add: support bare badge (without label & icon)

lib/bare.js

@@ -0,0 +1,45 @@
+const calcWidth = require('./calc-text-width.js').Verdana110
+const colorPresets = require('./color-presets.js')
+const sanitize = str => str.replace(/\u0026/g, '&').replace(/\u003C/g, '<')
+
+module.exports = ({ status, color, style }) => {
+  typeAssert(typeof status === 'string', '<status> must be string')
+  color = colorPresets[color] || color || colorPresets['blue']
+
+  const stTextWidth = calcWidth(status)
+  const stRectWidth = stTextWidth + 115
+
+  status = sanitize(status)
+
+  if (style === 'flat') {
+    return `<svg width="${stRectWidth / 10}" height="20" viewBox="0 0 ${stRectWidth} 200" xmlns="http://www.w3.org/2000/svg">
+  <g>
+    <rect fill="#${color}" x="0" width="${stRectWidth}" height="200"/>
+  </g>
+  <g fill="#fff" text-anchor="start" font-family="Verdana,DejaVu Sans,sans-serif" font-size="110">
+    <text x="65" y="148" textLength="${stTextWidth}" fill="#000" opacity="0.1">${status}</text>
+    <text x="55" y="138" textLength="${stTextWidth}">${status}</text>
+  </g>
+</svg>`
+  }
+
+  return `<svg width="${stRectWidth / 10}" height="20" viewBox="0 0 ${stRectWidth} 200" xmlns="http://www.w3.org/2000/svg">
+  <linearGradient id="a" x2="0" y2="100%">
+    <stop offset="0" stop-opacity=".1" stop-color="#EEE"/>
+    <stop offset="1" stop-opacity=".1"/>
+  </linearGradient>
+  <mask id="m"><rect width="${stRectWidth}" height="200" rx="30" fill="#FFF"/></mask>
+  <g mask="url(#m)">
+    <rect width="${stRectWidth}" height="200" fill="#${color}" x="0"/>
+    <rect width="${stRectWidth}" height="200" fill="url(#a)"/>
+  </g>
+  <g fill="#fff" text-anchor="start" font-family="Verdana,DejaVu Sans,sans-serif" font-size="110">
+    <text x="65" y="148" textLength="${stTextWidth}" fill="#000" opacity="0.25">${status}</text>
+    <text x="55" y="138" textLength="${stTextWidth}">${status}</text>
+  </g>
+</svg>`
+}
+
+const typeAssert = (assertion, message) => {
+  if (!assertion) throw new TypeError(message)
+}

lib/index.js

@@ -2,9 +2,16 @@ const calcWidth = require('./calc-text-width.js').Verdana110
 const colorPresets = require('./color-presets.js')
 const sanitize = str => str.replace(/\u0026/g, '&').replace(/\u003C/g, '<')
 
+const bare = require('./bare.js')
+
 module.exports = ({ subject, status, color, style, icon, iconWidth = 13 }) => {
   typeAssert(typeof subject === 'string', '<subject> must be string')
   typeAssert(typeof status === 'string', '<status> must be string')
+
+  if (!subject && !icon) {
+    return bare({ status, color, style })
+  }
+
   color = colorPresets[color] || color || colorPresets['blue']
   iconWidth = iconWidth * 10