docs: Lamport clock docs. (#77)

* docs: Lamport clock docs.

* docs: Formatting.

* docs: Formatting.

* docs: Formatting.

src/identities/providers/publickey.js

@@ -44,8 +44,8 @@ const PublicKeyIdentityProvider = ({ keystore }) => {
   /**
    * Gets the id.
    * @memberof module:IdentityProviders.IdentityProvider-PublicKey
-   * @param {String} id The id to retrieve.
+   * @param {string} id The id to retrieve.
-   * @return {String} The identity's id.
+   * @return {string} The identity's id.
    * @instance
    */
   const getId = async ({ id } = {}) => {

src/oplog/clock.js

@@ -1,4 +1,19 @@
-/* Lamport Clock */
+/**
+ * @module Clock
+ * @description
+ * The lamport clock.
+ */
+
+/**
+ * Compares two clocks by time and then, time is the same, by id.
+ *
+ * compareClocks should never return zero (0). If it does, a and b refer to the
+ * same clock.
+ * @param {module:Clock} a The first clock.
+ * @param {module:Clock} b The second clock.
+ * @return {number} Returns a negative integer if clock a is less than clock b
+ * otherwise a positive integer is returned.
+ */
 const compareClocks = (a, b) => {
   // Calculate the "distance" based on the clock, ie. lower or greater
   const dist = a.time - b.time
@@ -10,10 +25,22 @@ const compareClocks = (a, b) => {
   return dist
 }
 
+/**
+ * Advances a clock's time by 1, returning a new instance of Clock.
+ * @param {module:Clock} clock The clock to advance.
+ * @return {module:Clock} A new instance of clock with time advanced by 1.
+ */
 const tickClock = (clock) => {
   return Clock(clock.id, ++clock.time)
 }
 
+/**
+ * Creates an instance of Clock.
+ * @function
+ * @param {string} id A unique identifier.
+ * @param {number} [time=0] A natural number (including 0).
+ * @instance
+ */
 const Clock = (id, time) => {
   time = time || 0
 

src/oplog/conflict-resolution.js

@@ -26,7 +26,10 @@ function LastWriteWins (a, b) {
  * Sort two entries by their clock time.
  * @param {Entry} a First entry to compare
  * @param {Entry} b Second entry to compare
- * @param {function(a, b)} resolveConflict A function to call if entries are concurrent (happened at the same time). The function should take in two entries and return 1 if the first entry should be chosen and -1 if the second entry should be chosen.
+ * @param {function(a, b)} resolveConflict A function to call if entries are
+ * concurrent (happened at the same time). The function should take in two
+ * entries and return 1 if the first entry should be chosen and -1 if the
+ * second entry should be chosen.
  * @return {number} 1 if a is greater, -1 if b is greater
  */
 function SortByClocks (a, b, resolveConflict) {
@@ -41,7 +44,9 @@ function SortByClocks (a, b, resolveConflict) {
  * Sort two entries by their clock id.
  * @param {Entry} a First entry to compare
  * @param {Entry} b Second entry to compare
- * @param {function(a, b)} resolveConflict A function to call if the clocks ids are the same. The function should take in two entries and return 1 if the first entry should be chosen and -1 if the second entry should be chosen.
+ * @param {function(a, b)} resolveConflict A function to call if the clocks ids
+ * are the same. The function should take in two entries and return 1 if the
+ * first entry should be chosen and -1 if the second entry should be chosen.
  * @return {number} 1 if a is greater, -1 if b is greater
  */
 function SortByClockId (a, b, resolveConflict) {
@@ -53,7 +58,8 @@ function SortByClockId (a, b, resolveConflict) {
 }
 
 /**
- * A wrapper function to throw an error if the results of a passed function return zero
+ * A wrapper function to throw an error if the results of a passed function
+ * return zero
  * @param {function(a, b)} [tiebreaker] The tiebreaker function to validate.
  * @return {function(a, b)} 1 if a is greater, -1 if b is greater
  * @throws {Error} if func ever returns 0

src/oplog/entry.js

@@ -17,10 +17,13 @@ const hashStringEncoding = base58btc
  * Create an Entry
  * @param {Identity} identity The identity instance
  * @param {string} logId The unique identifier for this log
- * @param {*} data Data of the entry to be added. Can be any JSON.stringifyable data
+ * @param {*} data Data of the entry to be added. Can be any JSON.stringifyable
- * @param {Clock} [clock] The clock
+ * data.
- * @param {Array<string|Entry>} [next=[]] An array of CIDs as base58btc encoded strings
+ * @param {module:Clock} [clock] The clock
- * @param {Array<string|Entry>} [refs=[]] An array of CIDs as base58btc encoded strings
+ * @param {Array<string|Entry>} [next=[]] An array of CIDs as base58btc encoded
+ * strings.
+ * @param {Array<string|Entry>} [refs=[]] An array of CIDs as base58btc encoded
+ * strings.
  * @return {Promise<Entry>}
  * @example
  * const entry = await Entry.create(identity, 'log1', 'hello')
@@ -59,7 +62,8 @@ const create = async (identity, id, payload, clock = null, next = [], refs = [])
  *
  * @param {Identities} identities Identities system to use
  * @param {Entry} entry The entry being verified
- * @return {Promise} A promise that resolves to a boolean value indicating if the signature is valid
+ * @return {Promise} A promise that resolves to a boolean value indicating if
+ * the signature is valid.
  */
 const verify = async (identities, entry) => {
   if (!identities) throw new Error('Identities is required, cannot verify entry')

src/oplog/log.js

@@ -45,7 +45,7 @@ const DefaultAccessController = async () => {
  * @param {Object} options.access AccessController (./default-access-controller)
  * @param {Array<Entry>} options.entries An Array of Entries from which to create the log
  * @param {Array<Entry>} options.heads Set the heads of the log
- * @param {Clock} options.clock Set the clock of the log
+ * @param {module:Clock} options.clock Set the clock of the log
  * @param {Function} options.sortFn The sort function - by default LastWriteWins
  * @return {module:Log~Log} sync An instance of Log
  * @memberof module:Log
@@ -80,7 +80,7 @@ const Log = async (identity, { logId, logHeads, access, entryStorage, headsStora
 
   /**
    * Returns the clock of the log.
-   * @return {Clock}
+   * @return {module:Clock}
    * @memberof module:Log~Log
    * @instance
    */

src/sync.js

@@ -18,26 +18,29 @@ const DefaultTimeout = 30000 // 30 seconds
  * When Sync is started, a peer subscribes to a pubsub topic of the log's id.
  * Upon subscribing to the topic, peers already connected to the topic receive
  * the subscription message and "dial" the subscribing peer using a libp2p
- * custom protocol. Once connected to the subscribing peer on a direct peer-to-peer
+ * custom protocol. Once connected to the subscribing peer on a direct
- * connection, the dialing peer and the subscribing peer exchange the heads of the Log
+ * peer-to-peer connection, the dialing peer and the subscribing peer exchange * the heads of the Log each peer currently has. Once completed, the peers have * the same "local state".
- * each peer currently has. Once completed, the peers have the same "local state".
  *
- * Once the initial sync has completed, peers notify one another of updates to the
+ * Once the initial sync has completed, peers notify one another of updates to
- * log, ie. updates to the database, using the initially opened pubsub topic subscription.
+ * the log, ie. updates to the database, using the initially opened pubsub
- * A peer with new heads broadcasts changes to other peers by publishing the updated heads
+ * topic subscription.
- * to the pubsub topic. Peers subscribed to the same topic will then receive the update and
+ * A peer with new heads broadcasts changes to other peers by publishing the
+ * updated heads
+ * to the pubsub topic. Peers subscribed to the same topic will then receive
+ * the update and
  * will update their log's state, the heads, accordingly.
  *
- * The Sync Protocol is eventually consistent. It guarantees that once all messages
+ * The Sync Protocol is eventually consistent. It guarantees that once all
- * have been sent and received, peers will observe the same log state and values.
+ * messages have been sent and received, peers will observe the same log state
- * The Sync Protocol does not guarantee the order in which messages are received or
+ * and values. The Sync Protocol does not guarantee the order in which messages
- * even that a message is recieved at all, nor any timing on when messages are received.
+ * are received or even that a message is recieved at all, nor any timing on
+ * when messages are received.
  *
- * Note that the Sync Protocol does not retrieve the full log when synchronizing the
+ * Note that the Sync Protocol does not retrieve the full log when
- * heads. Rather only the "latest entries" in the log, the heads, are exchanged. In order
+ * synchronizing the heads. Rather only the "latest entries" in the log, the
- * to retrieve the full log and each entry, the user would call the log.traverse() or
+ * heads, are exchanged. In order to retrieve the full log and each entry, the
- * log.iterator() functions, which go through the log and retrieve each missing
+ * user would call the log.traverse() or log.iterator() functions, which go
- * log entry from IPFS.
+ * through the log and retrieve each missing log entry from IPFS.
  *
  * @example
  * // Using defaults
@@ -59,11 +62,13 @@ const DefaultTimeout = 30000 // 30 seconds
  * @param {Object} params One or more parameters for configuring Sync.
  * @param {IPFS} params.ipfs An IPFS instance.
  * @param {Log} params.log The log instance to sync.
- * @param {EventEmitter} [params.events] An event emitter to use. Events emitted are 'join', 'leave' and 'error'. If the parameter is not provided, an EventEmitter will be created.
+ * @param {EventEmitter} [params.events] An event emitter to use. Events
- * @param {onSynced} [params.onSynced] A callback function that is called after the peer
+ * emitted are 'join', 'leave' and 'error'. If the parameter is not provided,
- * has received heads from another peer.
+ * an EventEmitter will be created.
- * @param {Boolean} [params.start] True if sync should start automatically, false
+ * @param {onSynced} [params.onSynced] A callback function that is called after
- * otherwise. Defaults to true.
+ * the peer has received heads from another peer.
+ * @param {Boolean} [params.start] True if sync should start automatically,
+ * false otherwise. Defaults to true.
  * @return {module:Sync~Sync} sync An instance of the Sync Protocol.
  * @memberof module:Sync
  * @instance