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53 lines
1.4 KiB
53 lines
1.4 KiB
var iconFactory
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module.exports = function (jazzicon) {
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if (!iconFactory) {
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iconFactory = new IconFactory(jazzicon)
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}
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return iconFactory
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}
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function IconFactory (jazzicon) {
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this.jazzicon = jazzicon
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this.cache = {}
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}
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IconFactory.prototype.iconForAddress = function (address, diameter) {
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if (this.isCached(address, diameter)) {
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return this.cache[address][diameter]
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}
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const dataUri = this.generateNewUri(address, diameter)
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this.cacheIcon(address, diameter, dataUri)
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return dataUri
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}
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IconFactory.prototype.generateNewUri = function (address, diameter) {
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var numericRepresentation = jsNumberForAddress(address)
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var identicon = this.jazzicon(diameter, numericRepresentation)
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var identiconSrc = identicon.innerHTML
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var dataUri = 'data:image/svg+xml;charset=utf-8,' + encodeURIComponent(identiconSrc)
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return dataUri
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}
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IconFactory.prototype.cacheIcon = function (address, diameter, icon) {
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if (!(address in this.cache)) {
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var sizeCache = {}
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sizeCache[diameter] = icon
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this.cache[address] = sizeCache
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return sizeCache
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} else {
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this.cache[address][diameter] = icon
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return icon
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}
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}
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IconFactory.prototype.isCached = function (address, diameter) {
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return address in this.cache && diameter in this.cache[address]
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}
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function jsNumberForAddress (address) {
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var addr = address.slice(2, 10)
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var seed = parseInt(addr, 16)
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return seed
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}
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