1 files changed, 65 insertions, 0 deletions
diff --git a/old-ui/lib/icon-factory.js b/old-ui/lib/icon-factory.js
new file mode 100644
index 000000000..27a74de66
--- /dev/null
+++ b/old-ui/lib/icon-factory.js
@@ -0,0 +1,65 @@
+var iconFactory
+const isValidAddress = require('ethereumjs-util').isValidAddress
+const toChecksumAddress = require('ethereumjs-util').toChecksumAddress
+const contractMap = require('eth-contract-metadata')
+
+module.exports = function (jazzicon) {
+  if (!iconFactory) {
+    iconFactory = new IconFactory(jazzicon)
+  }
+  return iconFactory
+}
+
+function IconFactory (jazzicon) {
+  this.jazzicon = jazzicon
+  this.cache = {}
+}
+
+IconFactory.prototype.iconForAddress = function (address, diameter) {
+  const addr = toChecksumAddress(address)
+  if (iconExistsFor(addr)) {
+    return imageElFor(addr)
+  }
+
+  return this.generateIdenticonSvg(address, diameter)
+}
+
+// returns svg dom element
+IconFactory.prototype.generateIdenticonSvg = function (address, diameter) {
+  var cacheId = `${address}:${diameter}`
+  // check cache, lazily generate and populate cache
+  var identicon = this.cache[cacheId] || (this.cache[cacheId] = this.generateNewIdenticon(address, diameter))
+  // create a clean copy so you can modify it
+  var cleanCopy = identicon.cloneNode(true)
+  return cleanCopy
+}
+
+// creates a new identicon
+IconFactory.prototype.generateNewIdenticon = function (address, diameter) {
+  var numericRepresentation = jsNumberForAddress(address)
+  var identicon = this.jazzicon(diameter, numericRepresentation)
+  return identicon
+}
+
+// util
+
+function iconExistsFor (address) {
+  return contractMap[address] && isValidAddress(address) && contractMap[address].logo
+}
+
+function imageElFor (address) {
+  const contract = contractMap[address]
+  const fileName = contract.logo
+  const path = `images/contract/${fileName}`
+  const img = document.createElement('img')
+  img.src = path
+  img.style.width = '75%'
+  return img
+}
+
+function jsNumberForAddress (address) {
+  var addr = address.slice(2, 10)
+  var seed = parseInt(addr, 16)
+  return seed
+}
+