paraIndent;
const contPrefix = paraHangIndent || paraIndent;
const words = joined.split(' ');
let line = '';
let isFirst = true;
for (const word of words) {
const prefix = isFirst ? firstPrefix : contPrefix;
if (line.length === 0) {
line = word;
} else if (prefix.length + line.length + 1 + word.length <= cols) {
line += ' ' + word;
} else {
result.push((isFirst ? firstPrefix : contPrefix) + line);
isFirst = false;
line = word;
}
}
if (line) result.push((isFirst ? firstPrefix : contPrefix) + line);
para = [];
paraIndent = '';
paraHangIndent = '';
}
for (const line of lines) {
if (line.trim() === '') {
// Blank line = paragraph break
flushPara();
result.push('');
} else if (/^\s+[-*]\s/.test(line)) {
// Bulleted list item — starts a new indented paragraph
// Hanging indent aligns to the text after the bullet
flushPara();
const m = line.match(/^(\s+[-*]\s+)/);
paraIndent = line.match(/^(\s+)/)[1];
paraHangIndent = ' '.repeat(m[1].length);
para.push(line.slice(paraIndent.length));
} else if (/^\s/.test(line)) {
// Indented continuation — join to current indented paragraph
const indent = line.match(/^(\s+)/)[1];
if (para.length > 0 && paraIndent) {
// Continue the current indented/bullet paragraph
para.push(line.trim());
} else {
// Start a new indented paragraph
if (paraIndent !== indent) flushPara();
paraIndent = indent;
para.push(line.trim());
}
} else {
// Normal text — accumulate into paragraph for rewrapping
if (paraIndent) flushPara();
para.push(line);
}
}
flushPara();
// Collapse multiple consecutive blank lines into one
const collapsed = [];
for (let i = 0; i < result.length; i++) {
if (result[i] === '' && i > 0 && collapsed[collapsed.length - 1] === '') continue;
collapsed.push(result[i]);
}
// Trim trailing blank lines
while (collapsed.length > 0 && collapsed[collapsed.length - 1] === '') collapsed.pop();
return collapsed.join('\n');
}
// --- Mail daemon state ---
function getMailState() {
if (!game._mailState) {
game._mailState = {
receivedIds: new Set(),
hasReceivedAny: false,
};
}
return game._mailState;
}
// --- Public API ---
// Check whether to deliver mail this turn.
// Called from moveloop_core at the same point C calls ckmailstatus().
// Uses silent_rn2 (peek) for the probability check — does not
// perturb the RNG stream. Only draws from RNG if delivery triggers.
export async function ckmailstatus() {
const g = game;
if (!g || !g.u) return;
// C ref: mail.c — skip if swallowed or mail disabled
if (g.u.uswallow) return;
if (g.flags && g.flags.biff === false) return;
// Only deliver beyond dungeon level 1
if (!g.u.uz || (g.u.uz.dnum === 0 && g.u.uz.dlevel <= 1)) return;
// Not during multi-turn actions
if (g.multi) return;
const state = getMailState();
// Cap at 10 deliveries per game
if (state.receivedIds.size >= 10) return;
const prob = state.hasReceivedAny ? 8000 : 2000;
if (silent_rn2(prob) !== 80) return;
// Delivery triggered! Now we draw on RNG freely.
// Return the promise so the caller can await if needed.
return await deliverMail();
}
// C ref: mail.c:236 — find starting position for mail daemon
function md_start(startp) {
const g = game;
// Try to find a position at the edge of the map near the hero
for (let trycount = 0; trycount < 20; trycount++) {
const x = rn2(g.level?.cols || 80);
const y = rn2(g.level?.rows || 21);
if (isok(x, y) && accessible(x, y) && !m_at(x, y)) {
startp.x = x; startp.y = y;
return true;
}
}
return false;
}
// C ref: mail.c:247 — find stopping position adjacent to hero
function md_stop(stopp, startp) {
const g = game;
const u = g.u;
let min_distance = -1;
for (let x = u.ux - 1; x <= u.ux + 1; x++) {
for (let y = u.uy - 1; y <= u.uy + 1; y++) {
if (!isok(x, y) || (x === u.ux && y === u.uy)) continue;
if (accessible(x, y) && !m_at(x, y)) {
const distance = dist2(x, y, startp.x, startp.y);
if (min_distance < 0 || distance < min_distance
|| (distance === min_distance && rn2(2))) {
stopp.x = x; stopp.y = y;
min_distance = distance;
}
}
}
}
if (min_distance < 0) {
const cc = { x: 0, y: 0 };
if (!enexto(cc, u.ux, u.uy, mons[PM_MAIL_DAEMON])) return false;
stopp.x = cc.x; stopp.y = cc.y;
}
return true;
}
// C ref: mail.c:277
const mail_text = ['Gangway!', 'Look out!', 'Pardon me!'];
async function deliverMail() {
const state = getMailState();
const info = getPlayerInfo();
const missive = selectMissive(state.receivedIds);
if (!missive) return;
state.receivedIds.add(missive.id);
state.hasReceivedAny = true;
// Expand templates
const expandedSubject = rewrap(expandTemplate(missive.subject, info), 75);
const expandedFrom = expandTemplate(missive.from, info);
const expandedBody = rewrap(expandTemplate(missive.body, info), 75);
const fullEmail = `From: ${expandedFrom}\nSubject: ${expandedSubject}\n\n${expandedBody}`;
const senderMatch = expandedFrom.match(/^"?([^"<]+)/);
const senderName = senderMatch ? senderMatch[1].trim() : 'someone';
// Store for scroll reading
game._pendingMail = {
id: missive.id,
from: expandedFrom,
senderName,
subject: expandedSubject,
body: expandedBody,
fullText: fullEmail,
};
// Append to shell VFS mailbox
appendToVfsMailbox(fullEmail);
// C ref: mail.c:399-450 — newmail()
// Try to spawn and animate the mail daemon
const start = { x: 0, y: 0 };
const stop = { x: 0, y: 0 };
if (!md_start(start) || !md_stop(stop, start)) {
// Can't find a path — just pline the delivery
await pline(`You have some mail from ${senderName}.`);
return;
}
// Make the daemon
const md = await makemon(mons[PM_MAIL_DAEMON], start.x, start.y, NO_MM_FLAGS);
if (!md) {
await pline(`You have some mail from ${senderName}.`);
return;
}
// Move daemon to stop position (simplified — just teleport, no rush animation)
remove_monster(md.mx, md.my);
place_monster(md, stop.x, stop.y);
newsym(stop.x, stop.y);
await flush_screen(0);
await delay_output();
// C ref: mail.c:417 — "Hello, player! I have some mail for you."
await verbalize(`${mail_text[rn2(3)]} ${game.plname}! I have some mail for you.`);
// Create scroll of mail
const obj = mksobj(SCR_MAIL, false, false);
// Name the scroll with the sender
oname(obj, `mail from ${senderName}`, ONAME_NO_FLAGS);
// Deliver the scroll
if (!m_next2u(md)) {
await verbalize('Catch!');
}
await hold_another_object(obj, 'Oops!', null, null);
// Daemon leaves — remove it
remove_monster(md.mx, md.my);
newsym(md.mx, md.my);
mongone(md);
}
const VFS_MAILBOX = 'home/Mail/inbox';
function appendToVfsMailbox(emailText) {
const existing = vfsReadFile(VFS_MAILBOX) || '';
const now = new Date();
const dateStr = now.toLocaleString('en-US', {
weekday: 'short', month: 'short', day: 'numeric',
hour: '2-digit', minute: '2-digit', hour12: false,
});
const dated = `Date: ${dateStr}\n${emailText}`;
const separator = existing ? '\n\n---\n\n' : '';
vfsWriteFile(VFS_MAILBOX, existing + separator + dated);
}
// Read the pending mail (called when player reads scroll of mail).
export function readMail() {
const mail = game._pendingMail;
if (!mail) return null;
game._pendingMail = null;
return mail;
}
// --- Shell mailbox API ---
// Get parsed messages from the VFS mailbox.
export function getMailboxMessages() {
const content = vfsReadFile(VFS_MAILBOX);
if (!content || !content.trim()) return [];
return content.split(/\n---\n/).map(m => m.trim()).filter(Boolean).map(raw => {
const lines = raw.split('\n');
let from = '', subject = '', date = '';
let bodyStart = 0;
for (let i = 0; i < lines.length; i++) {
if (lines[i].startsWith('From: ')) from = lines[i].slice(6).replace(/<[^>]+>/, '').trim();
else if (lines[i].startsWith('Subject: ')) subject = lines[i].slice(9).trim();
else if (lines[i].startsWith('Date: ')) date = lines[i].slice(6).trim();
else if (lines[i].trim() === '') { bodyStart = i + 1; break; }
}
return { from, subject, date, body: lines.slice(bodyStart).join('\n'), raw };
});
}
// Seed the shell mailbox with a few pre-existing messages on first access.
// Called by the shell `mail` command (or at shell login) to populate the
// inbox with messages that appear to have arrived before the player started.
// Uses a simple PRNG seeded from the current time so different sessions
// get different seed mails, but the same session is consistent.
const VFS_MAIL_SEEDED = 'home/Mail/.seeded';
export function seedMailboxIfNeeded() {
if (vfsReadFile(VFS_MAIL_SEEDED)) return; // already seeded
const entries = parseMissives();
if (entries.length === 0) return;
// Pick 2-4 seed messages — use wall clock as simple seed
const now = Date.now();
const count = 2 + (now % 3); // 2, 3, or 4
const seenIds = new Set();
const fakeInfo = {
name: 'Adventurer', role: 'adventurer', Role: 'Adventurer',
race: 'human', Race: 'Human', align: 'neutral', Align: 'Neutral',
gender: 'male', god: 'your god', God: 'Your God',
he: 'they', He: 'They', him: 'them', his: 'their',
};
// Pick from the "safe" emails — ones that don't depend heavily on
// game state (avoid quest leader, bones ghost, god review, etc.)
const safeIds = new Set([
'izchak-lighting', 'oracle-consultation', 'gue-gazette',
'gygax-memorial', 'crowther-woods', 'jay-fenlason',
'toy-wichman-postcard', 'devteam-autoreply', 'brian-kernighan',
'ken-arnold', 'richard-stallman', 'elbereth-ad',
'shopkeeper-guild-newsletter', 'quantum-mechanic',
'astral-temple-fundraising', 'twoflower-tour',
]);
const safeEntries = entries.filter(e => safeIds.has(e.id));
if (safeEntries.length === 0) return;
// Simple deterministic shuffle based on timestamp
const shuffled = [...safeEntries];
for (let i = shuffled.length - 1; i > 0; i--) {
const j = ((now >> (i % 16)) + i * 7) % (i + 1);
[shuffled[i], shuffled[j]] = [shuffled[j], shuffled[i]];
}
// Generate fake past dates (1-14 days ago)
for (let i = 0; i < Math.min(count, shuffled.length); i++) {
const missive = shuffled[i];
const expandedSubject = rewrap(expandTemplate(missive.subject, fakeInfo), 75);
const expandedFrom = expandTemplate(missive.from, fakeInfo);
const expandedBody = rewrap(expandTemplate(missive.body, fakeInfo), 75);
const fullEmail = `From: ${expandedFrom}\nSubject: ${expandedSubject}\n\n${expandedBody}`;
const pastDate = new Date(now - (i + 1) * 86400000 * (1 + (now % 3)));
const dateStr = pastDate.toLocaleString('en-US', {
weekday: 'short', month: 'short', day: 'numeric',
hour: '2-digit', minute: '2-digit', hour12: false,
});
const dated = `Date: ${dateStr}\n${fullEmail}`;
const existing = vfsReadFile(VFS_MAILBOX) || '';
const separator = existing ? '\n\n---\n\n' : '';
vfsWriteFile(VFS_MAILBOX, existing + separator + dated);
}
vfsWriteFile(VFS_MAIL_SEEDED, '1');
}
export function init_mail_globals() {
if (game) {
game._mailState = null;
game._pendingMail = null;
}
}
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