264 lines
16 KiB
JavaScript
264 lines
16 KiB
JavaScript
function createWeekCalendarImport() {
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const maxBytes=1024*1024;
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function clock(value) {
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const match=/^(\d{2}):(\d{2})$/.exec(String(value||''));
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if(!match)return null;
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const minutes=Number(match[1])*60+Number(match[2]);
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return Number(match[1])<24&&Number(match[2])<60?minutes:null;
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}
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function instant(value) {
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const match=/^(\d{4})(\d{2})(\d{2})T(\d{2})(\d{2})(\d{2})(Z?)$/.exec(value||'');
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if(!match)return null;
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const parts=match.slice(1,7).map(Number);
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const milliseconds=match[7]?Date.UTC(parts[0],parts[1]-1,parts[2],parts[3],parts[4],parts[5]):
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new Date(parts[0],parts[1]-1,parts[2],parts[3],parts[4],parts[5]).getTime();
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return Number.isFinite(milliseconds)?milliseconds:null;
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}
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function zonedInstant(value,timeZone) {
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if(!timeZone)return instant(value);
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const match=/^(\d{4})(\d{2})(\d{2})T(\d{2})(\d{2})(\d{2})$/.exec(value||'');
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if(!match)return null;
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try {
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const wanted=match.slice(1).map(Number),formatter=new Intl.DateTimeFormat('en-CA',{
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timeZone,year:'numeric',month:'2-digit',day:'2-digit',hour:'2-digit',minute:'2-digit',second:'2-digit',hourCycle:'h23',
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});
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let result=Date.UTC(wanted[0],wanted[1]-1,wanted[2],wanted[3],wanted[4],wanted[5]);
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for(let attempt=0;attempt<2;attempt+=1) {
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const shown=Object.fromEntries(formatter.formatToParts(new Date(result)).map(part=>[part.type,part.value]));
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const represented=Date.UTC(Number(shown.year),Number(shown.month)-1,Number(shown.day),Number(shown.hour),Number(shown.minute),Number(shown.second));
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result+=Date.UTC(wanted[0],wanted[1]-1,wanted[2],wanted[3],wanted[4],wanted[5])-represented;
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}
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return result;
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} catch(error) { return null; }
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}
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function supportedTimeZone(timeZone) {
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if(!timeZone)return true;
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try {new Intl.DateTimeFormat('en-US',{timeZone}).format(0);return true;}
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catch(error) {return false;}
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}
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function zoneParts(value,timeZone) {
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const date=new Date(value);
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if(!timeZone)return {year:date.getFullYear(),month:date.getMonth()+1,day:date.getDate(),weekday:date.getDay(),
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hour:date.getHours(),minute:date.getMinutes(),second:date.getSeconds()};
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const formatter=new Intl.DateTimeFormat('en-US',{timeZone,year:'numeric',month:'2-digit',day:'2-digit',
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hour:'2-digit',minute:'2-digit',second:'2-digit',weekday:'short',hourCycle:'h23'});
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const parts=Object.fromEntries(formatter.formatToParts(date).map(part=>[part.type,part.value]));
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return {year:Number(parts.year),month:Number(parts.month),day:Number(parts.day),
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weekday:['Sun','Mon','Tue','Wed','Thu','Fri','Sat'].indexOf(parts.weekday),hour:Number(parts.hour),
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minute:Number(parts.minute),second:Number(parts.second)};
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}
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function addCalendarDays(value,days,timeZone) {
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if(!timeZone) {const date=new Date(value);date.setDate(date.getDate()+days);return date.getTime();}
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const parts=zoneParts(value,timeZone),day=new Date(Date.UTC(parts.year,parts.month-1,parts.day+days));
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const wall=[day.getUTCFullYear(),String(day.getUTCMonth()+1).padStart(2,'0'),String(day.getUTCDate()).padStart(2,'0')].join('')+
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'T'+[parts.hour,parts.minute,parts.second].map(part=>String(part).padStart(2,'0')).join('');
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return zonedInstant(wall,timeZone);
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}
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function dateInstant(value) {
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const match=/^(\d{4})(\d{2})(\d{2})$/.exec(value||'');
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return match?new Date(Number(match[1]),Number(match[2])-1,Number(match[3])).getTime():null;
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}
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function events(source) {
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if(typeof source!=='string'||!source.includes('BEGIN:VCALENDAR'))throw new Error('Choose a valid .ics calendar file.');
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if(new TextEncoder().encode(source).length>maxBytes)throw new Error('Calendar files must be 1 MB or smaller.');
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const lines=source.replace(/\r\n[ \t]/g,'').split(/\r?\n/);
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const result=[];let current=null;
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lines.forEach(line=>{
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if(line==='BEGIN:VEVENT'){current={};return;}
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if(line==='END:VEVENT'){
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if((current?.unsupportedTimezone||(current?.start!=null&¤t?.end>current.start))&&
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current.status!=='CANCELLED'&¤t.transparency!=='TRANSPARENT')result.push(current);
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current=null;return;
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}
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if(!current)return;
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const separator=line.indexOf(':');if(separator<0)return;
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const property=line.slice(0,separator),parts=property.split(';'),name=parts[0],value=line.slice(separator+1);
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const parameters=Object.fromEntries(parts.slice(1).map(part=>part.split('=')));
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if(parameters.TZID&&!supportedTimeZone(parameters.TZID))current.unsupportedTimezone=true;
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const allDay=parameters.VALUE==='DATE',parsed=allDay?dateInstant(value):zonedInstant(value,parameters.TZID);
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if(name==='DTSTART'){current.start=parsed;current.timeZone=parameters.TZID||null;}
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if(name==='DTEND')current.end=parsed;
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if(name==='RRULE')current.rule=value;
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if(name==='RDATE')current.rdates=(current.rdates||[]).concat(value.split(',').map(item=>allDay?dateInstant(item):zonedInstant(item,parameters.TZID)).filter(value=>value!=null));
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if(name==='EXDATE')current.exdates=(current.exdates||[]).concat(value.split(',').map(item=>allDay?dateInstant(item):zonedInstant(item,parameters.TZID)).filter(value=>value!=null));
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if(name==='STATUS')current.status=value.toUpperCase();
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if(name==='TRANSP')current.transparency=value.toUpperCase();
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});
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return result;
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}
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function recurrenceRule(value) {
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return Object.fromEntries(String(value||'').split(';').filter(Boolean).map(part=>part.split('=')));
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}
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function supportedRecurrence(value) {
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const rule=recurrenceRule(value),keys=Object.keys(rule);
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if(!['DAILY','WEEKLY'].includes(rule.FREQ))return false;
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const allowed=new Set(['FREQ','COUNT','INTERVAL','UNTIL',...(rule.FREQ==='WEEKLY'?['BYDAY']:[])]);
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if(keys.some(key=>!allowed.has(key)))return false;
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if(rule.COUNT&&(!/^\d+$/.test(rule.COUNT)||Number(rule.COUNT)<1))return false;
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if(rule.INTERVAL&&(!/^\d+$/.test(rule.INTERVAL)||Number(rule.INTERVAL)<1))return false;
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if(rule.COUNT&&rule.UNTIL)return false;
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if(rule.UNTIL&&instant(rule.UNTIL)==null&&dateInstant(rule.UNTIL)==null)return false;
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return !rule.BYDAY||rule.BYDAY.split(',').every(day=>/^(MO|TU|WE|TH|FR|SA|SU)$/.test(day));
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}
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function occurrences(event,rangeStart,rangeEnd) {
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const duration=event.end-event.start,excluded=new Set(event.exdates||[]);
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if(!event.rule) {
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return [event.start,...(event.rdates||[])].filter((start,index,all)=>start<rangeEnd&&!excluded.has(start)&&all.indexOf(start)===index)
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.map(start=>({start,end:start+duration}));
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}
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const rule=recurrenceRule(event.rule);
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if(!['DAILY','WEEKLY'].includes(rule.FREQ))return [event];
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const count=Math.max(1,Math.min(Number(rule.COUNT)||10000,10000));
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const result=[];
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const weekdays={SU:0,MO:1,TU:2,WE:3,TH:4,FR:5,SA:6};
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const selected=new Set((rule.BYDAY||'').split(',').map(day=>weekdays[day]).filter(day=>day!=null));
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if(rule.FREQ==='WEEKLY'&&!selected.size)selected.add(zoneParts(event.start,event.timeZone).weekday);
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const interval=Math.max(1,Number(rule.INTERVAL)||1),origin=zoneParts(event.start,event.timeZone);
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const until=rule.UNTIL?(rule.UNTIL.endsWith('Z')?instant(rule.UNTIL):
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(zonedInstant(rule.UNTIL,event.timeZone)??dateInstant(rule.UNTIL))):null;
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const originDay=Date.UTC(origin.year,origin.month-1,origin.day);
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let start=event.start,matched=0;
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if(rule.FREQ==='DAILY'&&start+duration<=rangeStart) {
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const target=zoneParts(rangeStart-duration,event.timeZone);
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const targetDay=Date.UTC(target.year,target.month-1,target.day);
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const elapsed=Math.max(0,Math.floor((targetDay-originDay)/(24*60*60*1000)));
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const jumps=Math.floor(elapsed/interval);
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if(jumps) {start=addCalendarDays(start,jumps*interval,event.timeZone);matched=jumps;}
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while(start+duration<=rangeStart&&matched<count) {start=addCalendarDays(start,interval,event.timeZone);matched+=1;}
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}
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if(rule.FREQ==='WEEKLY'&&start+duration<=rangeStart) {
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const target=zoneParts(rangeStart-duration,event.timeZone);
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const targetDay=Date.UTC(target.year,target.month-1,target.day);
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const elapsed=Math.max(0,Math.floor((targetDay-originDay)/(24*60*60*1000)));
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const cycleDays=7*interval,cycles=Math.floor(elapsed/cycleDays),offset=elapsed-cycles*cycleDays;
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matched=cycles*selected.size;
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start=addCalendarDays(event.start,cycles*cycleDays+(offset>=7?offset:0),event.timeZone);
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while(start+duration<=rangeStart&&matched<count) {
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const cursor=zoneParts(start,event.timeZone),cursorDay=Date.UTC(cursor.year,cursor.month-1,cursor.day);
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const weeks=Math.floor((cursorDay-originDay)/(7*24*60*60*1000));
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if(weeks%interval===0&&selected.has(cursor.weekday))matched+=1;
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start=addCalendarDays(start,1,event.timeZone);
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}
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}
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while(start<rangeEnd&&matched<count&&(until==null||start<=until)) {
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const cursor=zoneParts(start,event.timeZone),cursorDay=Date.UTC(cursor.year,cursor.month-1,cursor.day);
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const weeks=Math.floor((cursorDay-originDay)/(7*24*60*60*1000));
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const matches=rule.FREQ==='DAILY'||(weeks%interval===0&&selected.has(cursor.weekday));
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if(matches) {
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matched+=1;
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if(!excluded.has(start))result.push({start,end:start+duration});
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}
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start=addCalendarDays(start,rule.FREQ==='DAILY'?interval:1,event.timeZone);
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}
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(event.rdates||[]).forEach(extra=>{
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if(extra<rangeEnd&&!excluded.has(extra)&&!result.some(item=>item.start===extra))result.push({start:extra,end:extra+duration});
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});
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return result;
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}
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function dayBoundary(date,minutes) {
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const [year,month,day]=date.split('-').map(Number);
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return new Date(year,month-1,day,Math.floor(minutes/60),minutes%60).getTime();
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}
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function localClock(value) {
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const date=new Date(value);
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return String(date.getHours()).padStart(2,'0')+':'+String(date.getMinutes()).padStart(2,'0');
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}
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function review(source,{dates,workdayStart='09:00',workdayEnd='17:00'}={}) {
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if(!Array.isArray(dates)||dates.length!==7)throw new Error('Week Ahead must contain seven dates.');
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const startMinute=clock(workdayStart),endMinute=clock(workdayEnd);
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if(startMinute==null||endMinute==null||endMinute<=startMinute)throw new Error('Working hours must end after they start.');
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const parsedEvents=events(source),rangeStart=dayBoundary(dates[0],0),rangeEnd=dayBoundary(dates[6],24*60);
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const unsupportedRecurrence=parsedEvents.filter(event=>event.rule&&!supportedRecurrence(event.rule)&&
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event.start<rangeEnd&&(event.end>rangeStart||event.rule)).length;
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const unsupportedTimezone=parsedEvents.filter(event=>event.unsupportedTimezone).length;
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const unsupported_count=unsupportedRecurrence+unsupportedTimezone;
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const calendarEvents=parsedEvents.filter(event=>!event.unsupportedTimezone).flatMap(event=>occurrences(event,rangeStart,rangeEnd));
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const days=dates.map(plan_date=>{
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const start=dayBoundary(plan_date,startMinute),end=dayBoundary(plan_date,endMinute);
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const ranges=calendarEvents.map(event=>[Math.max(start,event.start),Math.min(end,event.end)])
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.filter(range=>range[1]>range[0]).sort((left,right)=>left[0]-right[0]);
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const merged=[];
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ranges.forEach(range=>{
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const previous=merged[merged.length-1];
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if(previous&&range[0]<=previous[1])previous[1]=Math.max(previous[1],range[1]);
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else merged.push([...range]);
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});
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const busy_minutes=Math.round(merged.reduce((total,range)=>total+range[1]-range[0],0)/60000);
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const free_windows=[];let cursor=start;
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merged.forEach(range=>{
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if(range[0]>cursor)free_windows.push({start_time:localClock(cursor),end_time:localClock(range[0])});
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cursor=Math.max(cursor,range[1]);
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});
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if(cursor<end)free_windows.push({start_time:localClock(cursor),end_time:localClock(end)});
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return {plan_date,busy_minutes,capacity_minutes:endMinute-startMinute-busy_minutes,free_windows};
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});
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days.unsupported_count=unsupported_count;
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days.unsupported_timezone_count=unsupportedTimezone;
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return days;
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}
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function createWorkflow({controller,qs,onApplied=()=>{}}={}) {
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let reviewed=null,activeAvailability=null;
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const root=()=>qs('#week-capacity-import');
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function clear() {
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reviewed=null;
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qs('#week-capacity-file').value='';
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qs('#week-capacity-review').hidden=true;
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qs('#week-capacity-days').innerHTML='';
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qs('#apply-week-capacities').disabled=false;
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}
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function open() {
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clear();root().hidden=false;qs('#week-capacity-status').textContent='';
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qs('#week-capacity-file').focus?.();return true;
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}
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function cancel() {clear();root().hidden=true;return true;}
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function reviewSource(source) {
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const display=controller.dates();
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reviewed=review(source,{dates:display.map(item=>item.date),workdayStart:qs('#week-capacity-start').value,
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workdayEnd:qs('#week-capacity-end').value});
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qs('#week-capacity-days').innerHTML=reviewed.map((day,index)=>'<article class="week-capacity-day"><strong>'+
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display[index].label+'</strong><span>'+day.capacity_minutes+' min available</span><small>'+day.busy_minutes+
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' min busy during working hours</small></article>').join('');
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qs('#week-capacity-review').hidden=false;
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const unsupported=reviewed.unsupported_count||0;
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qs('#apply-week-capacities').disabled=unsupported>0;
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const kind=reviewed.unsupported_timezone_count?'calendar event':'recurring event';
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qs('#week-capacity-status').textContent=unsupported?
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unsupported+' '+kind+(unsupported===1?'':'s')+' could not be counted. Apply is unavailable; export a simpler seven-day calendar and try again.':
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'Review seven capacity totals. Calendar details stay on this device.';
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return reviewed.map(day=>({...day}));
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}
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async function apply() {
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if(!reviewed||reviewed.unsupported_count||!controller.stageCapacities(reviewed.map(day=>({
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plan_date:day.plan_date,capacity_minutes:day.capacity_minutes,
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}))))return false;
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qs('#apply-week-capacities').disabled=true;
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try {await controller.flush();activeAvailability=reviewed.map(day=>({plan_date:day.plan_date,
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free_windows:day.free_windows.map(window=>({...window}))}));cancel();onApplied();return true;}
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finally {qs('#apply-week-capacities').disabled=false;}
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}
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qs('#week-capacity-file')?.addEventListener('change',async event=>{
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const file=event.currentTarget.files?.[0];if(!file)return;
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try {
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if(file.size>maxBytes)throw new Error('Calendar files must be 1 MB or smaller.');
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reviewSource(await file.text());
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} catch(error) {clear();qs('#week-capacity-status').textContent=error.message||'Calendar could not be read.';}
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});
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qs('#cancel-week-capacity-import')?.addEventListener('click',cancel);
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qs('#apply-week-capacities')?.addEventListener('click',()=>apply().catch(error=>{
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qs('#week-capacity-status').textContent=(error.message||'Week Ahead sync is unavailable.')+' Capacities remain saved on this phone.';
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}));
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return {open,cancel,review:reviewSource,apply,state:()=>reviewed?reviewed.map(day=>({...day})):null,
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availability:()=>activeAvailability?activeAvailability.map(day=>({plan_date:day.plan_date,
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free_windows:day.free_windows.map(window=>({...window}))})):null};
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}
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function mount(controller,weekWorkflow,qs) {
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const workflow=createWorkflow({controller,qs,onApplied:weekWorkflow.renderReview});
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StackchainWeekCalendar.setAvailabilityProvider(workflow.availability);
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qs('#open-week-capacity-import').addEventListener('click',workflow.open);
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return workflow;
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}
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return {review,createWorkflow,mount};
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}
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const weekCalendarImport=createWeekCalendarImport();
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if(typeof module!=='undefined'&&module.exports)module.exports=weekCalendarImport;
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