hyperlog-calendar-index

hyperlog index for recurring and one-time events

example

var hyperlog = require('hyperlog')
var memdb = require('memdb')
var xtend = require('xtend')
var cali = require('hyperlog-calendar-index')

var log = hyperlog(memdb(), { valueEncoding: 'json' })
var cal = cali({
  log: log,
  db: memdb(),
  map: function (row, next) {
    next(null, xtend(row, {
      type: 'put',
      time: row.value.time,
      created: row.value.created,
      value: { title: row.value.title }
    }))
  }
})
log.add(null, {
  title: 'javascript study group',
  time: 'every thursday at 7pm'
})
log.add(null, {
  title: 'hardware hack night',
  time: 'every tuesday at 7pm'
})
log.add(null, {
  title: 'cyberwizard institute',
  time: 'every day at 12:00 starting jan 15 until feb 10',
  created: '2015-12-25'
})

cal.query({
  gt: '2016-01-01',
  lt: '2016-01-31'
}).on('data', console.log)

output:

{ key: '5d368ce0cd31345a9bf9a0b2cb870460a2b1a1adbb651af1323afec1c0a1458f',
  time: Tue Jan 05 2016 19:00:00 GMT+0100 (CET),
  value: { title: 'hardware hack night' } }
{ key: 'c4c5ecdb896d0a13777d701e3dc8bed3e64a2b54812c9f8537c540bdef699fde',
  time: Thu Jan 07 2016 19:00:00 GMT+0100 (CET),
  value: { title: 'javascript study group' } }
{ key: '5d368ce0cd31345a9bf9a0b2cb870460a2b1a1adbb651af1323afec1c0a1458f',
  time: Tue Jan 12 2016 19:00:00 GMT+0100 (CET),
  value: { title: 'hardware hack night' } }
{ key: 'c4c5ecdb896d0a13777d701e3dc8bed3e64a2b54812c9f8537c540bdef699fde',
  time: Thu Jan 14 2016 19:00:00 GMT+0100 (CET),
  value: { title: 'javascript study group' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Fri Jan 15 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Sat Jan 16 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Sun Jan 17 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Mon Jan 18 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Tue Jan 19 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: '5d368ce0cd31345a9bf9a0b2cb870460a2b1a1adbb651af1323afec1c0a1458f',
  time: Tue Jan 19 2016 19:00:00 GMT+0100 (CET),
  value: { title: 'hardware hack night' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Wed Jan 20 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Thu Jan 21 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'c4c5ecdb896d0a13777d701e3dc8bed3e64a2b54812c9f8537c540bdef699fde',
  time: Thu Jan 21 2016 19:00:00 GMT+0100 (CET),
  value: { title: 'javascript study group' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Fri Jan 22 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Sat Jan 23 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Sun Jan 24 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Mon Jan 25 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Tue Jan 26 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: '5d368ce0cd31345a9bf9a0b2cb870460a2b1a1adbb651af1323afec1c0a1458f',
  time: Tue Jan 26 2016 19:00:00 GMT+0100 (CET),
  value: { title: 'hardware hack night' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Wed Jan 27 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Thu Jan 28 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'c4c5ecdb896d0a13777d701e3dc8bed3e64a2b54812c9f8537c540bdef699fde',
  time: Thu Jan 28 2016 19:00:00 GMT+0100 (CET),
  value: { title: 'javascript study group' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Fri Jan 29 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }
{ key: 'b293200589c8fc5c127b9fbe5901e0c102623598a797b8a204b1d8a1439d90cd',
  time: Sat Jan 30 2016 12:00:00 GMT+0100 (CET),
  value: { title: 'cyberwizard institute' } }

api

var cali = require('hyperlog-calendar-index')

var cal = cali(opts)

opts are:

• opts.log - a hyperlog to index

• opts.db - a leveldb to use for index storage

• opts.map(row, next) - a function that is called with each row in the hyperlog and should call next(err, doc) with a falsy value or a doc object:

• doc.type - 'put' or 'del' (default: 'put')

• doc.time - the time string of the event

• doc.created - the time (string or Date object) that the doc.time time string is relative to

• doc.value - an additional value to associate with the event (default: {})

If you need to delete a record, all your map function needs to provide is a document with: { type: 'del' }.

The default map function is function (row) { return row.value }.

cal.ready(fn)

Calls fn() when the index is caught up.

cal.query(opts, cb)

Return a readable stream of all events between opts.gt and opts.lt, including all instances of recurring events.

If cb is given, cb(err, results) fires with an array of all the results.

install

npm install hyperlog-calendar-index

license

BSD