From 03f4d418c0fa3f2bcaf8f50103ae275c7990142b Mon Sep 17 00:00:00 2001
From: Karissa McKelvey <karissa@users.noreply.github.com>
Date: Fri, 9 Dec 2016 12:27:11 -0800
Subject: [PATCH] attempt to implement temp for clone command. (#19)

* attempt to implement temp for clone command.

* add --temp doc
---
 lib/commands/clone.js |  8 ++++++-
 lib/download.js       |  2 ++
 package.json          |  1 +
 readme.md             |  5 ++++-
 tests/clone.js        | 50 +++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 64 insertions(+), 2 deletions(-)

diff --git a/lib/commands/clone.js b/lib/commands/clone.js
index 94b2a53..f32ab11 100644
--- a/lib/commands/clone.js
+++ b/lib/commands/clone.js
@@ -5,7 +5,13 @@ var download = require('../download')
 module.exports = {
   name: 'clone',
   command: clone,
-  options: []
+  options: [
+    {
+      name: 'temp',
+      boolean: true,
+      default: false
+    }
+  ]
 }
 
 function clone (opts) {
diff --git a/lib/download.js b/lib/download.js
index 5a4cf4f..9c4e1f0 100644
--- a/lib/download.js
+++ b/lib/download.js
@@ -1,6 +1,7 @@
 var assert = require('assert')
 var logger = require('status-logger')
 var prettyBytes = require('pretty-bytes')
+var memdb = require('memdb')
 var Dat = require('dat-node')
 var ui = require('./ui')
 
@@ -45,6 +46,7 @@ module.exports = function (type, opts, dat) {
   }, opts.logspeed)
 
   // Action starts here
+  if (opts.temp) opts.db = memdb()
   if (!dat) Dat(opts.dir, opts, start)
   else start(null, dat)
 
diff --git a/package.json b/package.json
index 8629573..ffcef5b 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
     "dat-doctor": "^1.0.1",
     "dat-key-as": "^1.0.0",
     "dat-node": "^1.0.0-alpha.2.1.0",
+    "memdb": "^1.3.1",
     "pretty-bytes": "^4.0.2",
     "progress-string": "^1.2.1",
     "status-logger": "^3.0.0",
diff --git a/readme.md b/readme.md
index 4ade84a..5800fd2 100644
--- a/readme.md
+++ b/readme.md
@@ -24,11 +24,14 @@ Start sharing your Dat Archive over the network. Will import new or updated file
 ### Downloading
 
 ```
-dat-next clone <dat-link> [<folder>]
+dat-next clone <dat-link> [<folder>] [--temp]
 ```
 
 Clone a remote Dat Archive to a local folder. Will create a folder with the key name is no folder is specified.
 
+##### Options
+
+`--temp`: Creates a temporary database and doesn't save the metadata to disk, only the latest files.
 
 ```
 dat-next pull [--dir=<folder>]
diff --git a/tests/clone.js b/tests/clone.js
index 9c65759..92d7a7e 100644
--- a/tests/clone.js
+++ b/tests/clone.js
@@ -94,6 +94,56 @@ test('close sharer', function (t) {
   })
 })
 
+test('clone - with --temp', function (t) {
+  // cmd: dat clone <link>
+  help.shareFixtures(function (_, fixturesDat) {
+    shareDat = fixturesDat
+    var key = shareDat.key.toString('hex')
+    var cmd = dat + ' clone ' + key + ' --temp'
+    var st = spawn(t, cmd, {cwd: baseTestDir})
+    var datDir = path.join(baseTestDir, key)
+    st.stdout.match(function (output) {
+      var downloadFinished = output.indexOf('Download Finished') > -1
+      if (!downloadFinished) return false
+
+      var stats = shareDat.stats.get()
+      var fileRe = new RegExp(stats.filesTotal + ' files')
+      var bytesRe = new RegExp(/1\.\d{1,2} kB/)
+
+      t.ok(help.matchLink(output), 'prints link')
+      t.ok(output.indexOf('dat-download-folder/' + key) > -1, 'prints dir')
+      t.ok(output.match(fileRe), 'total size: files okay')
+      t.ok(output.match(bytesRe), 'total size: bytes okay')
+      t.ok(help.isDir(datDir), 'creates download directory')
+
+      var fileList = help.fileList(datDir).join(' ')
+      var hasCsvFile = fileList.indexOf('all_hour.csv') > -1
+      t.ok(hasCsvFile, 'csv file downloaded')
+      var hasDatFolder = fileList.indexOf('.dat') > -1
+      t.ok(!hasDatFolder, '.dat folder not created')
+      var hasSubDir = fileList.indexOf('folder') > -1
+      t.ok(hasSubDir, 'folder created')
+      var hasNestedDir = fileList.indexOf('nested') > -1
+      t.ok(hasNestedDir, 'nested folder created')
+      var hasHelloFile = fileList.indexOf('hello.txt') > -1
+      t.ok(hasHelloFile, 'hello.txt file downloaded')
+
+      st.kill()
+      return true
+    })
+    st.succeeds('exits after finishing download')
+    st.stderr.empty()
+    st.end()
+  })
+})
+
+test('close sharer', function (t) {
+  shareDat.close(function () {
+    rimraf.sync(path.join(shareDat.path, '.dat'))
+    t.end()
+  })
+})
+
 test.onFinish(function () {
   rimraf.sync(baseTestDir)
 })