Draft nodemedia command

Server side still has some limitations, but it functions when
going downhill with a tailwind while spewing error messages.

confluent_client/bin/nodemedia

@@ -0,0 +1,149 @@
+#!/usr/bin/python
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2018 Lenovo
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import optparse
+import os
+import signal
+import sys
+import time
+
+try:
+    signal.signal(signal.SIGPIPE, signal.SIG_DFL)
+except AttributeError:
+    pass
+path = os.path.dirname(os.path.realpath(__file__))
+path = os.path.realpath(os.path.join(path, '..', 'lib', 'python'))
+if path.startswith('/opt'):
+    sys.path.append(path)
+
+import confluent.client as client
+import confluent.screensqueeze as sq
+
+exitcode = 0
+
+def printerror(res, node=None):
+    global exitcode
+    if 'errorcode' in res:
+        exitcode = res['errorcode']
+    if 'error' in res:
+        if node:
+            sys.stderr.write('{0}: {1}\n'.format(node, res['error']))
+        else:
+            sys.stderr.write('{0}\n'.format(res['error']))
+        if 'errorcode' not in res:
+            exitcode = 1
+
+def attach_media(noderange, media):
+    global exitcode
+    session = client.Command()
+    resource = '/noderange/{0}/media/attach'.format(noderange)
+    print(repr(list(session.update(resource, {'url': media}))))
+
+
+def list_media(noderange, media):
+    session = client.Command()
+    resource = '/noderange/{0}/media/current'.format(noderange)
+    for res in session.read(resource):
+        printerror(res)
+        for node in res.get('databynode', []):
+            url = res['databynode'][node]['url']
+            name =  res['databynode'][node]['name']
+            print('{0}: {1}'.format(node, url if url else name))
+
+
+def detach_media(noderange, media):
+    global exitcode
+    session = client.Command()
+    resource = '/noderange/{0}/media/detach'.format(noderange)
+    for res in session.update(resource, {'detach': media}):
+        printerror(res)
+
+
+def upload_media(noderange, media):
+    global exitcode
+    session = client.Command()
+    output = sq.ScreenPrinter(noderange, session)
+    filename = os.path.abspath(media)
+    resource = '/noderange/{0}/media/uploads/'.format(noderange)
+    upargs = {'filename': filename}
+    noderrs = {}
+    nodeurls = {}
+    for res in session.create(resource, upargs):
+        if 'created' not in res:
+            for nodename in res.get('databynode', ()):
+                output.set_output(nodename, 'error!')
+                noderrs[nodename] = res['databynode'][nodename].get(
+                    'error', 'Unknown Error')
+            continue
+        watchurl = res['created']
+        currnode = watchurl.split('/')[1]
+        nodeurls[currnode] = '/' + watchurl
+    while nodeurls:
+        for node in list(nodeurls):
+            progress, status, err = get_update_progress(
+                session, nodeurls[node])
+            if status == 'error':
+                exitcode = 1
+                noderrs[node] = err
+            if status in ('error', 'complete', 'pending'):
+                list(session.delete(nodeurls[node]))
+                del nodeurls[node]
+            output.set_output(node, progress)
+        time.sleep(2)
+    allerrnodes = ','.join(noderrs)
+    if noderrs:
+        sys.stderr.write(
+            'Nodes had errors receiving media ({0})!\n'.format(allerrnodes))
+    for node in noderrs:
+        sys.stderr.write('{0}: {1}\n'.format(node, noderrs[node]))
+
+funmap = {
+    'upload': upload_media,
+    'attach': attach_media,
+    'detach': detach_media,
+    'list': list_media,
+}
+
+
+def main():
+    argparser = optparse.OptionParser(
+        usage="Usage: %prog <noderange> [list|upload|attach|detach] "
+              "<filename>|all|<url>",
+        epilog='upload will take the specified file and upload it to the BMC, '
+               'attach will instruct the BMC to connect a remote media to the '
+               'specified url, and detach all will remove all uploaded and'
+               'attached urls from the BMC, list shows currently mounted '
+               'media.')
+    (options, args) = argparser.parse_args()
+    media = None
+    try:
+        noderange = args[0]
+        operation = args[1]
+        if operation != 'list':
+            media = args[2]
+    except IndexError:
+        argparser.print_help()
+        sys.exit(1)
+    client.check_globbing(noderange)
+    try:
+        handler = funmap[operation]
+    except KeyError:
+        argparser.print_help()
+        sys.exit(1)
+    handler(noderange, media)
+if __name__ == '__main__':
+    main()