Clean commit - added metadatat files to clean MAIN

.gitignore

@@ -1,3 +1,6 @@
+# System
+.DS_Store
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

config/config.ini

@@ -3,9 +3,12 @@ default_profile=ci
 
 [prod]
 pennsieve_profile_name=prod
+scicrunch_api_key=YOUR_KEY_HERE
 
 [dev]
 pennsieve_profile_name=test
+scicrunch_api_key=YOUR_KEY_HERE
 
 [ci]
 pennsieve_profile_name=ci
+scicrunch_api_key=YOUR_KEY_HERE

docs/examples_metadata.py

@@ -0,0 +1,80 @@
+# Set of example call to the metadata services within the SPARC client
+# Make sure to get an API key and add to your config/config.ini file
+# Add key to the scicrunch_api_key attribute
+# Instructions for getting an API key can be found at: https://fdilab.gitbook.io/api-handbook/sparc-k-core-api-overview/getting-started-with-sparc-apis
+
+import json
+from sparc.client import SparcClient
+
+client = SparcClient(connect=False, config_file='../config/config.ini')
+
+# Connect
+response = client.metadata.connect()
+
+if response == "https://scicrunch.org/api/1/elastic":
+    test_pass = True
+else:
+    test_pass = False
+
+print( str(test_pass) )
+
+# Get Info
+response = client.metadata.info()
+
+if response == "https://scicrunch.org/api/1/elastic":
+    test_pass = True
+else:
+    test_pass = False
+
+print( str(test_pass) )
+
+# ES list datasets
+response = {}
+response = client.metadata.list_datasets()
+
+check_response = response['hits']['total']
+if check_response > 200:
+    test_pass = True
+else:
+    test_pass = False
+
+print( str(test_pass) )
+
+# ES search via default
+response = {}
+response = client.metadata.search_datasets()
+
+check_response = response['hits']['total']
+if check_response > 200:
+    test_pass = True
+else:
+    test_pass = False
+
+print( str(test_pass) )
+
+# ES search via JSON string
+response = {}
+response = client.metadata.search_datasets("{\"query\": {\"terms\": {\"_id\": [ \"136\", \"95\" ] } } }")
+
+check_response = response['hits']['total']
+if check_response == 2:
+    test_pass = True
+else:
+    test_pass = False
+
+print( str(test_pass) )
+
+# ES search via JSON object
+response = {}
+body = "{\"query\": {\"terms\": {\"_id\": [ \"136\", \"95\" ] } } }"
+body_json = json.loads(body)
+
+response = client.metadata.search_datasets(body_json)
+
+check_response = response['hits']['total']
+if check_response == 2:
+    test_pass = True
+else:
+    test_pass = False
+
+print( str(test_pass) )

src/sparc/client/services/metadata.py

@@ -0,0 +1,281 @@
+import logging
+import json
+
+import requests
+from requests.adapters import HTTPAdapter, Retry
+
+from configparser import SectionProxy
+from typing import List, Optional, Union
+from ._default import ServiceBase
+
+
+class MetadataService(ServiceBase):
+    """A wrapper for the Elasticsearch Metadata library
+
+    Parameters:
+    -----------
+    config : dict
+        A configuration containing necessary API key (scicrunch_api_key).
+    connect : bool
+        Not needed with REST metadata services.
+
+    Attributes:
+    -----------
+    default_headers : dict
+        A dictionary with headers to make HTTP requests.
+    host_api : str
+        A default HTTP address of the SciCrunch Elasticsearch API endpoint.
+
+    Methods:
+    --------
+    get_profile() -> str
+        Returns the currently used API Key.
+    set_profile() -> str
+        Changes the API Key.
+    close() : None
+        Not needed with REST metadata services.
+    getURL(...) : dict
+        Supporting function to retrieve data from REST endpoint via GET
+        This support Elasticsearch URL based queries
+    postURL(...) : dict
+        Supporting function to retrieve data from REST endpoint
+        This supports Elasticsearch JSON queries
+    list_datasets(...) : dict
+        Returns a dictionary with datasets metadata.
+    search_datasets(...) : dict
+        Returns a dictionary with datasets matching search criteria.
+
+    """
+
+    default_headers = {
+        "Content-Type": "application/json",
+        "Accept": "application/json; charset=utf-8",
+    }
+
+    host_api = "https://scicrunch.org/api/1/elastic"
+
+    scicrunch_api_key: str = None
+    profile_name: str = None
+
+    def __init__(
+        self, config: Optional[Union[dict, SectionProxy]] = None, connect: bool = False
+    ) -> None:
+        logging.info("Initializing SPARC K-Core Elasticsearch services...")
+        logging.debug(str(config))
+
+        if config is not None:
+            self.scicrunch_api_key = config.get("scicrunch_api_key")
+            logging.info("SciCrunch API Key: Found")
+            self.profile_name = config.get("pennsieve_profile_name")
+            logging.info("Profile: " + self.profile_name)
+        else:
+            logging.warning("SciCrunch API Key: Not Found")
+            logging.info("Profile: none")
+        if connect:
+            self.connect()
+
+    def connect(self) -> str:
+        """ Not needed as metadata services are REST service calls """
+        logging.info("Metadata REST services available...")
+
+        self.host_api = "https://scicrunch.org/api/1/elastic"
+        return self.host_api
+
+    def info(self) -> str:
+        """Returns information about the metadata search services."""
+
+        self.host_api = "https://scicrunch.org/api/1/elastic"
+        return self.host_api
+
+    def get_profile(self) -> str:
+        """Returns currently used API key.
+
+        Returns:
+        --------
+        A string with API Key.
+        """
+        return self.scicrunch_api_key
+
+    def set_profile(self, api_key: str) -> str:
+        """Changes the API key to the specified name.
+
+        Parameters:
+        -----------
+        api_key : str
+            The API key to use.
+
+        Returns:
+        --------
+        A string with confirmation of API key switch.
+        """
+        self.scicrunch_api_key = api_key
+        return self.scicrunch_api_key
+
+    def close(self) -> None:
+        """Not needed as metadata services are REST service calls"""
+        return self.host_api
+
+#####################################################################
+# Supporting Functions
+
+#####################################################################
+# Function to GET content from URL with retries
+    def getURL(self, url, headers="NONE"):
+
+        result = "[ERROR]"
+        url_session = requests.Session()
+
+        retries = Retry(total=6,
+                        backoff_factor=1,
+                        status_forcelist=[403, 404, 413, 429, 500, 502, 503, 504])
+
+        url_session.mount('https://', HTTPAdapter(max_retries=retries))
+
+        success = 1
+
+        try:
+            if headers == "NONE":
+                url_result = url_session.get(url)
+            else:
+                url_result = url_session.get(url, headers=headers)
+
+            if url_result.status_code == 410:
+                logging.warning("Retrieval Status 410 - URL Unpublished:" + url)
+            else:
+                url_result.raise_for_status()
+
+        except requests.exceptions.HTTPError as errh:
+            logging.error("Retrieving URL - HTTP Error:", errh)
+            success = 0
+        except requests.exceptions.ConnectionError as errc:
+            logging.error("Retrieving URL - Error Connecting:", errc)
+            success = 0
+        except requests.exceptions.Timeout as errt:
+            logging.error("Retrieving URL - Timeout Error:", errt)
+            success = 0
+        except requests.exceptions.RequestException as err:
+            logging.error("Retrieving URL - Something Else", err)
+            success = 0
+
+        url_session.close()
+
+        if success == 1:
+            result = url_result
+        else:
+            result = {}
+
+        return result.json()
+
+
+#####################################################################
+# Function to retrieve content via POST from URL with retries
+    def postURL(self, url, body, headers="NONE"):
+
+        result = "[ERROR]"
+        url_session = requests.Session()
+
+        retries = Retry(total=6,
+                        backoff_factor=1,
+                        status_forcelist=[403, 404, 413, 429, 500, 502, 503, 504])
+
+        url_session.mount('https://', HTTPAdapter(max_retries=retries))
+
+        try:
+            if type(body) is dict:
+                body_json = body
+            else:
+                body_json = json.loads(body)
+        except:
+                logging.error("Elasticsearch query body can not be read")
+
+        success = 1
+
+        try:
+            if headers == "NONE":
+                url_result = url_session.post(url, json = body_json)
+            else:
+                url_result = url_session.post(url, json = body_json, headers=headers)
+
+            if url_result.status_code == 410:
+                logging.warning("Retrieval Status 410 - URL Unpublished:" + url)
+            else:
+                url_result.raise_for_status()
+
+        except requests.exceptions.HTTPError as errh:
+            logging.error("Retrieving URL - HTTP Error:", errh)
+            success = 0
+        except requests.exceptions.ConnectionError as errc:
+            logging.error("Retrieving URL - Error Connecting:", errc)
+            success = 0
+        except requests.exceptions.Timeout as errt:
+            logging.error("Retrieving URL - Timeout Error:", errt)
+            success = 0
+        except requests.exceptions.RequestException as err:
+            logging.error("Retrieving URL - Something Else", err)
+            success = 0
+
+        url_session.close()
+
+        if success == 1:
+            result = url_result
+        else:
+            result = {}
+
+        return result.json()
+
+
+#####################################################################
+# Metadata Search Functions
+
+    def list_datasets(
+        self,
+        limit: int = 10,
+        offset: int = 0
+    ) -> list:
+        """Lists datasets and associated metadata.
+
+        Parameters:
+        -----------
+        limit : int
+            Max number of datasets returned.
+        offset : int
+            Offset used for pagination of results.
+
+        Returns:
+        --------
+        A json with the results.
+
+        """
+        self.host_api = "https://scicrunch.org/api/1/elastic/SPARC_Algolia_pr/_search"
+
+        list_url = self.host_api + "?" + "from=" + str(offset) + "&size=" + str(limit) + "&key=" + self.scicrunch_api_key
+
+        list_results = self.getURL(list_url, headers=self.default_headers)
+        return list_results
+
+
+    def search_datasets(
+        self,
+        query: str = "{\"query\": { \"match_all\": {}}}"
+    ) -> list:
+        """Gets datasets matching specified query. 
+
+        This function provides 
+
+        Parameters:
+        -----------
+        query : str
+            Elasticsearch JSON query.
+
+        Returns:
+        --------
+        A json with the results.
+
+        """
+
+        self.host_api = "https://scicrunch.org/api/1/elastic/SPARC_Algolia_pr/_search"
+
+        list_url = self.host_api + "?" + "key=" + self.scicrunch_api_key
+
+        list_results = self.postURL(list_url, body = query, headers=self.default_headers)
+        return list_results