OOF design framework seed code

Issue-ID: OPTFRA-18
Change-Id: Ib44b06f7184cb49f90d5936edd82cba44068b1c8
Signed-off-by: Sastry Isukapalli <sastry@research.att.com>

6 files changed, 330 insertions, 0 deletions

diff --git a/utils/__init__.py b/utils/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/utils/__init__.py
diff --git a/utils/data_conversion.py b/utils/data_conversion.py
new file mode 100644
index 0000000..2f678fa
--- /dev/null
+++ b/utils/data_conversion.py
@@ -0,0 +1,62 @@
+# -------------------------------------------------------------------------
+#   Copyright (c) 2015-2017 AT&T Intellectual Property
+#
+#   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 itertools
+from collections import defaultdict
+
+from dateutil import tz
+from dateutil.parser import parse
+
+
+def tuples_to_multi_val_dict(kvw_tuples, colnums=(0, 1)):
+    """Given a list of k,v tuples, get a dictionary of the form k -> [v1,v2,...,vn]
+    :param kvw_tuples: list of k,v,w tuples (e.g. [(k1,v1,a1), (k2,v2,a2), (k1,v3,a3), (k1,v4,a4)]
+    :param colnums: column numbers
+    :return: a dict of str:set, something like {k1: {v1, v3, v4}, k2: {v2}} or {k1: {a1, a3, a4}, k2: {a2}}
+    """
+    res = defaultdict(set)
+    for x in kvw_tuples:
+        key, val = x[colnums[0]], x[colnums[1]]
+        res[key].add(val)
+    return dict((k, set(v)) for k, v in res.items())
+
+
+def tuples_to_dict(kvw_tuples, colnums=(0, 1)):
+    """Given a list of k,v tuples, get a dictionary of the form k -> v
+    :param kvw_tuples: list of k,v,w tuples (e.g. [(k1,v1,a1), (k2,v2,a2), (k3,v3,a3), (k1,v4,a4)]
+    :param colnums: column numbers
+    :return: a dict; something like {k1: v4, k2: v2, k3: v3} (note, k1 is repeated, so last val is retained)
+    """
+    return dict((x[colnums[0]], x[colnums[1]]) for x in kvw_tuples)
+
+
+def utc_time_from_ts(timestamp):
+    """Return corresponding UTC timestamp for a given ISO timestamp (or anything that parse accepts)"""
+    return parse(timestamp).astimezone(tz.tzutc()).strftime('%Y-%m-%d %H:%M:%S')
+
+
+def list_flatten(l):
+    """Flatten a complex nested list of nested lists into a flat list"""
+    return itertools.chain(*[list_flatten(j) if isinstance(j, list) else [j] for j in l])
+
+
+text_to_symbol = {
+    'greater': ">",
+    'less': "<",
+    'equal': "="
+}
diff --git a/utils/data_types.py b/utils/data_types.py
new file mode 100644
index 0000000..877d4a1
--- /dev/null
+++ b/utils/data_types.py
@@ -0,0 +1,30 @@
+# -------------------------------------------------------------------------
+#   Copyright (c) 2015-2017 AT&T Intellectual Property
+#
+#   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 collections
+
+
+def list_like(obj):
+    """Check if an object is a list-like object, but not a string or dict"""
+    return isinstance(obj, collections.Sequence) and not isinstance(obj, (str, bytes))
+
+
+def dict_like(obj):
+    """Check if an object is a list-like object, but not a string or dict"""
+    return isinstance(obj, collections.Mapping)
+
diff --git a/utils/interfaces.py b/utils/interfaces.py
new file mode 100644
index 0000000..7a0e3a9
--- /dev/null
+++ b/utils/interfaces.py
@@ -0,0 +1,90 @@
+# -------------------------------------------------------------------------
+#   Copyright (c) 2015-2017 AT&T Intellectual Property
+#
+#   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 requests
+
+from osdf.config.base import osdf_config, creds_prefixes
+from osdf.logging.osdf_logging import MH, debug_log
+
+
+def get_rest_client(request_json, service):
+    """Get a RestClient based on request_json's callback URL and osdf_config's credentials based on service name
+    :param request_json:
+    :param service: so or cm
+    :return: rc -- RestClient
+    """
+    callback_url = request_json["requestInfo"]["callbackUrl"]
+    prefix = creds_prefixes[service]
+    config = osdf_config.deployment
+    c_userid, c_passwd = config[prefix + "Username"], config[prefix + "Password"]
+    return RestClient(url=callback_url, userid=c_userid, passwd=c_passwd)
+
+
+class RestClient(object):
+    """Simple REST Client that supports get/post and basic auth"""
+
+    def __init__(self, userid=None, passwd=None, log_func=None, url=None, timeout=None, headers=None,
+                 method="POST", req_id=None):
+        self.auth = (userid, passwd) if userid and passwd else None
+        self.headers = headers if headers else {}
+        self.method = method
+        self.url = url
+        self.log_func = log_func
+        self.timeout = (30, 90) if timeout is None else timeout
+        self.req_id = req_id
+
+    def add_headers(self, headers):
+        self.headers.update(headers)
+
+    def request(self, url=None, method=None, asjson=True, ok_codes=(2, ),
+                raw_response=False, noresponse=False, timeout=None, **kwargs):
+        """
+        :param url: REST end point to query
+        :param method: GET or POST (default is None => self.method)
+        :param asjson: whether the expected response is in json format
+        :param ok_codes: expected codes (prefix matching -- e.g. can be (20, 21, 32) or (2, 3))
+        :param noresponse: If no response is expected (as long as response codes are OK)
+        :param raw_response: If we need just the raw response (e.g. conductor sends transaction IDs in headers)
+        :param timeout: Connection and read timeouts
+        :param kwargs: Other parameters
+        :return:
+        """
+        if not self.req_id:
+            debug_log.debug("Requesting URL: {}".format(url or self.url))
+        else:
+            debug_log.debug("Requesting URL: {} for request ID: {}".format(url or self.url, self.req_id))
+
+        res = requests.request(url=url or self.url, method=method or self.method,
+                               auth=self.auth, headers=self.headers,
+                               timeout=timeout or self.timeout, **kwargs)
+
+        if self.log_func:
+            self.log_func(MH.received_http_response(res))
+
+        res_code = str(res.status_code)
+        if not any(res_code.startswith(x) for x in map(str, ok_codes)):
+            raise res.raise_for_status()
+
+        if raw_response:
+            return res
+        elif noresponse:
+            return None
+        elif asjson:
+            return res.json()
+        else:
+            return res.content
diff --git a/utils/local_processing.py b/utils/local_processing.py
new file mode 100644
index 0000000..6768839
--- /dev/null
+++ b/utils/local_processing.py
@@ -0,0 +1,43 @@
+# -------------------------------------------------------------------------
+#   Copyright (c) 2015-2017 AT&T Intellectual Property
+#
+#   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 os
+
+from osdf.logging.osdf_logging import metrics_log, MH, warn_audit_error
+
+
+def local_create_job_file(req_id, json_req, fname='osdf-req-data.json'):
+    """Creates a "work" folder for local processing and place relevant
+    job task file in there"""
+
+    work_dir = 'osdf-optim/work/' + req_id
+    work_file = '{}/{}'.format(work_dir, fname)
+    try:
+        cur_task = "Making a local directory in the OSDF manager for req-id: {}".format(req_id)
+        metrics_log.info(MH.creating_local_env(cur_task))
+        os.makedirs(work_dir, exist_ok=True)
+    except Exception as err:
+        warn_audit_error(MH.error_local_env(req_id, "Can't create directory {}".format(work_dir), err))
+        return None
+    try:
+        with open(work_file, 'w') as fid:
+            fid.write(json_req['payload'])
+        return work_dir
+    except Exception as err:
+        warn_audit_error(MH.error_local_env(req_id, "can't create file {}".format(work_file), err))
+        return None
diff --git a/utils/programming_utils.py b/utils/programming_utils.py
new file mode 100644
index 0000000..a0a8fde
--- /dev/null
+++ b/utils/programming_utils.py
@@ -0,0 +1,105 @@
+# -------------------------------------------------------------------------
+#   Copyright (c) 2015-2017 AT&T Intellectual Property
+#
+#   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 collections
+import itertools
+
+
+class DotDict(dict):
+    """A dot-dict mixin to be able to access a dictionary via dot notation
+    source: https://stackoverflow.com/questions/2352181/how-to-use-a-dot-to-access-members-of-dictionary
+    """
+    __getattr__ = dict.get
+    __setattr__ = dict.__setitem__
+    __delattr__ = dict.__delitem__
+
+
+class MetaSingleton(type):
+    """Singleton class (2nd Chapter) from Learning Python Design Patterns - 2nd ed.
+    Chetan Giridhar, Packt Publ. 2016"""
+    _instances = {}
+
+    def __call__(cls, *args, **kwargs):
+        if cls not in cls._instances:
+            cls._instances[cls] = super(MetaSingleton, cls).__call__(*args, **kwargs)
+        return cls._instances[cls]
+
+
+def namedtuple_with_defaults(typename, field_names, default_values=()):
+    """A namedtuple with default values -- Stack overflow recipe from Mark Lodato
+    http://stackoverflow.com/questions/11351032/named-tuple-and-optional-keyword-arguments
+    :param typename: Name for the class (same as for namedtuple)
+    :param field_names: Field names (same as for namedtuple)
+    :param default_values: Can be specified as a dictionary or as a list
+    :return: New namedtuple object
+    """
+    T = collections.namedtuple(typename, field_names)
+    T.__new__.__defaults__ = (None,) * len(T._fields)
+    if isinstance(default_values, collections.Mapping):
+        prototype = T(**default_values)
+    else:
+        prototype = T(*default_values)
+    T.__new__.__defaults__ = tuple(prototype)
+    return T
+
+
+def dot_notation(dict_like, dot_spec):
+    """Return the value corresponding to the dot_spec from a dict_like object
+    :param dict_like: dictionary, JSON, etc.
+    :param dot_spec: a dot notation (e.g. a1.b1.c1.d1 => a1["b1"]["c1"]["d1"])
+    :return: the value referenced by the dot_spec
+    """
+    attrs = dot_spec.split(".")  # we split the path
+    parent = dict_like.get(attrs[0])
+    children = ".".join(attrs[1:])
+    if not (parent and children):  # if no children or no parent, bail out
+        return parent
+    if isinstance(parent, list):  # here, we apply remaining path spec to all children
+        return [dot_notation(j, children) for j in parent]
+    elif isinstance(parent, dict):
+        return dot_notation(parent, children)
+    else:
+        return None
+
+
+def list_flatten(l):
+    """
+    Flatten a complex nested list of nested lists into a flat list (DFS).
+    For example, [ [1, 2], [[[2,3,4], [2,3,4]], [3,4,5, 'hello']]]
+    will produce [1, 2, 2, 3, 4, 2, 3, 4, 3, 4, 5, 'hello']
+    """
+    return list(itertools.chain(*[list_flatten(j) if isinstance(j, list) else [j] for j in l]))
+
+
+def inverted_dict(keys: list, key_val_dict: dict) -> dict:
+    """
+    Get val -> [keys] mapping for the given keys using key_val_dict
+    :param keys: the keys we are interested in (a list)
+    :param key_val_dict: the key -> val mapping
+    :return: inverted dictionary of val -> [keys] (for the subset dict of given keys)
+    """
+    res = {}
+    all_tuples = ((k, key_val_dict[k] if k in key_val_dict else 'no-parent-' + k) for k in keys)
+    for k, v in all_tuples:
+        if v in res:
+            res[v].append(k)
+        else:
+            res[v] = [k]
+    # making sure to remove duplicate keys
+    res = dict((v, list(set(k_list))) for v, k_list in res.items())
+    return res