identicon.js

/**
Template Controllers

@module Templates
*/

/**
Return the user identity icon

@class [template] dapp_identicon
@constructor
*/

/**
The cached identicons

@property cache
*/
var cache = {};

Template["dapp_identicon"].helpers({
  /**
    Make sure the identity is lowercased

    @method (identity)
    */
  identity: function(identity) {
    return _.isString(this.identity)
      ? this.identity.toLowerCase()
      : this.identity;
  },
  /**
    Return the cached or generated identicon

    @method (identiconData)
    */
  identiconData: function(identity) {
    // remove items if the cache is larger than 50 entries
    if (_.size(cache) > 100) {
      delete cache[Object.keys(cache)[0]];
    }

    return (
      cache["ID_" + identity] ||
      (cache["ID_" + identity] = hqx(
        hqx(
          blockies.create({
            seed: identity,
            size: 8,
            scale: 1
          }),
          4
        ),
        4
      ).toDataURL())
    );
  },
  /**
    Return the cached or generated identicon

    @method (identiconDataPixel)
    */
  identiconDataPixel: function(identity) {
    return (
      cache["IDP_" + identity] ||
      (cache["IDP_" + identity] = blockies
        .create({
          seed: identity,
          size: 8,
          scale: 8
        })
        .toDataURL())
    );
  },
  /**
    Get the correct text, if TAPi18n is available.

    @method i18nText
    */
  i18nTextIcon: function() {
    if (
      typeof TAPi18n === "undefined" ||
      TAPi18n.__("elements.identiconHelper") == "elements.identiconHelper"
    ) {
      return "This is a security icon, if there's any change on the address the resulting icon should be a completelly different one";
    } else {
      return TAPi18n.__("elements.identiconHelper");
    }
  }
});