From f002fac331c79baff7fde57899d76be0410ffe10 Mon Sep 17 00:00:00 2001
From: cel <cel@f/6sQ6d2CMxRUhLpspgGIulDxDCwYD7DzFzPNr7u5AU=.ed25519>
Date: Sat, 26 Jan 2019 15:02:43 -1000
Subject: Add /script route

---
 lib/app.js   | 24 ++++++++++++++++++++++++
 lib/serve.js | 18 ++++++++++++++++++
 2 files changed, 42 insertions(+)

(limited to 'lib')

diff --git a/lib/app.js b/lib/app.js
index e0b4417..0b7784c 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -42,6 +42,8 @@ function App(sbot, config) {
 
   var host1 = /:/.test(this.host) ? '[' + this.host + ']' : this.host
   this.baseUrl = 'http://' + host1 + ':' + this.port
+  this.dir = path.join(config.path, conf.dir || 'patchfoo')
+  this.scriptDir = path.join(this.dir, conf.scriptDir || 'script')
 
   var base = conf.base || '/'
   this.opts = {
@@ -78,6 +80,9 @@ function App(sbot, config) {
   this.about = new About(this, sbot.id, this.follows)
   this.serveSsbNpmRegistry = SsbNpmRegistry.respond(this.sbot, this.config)
 
+  this.mtimes = {}
+  this.getScript = memo({cache: false}, this.getScript)
+
   this.monitorBlobWants()
   this.navLinks = conf.nav || [
     'new',
@@ -1246,3 +1251,22 @@ App.prototype.verifyGitObjectSignature = function (obj, cb) {
     })
   }
 }
+
+App.prototype.getScript = function (filepath, cb) {
+  var filename = path.join(this.scriptDir, filepath)
+  var self = this
+  fs.stat(filename, function (err, stat) {
+    if (err) return cb(err)
+    var resolved = require.resolve(filename)
+    var prevMtime = self.mtimes[resolved]
+    var mtime = stat.mtime.getTime()
+    if (mtime !== prevMtime) {
+      delete require.cache[resolved]
+      self.mtimes[filename] = mtime
+    }
+    var module
+    try { module = require(resolved) }
+    catch(e) { return cb(e) }
+    cb(null, module)
+  })
+}
diff --git a/lib/serve.js b/lib/serve.js
index e3901a0..30b529b 100644
--- a/lib/serve.js
+++ b/lib/serve.js
@@ -390,6 +390,7 @@ Serve.prototype.path = function (url) {
     case '/shard': return this.shard(m[2])
     case '/zip': return this.zip(m[2])
     case '/web': return this.web(m[2])
+    case '/script': return this.script(m[2])
   }
   return this.respond(404, 'Not found')
 }
@@ -3043,6 +3044,23 @@ Serve.prototype.web = function (url) {
   })
 }
 
+Serve.prototype.script = function (url) {
+  var self = this
+  var filepath = url.split('?')[0]
+  this.app.getScript(filepath, function (err, fn) {
+    try {
+      if (err) throw err
+      fn(self)
+    } catch(e) {
+      return pull(
+        pull.once(u.renderError(e).outerHTML),
+        self.wrapPage('local: ' + path),
+        self.respondSink(400)
+      )
+    }
+  })
+}
+
 // wrap a binary source and render it or turn into an embed
 Serve.prototype.wrapBinary = function (opts) {
   var self = this
-- 
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