Initial commit — Rosary Presenter App

Full source for loveandrosary.com: slide-based Rosary/novena/Divine Mercy
Chaplet presentation tool with multi-user roles, SVG bead ring, audio uploads,
donate strip, and public session profiles.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
2026-05-13 18:44:08 -07:00
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/**
* assets/js/presenter.js (v11)
*
* Controls slide navigation and DOM updates for the presentation view.
* Depends on:
* - SLIDES (global, JSON array from PHP)
* - SESSION_ID (global, integer session ID)
* - BACK_URL (global, URL to return to on exit)
* - RosaryRing (global, from rosary.js)
*/
(function () {
'use strict';
if (!window.SLIDES || !SLIDES.length) {
console.error('No slides data found.');
return;
}
var currentIndex = 0;
// -----------------------------------------------------------------------
// Slide expansion — pre-split long prayers into "Part 1 / 2" / "Part 2 / 2"
// so text stays large and readable on Zoom / projector rather than shrinking
// to illegibility. Prayers with more than SPLIT_THRESHOLD combined lines are
// automatically split at the nearest paragraph break.
// -----------------------------------------------------------------------
var SPLIT_THRESHOLD = 10;
function countLines(text) {
if (!text || !text.trim()) return 0;
return text.split('\n').length;
}
function splitText(text) {
// Prefer splitting at paragraph breaks (\n\n)
var paras = text.split('\n\n');
if (paras.length >= 2) {
var mid = Math.ceil(paras.length / 2);
var p1 = paras.slice(0, mid).join('\n\n').trim();
var p2 = paras.slice(mid).join('\n\n').trim();
if (p1 && p2) return [p1, p2];
}
// Fall back: split at line midpoint
var lines = text.split('\n');
var mid = Math.ceil(lines.length / 2);
return [lines.slice(0, mid).join('\n').trim(), lines.slice(mid).join('\n').trim()];
}
function expandSlides(rawSlides) {
var result = [];
for (var i = 0; i < rawSlides.length; i++) {
var s = rawSlides[i];
var leaderLines = countLines(s.leader);
var allLines = countLines(s.all);
if (leaderLines + allLines <= SPLIT_THRESHOLD) {
result.push(s);
continue;
}
// Decide which field to split (the longer one)
var field = (allLines >= leaderLines) ? 'all' : 'leader';
var halves = splitText(s[field]);
if (!halves[0] || !halves[1]) { result.push(s); continue; } // safety
var p1 = Object.assign({}, s);
var p2 = Object.assign({}, s);
p1._partNum = 1; p1._partTotal = 2;
p2._partNum = 2; p2._partTotal = 2;
p2.bead_index = null; // bead was "prayed" in part 1
if (field === 'all') {
p1.all = halves[0];
p2.leader = '';
p2.all = halves[1];
} else {
p1.leader = halves[0];
p1.all = '';
p2.leader = halves[1];
}
result.push(p1, p2);
}
return result;
}
var slides = expandSlides(SLIDES);
var total = slides.length;
// localStorage key for resume position
var RESUME_KEY = 'rosary_pos_' + (window.SESSION_ID || '0');
// Pre-compute repeat-run info for every (possibly expanded) slide.
// Group consecutive slides by prayer content (leader + all text), not title —
// so opening Hail Marys "in Faith / Hope / Charity" and decade Hail Marys all
// detect as runs even though their titles differ.
var slideRunInfo = (function () {
var info = new Array(total).fill(null);
var i = 0;
while (i < total) {
var s = slides[i];
var key = s.type + '||' + (s.leader || '') + '||' + (s.all || '');
var start = i;
while (i < total) {
var si = slides[i];
var ki = si.type + '||' + (si.leader || '') + '||' + (si.all || '');
if (ki !== key) break;
i++;
}
var len = i - start;
if (len > 1) {
for (var j = start; j < i; j++) {
info[j] = { pos: j - start + 1, total: len };
}
}
}
return info;
})();
// Map bead index → first slide index that uses that bead.
// Used by bead click navigation so clicking a bead jumps to the right slide.
var beadToSlide = {};
(function () {
for (var i = 0; i < total; i++) {
var bi = slides[i].bead_index;
if (bi !== null && bi !== undefined && !(bi in beadToSlide)) {
beadToSlide[bi] = i;
}
}
})();
// Scan slides 0..upToIndex and return the highest non-null bead_index seen.
// Used so "between-bead" slides (Glory Be, Fatima, litanies) keep prayed
// beads red instead of resetting everything to gray.
function getLastPrayedBead(upToIndex) {
var last = null;
for (var i = 0; i <= upToIndex; i++) {
var bi = slides[i] ? slides[i].bead_index : null;
if (bi !== null && bi !== undefined) {
last = bi;
}
}
return last;
}
// DOM refs
var coverSlide = document.getElementById('cover-slide');
var prayerSlide = document.getElementById('prayer-slide');
var mysterySlide = document.getElementById('mystery-slide');
var litanySlide = document.getElementById('litany-slide');
var closingSlide = document.getElementById('closing-slide');
var btnPrev = document.getElementById('btn-prev');
var btnNext = document.getElementById('btn-next');
var btnExit = document.getElementById('btn-exit');
var btnAudio = document.getElementById('btn-audio');
var slideCounter = document.getElementById('slide-counter');
var resumeToast = document.getElementById('resume-toast');
// --------------------------------------------------------------------------
// Audio
// AUDIO_MANIFEST: {key: ext, ...} — provided by present.php
// AUDIO_BASE_URL: '/uploads/audio/'
// --------------------------------------------------------------------------
var AUDIO_PREF_KEY = 'rosary_audio'; // localStorage — global pref, not per-session
var audioEnabled = false;
var currentAudio = null;
var hasAudioFiles = window.AUDIO_MANIFEST && Object.keys(AUDIO_MANIFEST).length > 0;
if (hasAudioFiles) {
var stored = localStorage.getItem(AUDIO_PREF_KEY);
// Default ON when audio is available; user can mute
audioEnabled = (stored === null) ? true : (stored === 'on');
}
function updateAudioBtn() {
if (!btnAudio) return;
if (audioEnabled) {
btnAudio.innerHTML = '&#128264;'; // 🔊
btnAudio.title = 'Audio on — click to mute';
} else {
btnAudio.innerHTML = '&#128263;'; // 🔇
btnAudio.title = 'Audio off — click to enable';
}
}
function stopAudio() {
if (currentAudio) {
currentAudio.pause();
currentAudio.currentTime = 0;
currentAudio = null;
}
}
// Map a slide's id to a canonical audio key.
// Many slides share one recording (e.g. all 55 Hail Marys → 'hail_mary').
function getAudioKey(slide) {
if (!slide) return null;
var id = slide.id || '';
if (!id || id === 'cover') return null;
// Common prayers — many slides → one key
if (id === 'sign_of_cross' || id === 'dm_sign_of_cross') return 'sign_of_cross';
if (id === 'apostles_creed' || id === 'dm_apostles_creed') return 'apostles_creed';
if (id.indexOf('our_father') === 0 || id === 'dm_our_father_opening') return 'our_father';
if (id.indexOf('hail_mary') === 0 || id === 'dm_hail_mary_opening') return 'hail_mary';
if (id.indexOf('glory_be') === 0) return 'glory_be';
if (id.indexOf('fatima_') === 0) return 'fatima_prayer';
// Mysteries — unique per mystery
if (id.indexOf('mystery_') === 0) return id;
// Hail Holy Queen — both slides share one audio
if (id.indexOf('hail_holy_queen') === 0) return 'hail_holy_queen';
// Rosary closing prayer + generic closing
if (id === 'rosary_closing_prayer') return 'rosary_closing_prayer';
if (id === 'closing') return 'closing';
// Litany of Passion — unique per entry
if (id.indexOf('litany_passion_') === 0) return id;
// Novena deceased day prayers — unique per day
if (id.indexOf('novena_day_') === 0) return id;
// Litany for Departed — unique per entry
if (id.indexOf('litany_departed_') === 0) return id;
// Divine Mercy
if (id === 'dm_opening') return 'dm_opening';
if (id.indexOf('dm_blood_water') === 0) return 'dm_blood_water';
if (id.indexOf('dm_intention_day_') === 0) return id;
if (id.indexOf('dm_prayer_day_') === 0) return id;
if (id.indexOf('dm_eternal_father') === 0) return 'dm_eternal_father';
if (id.indexOf('dm_for_sake') === 0) return 'dm_for_sake';
if (id.indexOf('dm_holy_god') === 0) return 'dm_holy_god';
return id; // fallback: use slide ID directly
}
function playSlideAudio(slide) {
stopAudio();
if (!audioEnabled || !hasAudioFiles) return;
var key = getAudioKey(slide);
if (!key || !AUDIO_MANIFEST[key]) return;
var audio = new Audio(window.AUDIO_BASE_URL + key + '.' + AUDIO_MANIFEST[key]);
audio.play().catch(function () { /* silently skip — file may be absent */ });
currentAudio = audio;
}
if (btnAudio) {
btnAudio.addEventListener('click', function () {
audioEnabled = !audioEnabled;
try { localStorage.setItem(AUDIO_PREF_KEY, audioEnabled ? 'on' : 'off'); } catch (e) {}
updateAudioBtn();
if (!audioEnabled) stopAudio();
});
}
updateAudioBtn();
// Hide all slide panels
function hideAll() {
coverSlide.style.display = 'none';
prayerSlide.style.display = 'none';
mysterySlide.style.display = 'none';
litanySlide.style.display = 'none';
closingSlide.style.display = 'none';
}
// Helpers
function setText(id, value) {
var el = document.getElementById(id);
if (el) el.textContent = value || '';
}
function setHTML(id, value) {
var el = document.getElementById(id);
if (el) el.innerHTML = value || '';
}
function showEl(id) {
var el = document.getElementById(id);
if (el) el.style.display = '';
}
function hideEl(id) {
var el = document.getElementById(id);
if (el) el.style.display = 'none';
}
// Convert newlines to <br> for display, keeping pre-line behavior
function nl(text) {
if (!text) return '';
return text.replace(/\n/g, '\n'); // already handled by white-space: pre-line
}
// --------------------------------------------------------------------------
// Render a slide
// --------------------------------------------------------------------------
function render(index) {
hideAll();
var slide = slides[index];
if (!slide) return;
// Trigger CSS fade-in by re-inserting / touching the element
switch (slide.type) {
case 'cover':
renderCover(slide);
coverSlide.style.display = '';
break;
case 'mystery':
renderMystery(slide);
mysterySlide.style.display = '';
break;
case 'litany':
renderLitany(slide);
litanySlide.style.display = '';
break;
case 'closing':
renderClosing(slide);
closingSlide.style.display = '';
break;
default: // 'prayer'
renderPrayer(slide);
prayerSlide.style.display = '';
break;
}
// Update counter (cover is slide 0, not counted in "Prayer X of Y")
updateCounter(index);
// Show repeat badge when the same content repeats (e.g. Agnus Dei × 3)
updateRepeatBadge(index);
// Shrink text so the slide fits on screen without scrolling
fitTextToScreen();
// Update rosary bead ring — pass both the current bead and the last prayed bead
// so "between-bead" slides (Glory Be, Fatima, litanies) keep the ring colored.
if (typeof RosaryRing !== 'undefined') {
var currentBead = (slide.bead_index !== undefined) ? slide.bead_index : null;
var lastBead = getLastPrayedBead(index);
RosaryRing.update(currentBead, lastBead);
}
// Scroll slide content back to top on each navigation
var content = document.getElementById('slide-content');
if (content) content.scrollTop = 0;
// Update nav buttons
btnPrev.disabled = (index === 0);
btnNext.disabled = (index === total - 1);
}
function renderCover(slide) {
setText('cover-title', slide.title);
setText('cover-body', slide.all);
var photoWrap = document.getElementById('cover-photo-wrap');
var photoImg = document.getElementById('cover-photo');
if (slide.photo_path && photoImg) {
photoImg.src = slide.photo_path;
photoImg.style.display = '';
photoWrap.classList.remove('no-photo');
} else {
photoWrap.classList.add('no-photo');
}
}
function renderPrayer(slide) {
setText('slide-title', slide.title);
var hasLeader = !!(slide.leader && slide.leader.trim());
var hasAll = !!(slide.all && slide.all.trim());
if (hasLeader) {
showEl('leader-wrap');
setText('leader-text', slide.leader);
} else {
hideEl('leader-wrap');
}
if (hasAll) {
showEl('all-wrap');
setText('all-text', slide.all);
} else {
hideEl('all-wrap');
}
// Bump font size when only one section is present
var slideText = document.getElementById('slide-text');
if (slideText) {
if (hasLeader !== hasAll) {
slideText.classList.add('single-section');
} else {
slideText.classList.remove('single-section');
}
}
}
function renderMystery(slide) {
// title is like "The Third Sorrowful Mystery"
// leader is the name of the mystery
// all is the fruit/intention
setText('mystery-number', slide.title);
setText('mystery-title', slide.leader);
setText('mystery-fruit', slide.all);
}
function renderLitany(slide) {
setText('litany-title', slide.title);
var hasLeader = !!(slide.leader && slide.leader.trim());
var hasAll = !!(slide.all && slide.all.trim());
if (hasLeader) {
showEl('litany-leader-wrap');
setText('litany-leader', slide.leader);
} else {
hideEl('litany-leader-wrap');
}
if (hasAll) {
showEl('litany-all-wrap');
setText('litany-all', slide.all);
} else {
hideEl('litany-all-wrap');
}
}
function renderClosing(slide) {
setText('closing-title', slide.title);
setText('closing-subtitle', slide.subtitle || '');
setText('closing-body', slide.all);
var photoWrap = document.getElementById('closing-photo-wrap');
var photoImg = document.getElementById('closing-photo');
if (slide.photo_path && photoImg) {
photoImg.src = slide.photo_path;
photoWrap.style.display = '';
} else if (photoWrap) {
photoWrap.style.display = 'none';
}
}
// --------------------------------------------------------------------------
// fitTextToScreen — shrink prayer/litany text until the slide fits on screen
// without a scrollbar. Uses binary search over pixel font-size.
// Called after every render so long prayers (e.g. Day 5 novena, Concluding
// Prayer) automatically scale down rather than requiring a scroll.
// --------------------------------------------------------------------------
var FIT_TEXT_ELS = '#leader-text, #all-text, #litany-leader, #litany-all, #closing-body';
var FIT_MIN_PX = 22; // floor — stay readable for Zoom / projector audiences
function fitTextToScreen() {
var container = document.getElementById('slide-content');
if (!container) return;
var textEls = container.querySelectorAll(FIT_TEXT_ELS);
// Reset any previous override so we measure the natural (CSS) size
for (var k = 0; k < textEls.length; k++) {
textEls[k].style.fontSize = '';
}
// Already fits — nothing to do
if (container.scrollHeight <= container.clientHeight + 2) return;
if (!textEls.length) return; // no adjustable text (cover, mystery, etc.)
// Upper bound = current computed size; lower bound = readable minimum
var naturalPx = parseFloat(window.getComputedStyle(textEls[0]).fontSize);
var lo = FIT_MIN_PX;
var hi = naturalPx;
// Binary search: 20 iterations converges to < 0.1 px accuracy
for (var iter = 0; iter < 20; iter++) {
var mid = (lo + hi) / 2;
for (var k = 0; k < textEls.length; k++) {
textEls[k].style.fontSize = mid + 'px';
}
if (container.scrollHeight <= container.clientHeight + 2) {
lo = mid; // fits — try a touch larger
} else {
hi = mid; // overflows — try smaller
}
}
// Lock in the converged size
for (var k = 0; k < textEls.length; k++) {
textEls[k].style.fontSize = lo + 'px';
}
}
function updateCounter(index) {
var prayerTotal = total - 1; // exclude cover
if (index === 0) {
slideCounter.textContent = '';
} else {
slideCounter.textContent = 'Prayer ' + index + ' of ' + prayerTotal;
}
}
function updateRepeatBadge(index) {
// Hide every badge first (avoid NodeList.forEach for compatibility)
var allBadges = document.querySelectorAll('.repeat-badge');
for (var k = 0; k < allBadges.length; k++) {
allBadges[k].style.display = 'none';
allBadges[k].textContent = '';
}
var slide = slides[index];
// Part badge takes priority (long prayer split across slides)
var badgeText = '';
if (slide._partNum) {
badgeText = 'Part ' + slide._partNum + ' / ' + slide._partTotal;
} else {
var run = slideRunInfo[index];
if (run) badgeText = run.pos + ' of ' + run.total;
}
if (!badgeText) return;
// Show the badge inside the currently-visible slide panel
var panelId = (slide.type === 'litany') ? 'litany-slide' : 'prayer-slide';
var panel = document.getElementById(panelId);
var badge = panel ? panel.querySelector('.repeat-badge') : null;
if (badge) {
badge.textContent = badgeText;
badge.style.display = '';
}
}
// --------------------------------------------------------------------------
// Navigation
// --------------------------------------------------------------------------
function goTo(index) {
if (index < 0 || index >= total) return;
currentIndex = index;
render(currentIndex);
// Play audio for this slide (stops previous audio automatically)
playSlideAudio(slides[index]);
// Persist position so the user can resume after exiting.
// Clear it when they reach the closing slide (rosary complete).
try {
if (index > 0 && index < total - 1) {
localStorage.setItem(RESUME_KEY, index);
} else {
localStorage.removeItem(RESUME_KEY);
}
} catch (e) { /* storage unavailable */ }
}
function prev() { goTo(currentIndex - 1); }
function next() { goTo(currentIndex + 1); }
btnPrev.addEventListener('click', prev);
btnNext.addEventListener('click', next);
if (btnExit) {
btnExit.addEventListener('click', function () {
// Position already saved by goTo; navigate back
window.location.href = window.BACK_URL || '/';
});
}
// Keyboard
document.addEventListener('keydown', function (e) {
switch (e.key) {
case 'ArrowRight':
case 'ArrowDown':
case ' ':
e.preventDefault();
next();
break;
case 'ArrowLeft':
case 'ArrowUp':
e.preventDefault();
prev();
break;
case 'f':
case 'F':
toggleFullscreen();
break;
}
});
// Touch swipe
var touchStartX = null;
var touchStartY = null;
document.addEventListener('touchstart', function (e) {
touchStartX = e.touches[0].clientX;
touchStartY = e.touches[0].clientY;
}, { passive: true });
document.addEventListener('touchend', function (e) {
if (touchStartX === null) return;
var dx = e.changedTouches[0].clientX - touchStartX;
var dy = e.changedTouches[0].clientY - touchStartY;
// Only respond to mostly-horizontal swipes
if (Math.abs(dx) > Math.abs(dy) && Math.abs(dx) > 40) {
if (dx < 0) next();
else prev();
}
touchStartX = null;
touchStartY = null;
}, { passive: true });
// Fullscreen
function toggleFullscreen() {
if (!document.fullscreenElement) {
document.documentElement.requestFullscreen().catch(function () {});
} else {
document.exitFullscreen().catch(function () {});
}
}
// Re-fit text when the window is resized (e.g. projector moved to a
// different monitor, fullscreen toggled, or phone rotated).
var resizeTimer = null;
window.addEventListener('resize', function () {
clearTimeout(resizeTimer);
resizeTimer = setTimeout(function () { render(currentIndex); }, 150);
});
// --------------------------------------------------------------------------
// Initialize
// --------------------------------------------------------------------------
// Check for a saved resume position
var resumeIndex = 0;
try {
var saved = localStorage.getItem(RESUME_KEY);
if (saved !== null) {
var parsed = parseInt(saved, 10);
if (!isNaN(parsed) && parsed > 0 && parsed < total - 1) {
resumeIndex = parsed;
}
}
} catch (e) { /* storage unavailable */ }
render(resumeIndex);
currentIndex = resumeIndex;
// Show fade-out toast if resuming mid-prayer
if (resumeIndex > 0 && resumeToast) {
resumeToast.textContent = 'Resumed at prayer ' + resumeIndex + ' of ' + (total - 1);
resumeToast.classList.add('visible');
setTimeout(function () {
resumeToast.classList.remove('visible');
}, 2800);
}
// Wire bead clicks: jump to the first slide that uses that bead
if (typeof RosaryRing !== 'undefined' && RosaryRing.onBeadClick) {
RosaryRing.onBeadClick(function (beadIndex) {
if (beadIndex in beadToSlide) {
goTo(beadToSlide[beadIndex]);
}
});
}
})();