feat: add temp dir function

package.json

@@ -11,6 +11,11 @@
     "src",
     "dist"
   ],
+  "browser": {
+    "fs-extra": false,
+    "./src/text-encoder.js": "./src/text-encoder.browser.js",
+    "./src/temp-dir.js": "./src/temp-dir.browser.js"
+  },
   "repository": "github:ipfs/js-ipfs-utils",
   "scripts": {
     "test": "aegir test",
@@ -34,6 +39,7 @@
     "iso-url": "^0.4.7",
     "it-glob": "0.0.7",
     "merge-options": "^2.0.0",
+    "nanoid": "^2.1.11",
     "node-fetch": "^2.6.0",
     "stream-to-it": "^0.2.0"
   },
@@ -52,9 +58,5 @@
     "Alex Potsides <[email protected]>",
     "Alan Shaw <[email protected]>",
     "Marcin Rataj <[email protected]>"
-  ],
-  "browser": {
-    "fs-extra": false,
-    "./src/text-encoder.js": "./src/text-encoder.browser.js"
-  }
+  ]
 }

src/temp-dir.browser.js

@@ -0,0 +1,15 @@
+'use strict'
+
+const nanoid = require('nanoid')
+
+/**
+ * Temporary folder
+ *
+ * @param {function(string): string} transform - Transform function to add prefixes or sufixes to the unique id
+ * @returns {string} - Full real path to a temporary folder
+ */
+const tempdir = (transform = d => d) => {
+  return transform(nanoid())
+}
+
+module.exports = tempdir

src/temp-dir.js

@@ -0,0 +1,19 @@
+'use strict'
+
+const fs = require('fs')
+const os = require('os')
+const path = require('path')
+const nanoid = require('nanoid')
+
+/**
+ * Temporary folder
+ *
+ * @param {function(string): string} transform - Transform function to add prefixes or sufixes to the unique id
+ * @returns {string} - Full real path to a temporary folder
+ */
+const tempdir = (transform = d => d) => {
+  const osTmpDir = fs.realpathSync(os.tmpdir())
+  return path.join(osTmpDir, transform(nanoid()))
+}
+
+module.exports = tempdir