Add Run.Que.Website server

This is a simple website server that uses que.run itself to host the que
webpages.

I had to rename Run.Que to Run.Que.Server because nix was
complaining about Run.Que being both a derivation and an attrset with
Run.Que.Website in it.

6 files changed, 221 insertions, 7 deletions

diff --git a/Run/Que.hs b/Run/Que/Server.hs
index cf9467b..1acbe60 100644
--- a/Run/Que.hs
+++ b/Run/Que/Server.hs
@@ -5,7 +5,7 @@
 
 {- | Interprocess communication
 -}
-module Run.Que
+module Run.Que.Server
   ( main
   )
 where
diff --git a/Run/Que/Website.hs b/Run/Que/Website.hs
new file mode 100644
index 0000000..1de6bca
--- /dev/null
+++ b/Run/Que/Website.hs
@@ -0,0 +1,45 @@
+-- | spawns a few processes that serve the que.run website
+module Run.Que.Website where
+
+import           Prelude
+import           System.Environment            as Environment
+import           System.FilePath                ( (</>) )
+import qualified System.Process                as Process
+
+main :: IO ()
+main = do
+  args <- Environment.getArgs
+  let [src, ns] = if length args == 2
+        then take 2 args
+        else if length args == 1
+          then args ++ ["/"]
+          else error "usage: que-website <srcdir> [namespace]"
+  homepage <- getHomepageHtml (src </> "style.css") (src </> "index.md")
+  client   <- readFile $ src </> "client.py"
+  putStrLn $ "serving " ++ src ++ " at " ++ ns
+  loop ns homepage client
+
+loop :: String -> FilePath -> FilePath -> IO ()
+loop ns homepage client =
+  serve (ns </> "index.html") homepage
+    >> serve (ns </> "_client/python") client
+    >> loop ns homepage client
+
+getHomepageHtml :: String -> String -> IO String
+getHomepageHtml style index = Process.readProcess
+  "pandoc"
+  [ "--self-contained"
+  , "--css"
+  , style
+  , "-i"
+  , index
+  , "--from"
+  , "markdown"
+  , "--to"
+  , "html"
+  ]
+  []
+
+serve :: FilePath -> FilePath -> IO ()
+serve path file =
+  Process.callProcess "curl" ["https://que.run" ++ path, "-d", file]
diff --git a/Run/Que/client.py b/Run/Que/client.py
new file mode 100755
index 0000000..8058a05
--- /dev/null
+++ b/Run/Que/client.py
@@ -0,0 +1,95 @@
+#!/usr/bin/env python3
+"""
+simple client for que.run
+"""
+
+import argparse
+import urllib.request as request
+import urllib.parse
+import time
+import subprocess
+import sys
+
+# set to something ridiculously high so we don't run into timeouts while polling
+# or waiting for a message
+MAX_TIMEOUT = 100000000
+
+
+def main(argv=None):
+    cli = argparse.ArgumentParser(description=__doc__)
+    cli.add_argument(
+        "--host", default="https://que.run", help="where que-server is running"
+    )
+    cli.add_argument(
+        "--poll", default=False, action="store_true", help="stream data from the que"
+    )
+    cli.add_argument(
+        "--then",
+        help="when polling, run this shell command after each response, replacing '\que' with the target and '\msg' with the body of the response",
+    )
+    cli.add_argument(
+        "--serve",
+        default=False,
+        action="store_true",
+        help="when posting to the que, do so continuously in a loop. this can be used for serving a webpage or other file continuously",
+    )
+    cli.add_argument(
+        "target", help="namespace and path of the que, like 'ns/path/subpath'"
+    )
+    cli.add_argument(
+        "infile",
+        nargs="?",
+        type=argparse.FileType("r"),
+        help="data to put on the que. Use '-' for stdin, otherwise should be a readable file",
+    )
+
+    if argv is None:
+        args = cli.parse_args()
+    else:
+        args = cli.parse_args(argv)
+
+    if args.infile:
+        # send input data
+        data = args.infile.read().encode("utf-8").strip()
+        if args.serve:
+            # loop until ^C
+            while not time.sleep(1):
+                with request.urlopen(
+                    f"{args.host}/{args.target}", data=data, timeout=MAX_TIMEOUT
+                ) as req:
+                    pass
+        else:
+            with request.urlopen(
+                f"{args.host}/{args.target}", data=data, timeout=MAX_TIMEOUT
+            ) as req:
+                pass
+    else:
+        # no input data, do a read instead
+        params = urllib.parse.urlencode({"poll": args.poll})
+        url = f"{args.host}/{args.target}?{params}"
+        with request.urlopen(url) as req:
+            if args.poll:
+                while not time.sleep(1):
+                    msg = req.readline().decode("utf-8").strip()
+                    print(msg)
+                    if args.then:
+                        subprocess.run(
+                            args.then.replace("\msg", msg).replace("\que", args.target),
+                            shell=True,
+                        )
+            else:
+                msg = req.read().decode("utf-8").strip()
+                print(msg)
+                if args.then:
+                    subprocess.run(
+                        args.then.replace("\msg", msg).replace("\que", args.target),
+                        shell=True,
+                    )
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        print("Interrupted")
+        sys.exit(0)
diff --git a/Run/Que/index.md b/Run/Que/index.md
new file mode 100644
index 0000000..b619de7
--- /dev/null
+++ b/Run/Que/index.md
@@ -0,0 +1,68 @@
+% que.run
+
+que is the concurrent, async runtime in the cloud
+
+  - runtime concurrency anywhere you have a network connection
+  - multilanguage communicating sequential processes
+  - add Go-like channels to any language
+  - connect your microservices together with the simplest possible
+    plumbing
+  - async programming as easy as running two terminal commands
+
+HTTP routes on que.run are Golang-like channels with a namespace and a
+path. For example: `https://que.run/example/path/subpath`.
+
+## download the client
+
+There is a simple script `que` that acts as a client you can use to
+interact with the `que.run` service.
+
+Download it to somewhere on your `$PATH` and make it executable:
+
+    curl https://que.run/_client/python > ~/bin/que
+    chmod +x ~/bin/que
+    que --help
+
+The client requires a recent version of Python 3.
+
+## examples
+
+Here are some example applications, I will update these in the coming
+weeks with additional useful scripts.
+
+### desktop notifications
+
+Lets say we are running a job that takes a long time, maybe we are
+compiling or running a large test suite. Instead of watching the
+terminal until it completes, or flipping back to check on it every so
+often, we can create a listener that displays a popup notification when
+the job finishes.
+
+In one terminal run the listener:
+
+    que example/notify --then "notify-send '\que' '\msg'"
+
+In some other terminal run the job that takes forever:
+
+    runtests ; echo "tests are done" | que example/notify -
+
+When terminal 2 succeeds, terminal 1 will print "tests are done", then
+call the `notify-send` command, which displays a notification toast in
+Linux with title "`example/notify`" and content "`tests are done`".
+
+Que paths are multi-producer and multi-consumer, so you can add as many
+terminals as you want.
+
+On macOS you could use:
+
+    osascript -e 'display notification "\msg" with title "\que"'
+
+in place of notify-send.
+
+### ephemeral, serverless chat rooms
+
+coming soon...
+
+### collaborative jukebox
+
+coming soon...
diff --git a/Run/Que/style.css b/Run/Que/style.css
new file mode 100644
index 0000000..fa73fa4
--- /dev/null
+++ b/Run/Que/style.css
@@ -0,0 +1,4 @@
+/* perfect motherfucking css framework */
+body{max-width:650px;margin:40px auto;padding:0 10px;font:18px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";color:#444}h1,h2,h3{line-height:1.2}@media (prefers-color-scheme: dark){body{color:white;background:#444}a:link{color:#5bf}a:visited{color:#ccf}}
+
+/* my stuff */
diff --git a/default.nix b/default.nix
index 54db612..13ded48 100644
--- a/default.nix
+++ b/default.nix
@@ -49,7 +49,7 @@ in rec {
     };
   };
   Com.Simatime.Serval = buildOS {
-    deps = { que-server = Run.Que; };
+    deps = { que-server = Run.Que.Server; };
     configuration = {
       imports = [
         ./Com/Simatime/packages.nix
@@ -161,19 +161,21 @@ in rec {
       ];
     };
   };
-  Run.Que = buildGhc {
-    name = "Run.Que";
+  Run.Que.Server = buildGhc {
+    name = "Run.Que.Server";
     nick = "que-server";
     deps = [
-      "aeson"
       "async"
       "protolude"
       "scotty"
-      "servant"
-      "servant-server"
       "stm"
       "unagi-chan"
       "unordered-containers"
     ];
   };
+  Run.Que.Website = buildGhc {
+    name = "Run.Que.Website";
+    nick = "que-website";
+    deps = [ "process" ];
+  };
 }