Add EarthdataCredentials block

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Added NASA Earthdata credentials block - [#4](https://github.com/giorgiobasile/prefect-eo/issues/4)
+
 ### Changed
 
 ### Deprecated

README.md

@@ -47,7 +47,7 @@ Install `prefect-eo` with `pip`:
 pip install prefect-eo
 ```
 
-Requires an installation of Python 3.7+.
+Requires an installation of Python 3.8+.
 
 We recommend using a Python virtual environment manager such as pipenv, conda or virtualenv.
 

docs/flows.md → docs/earthdata.md

@@ -3,4 +3,4 @@ description:
 notes: This documentation page is generated from source file docstrings.
 ---
 
-::: prefect_eo.flows
+::: prefect_eo.earthdata

mkdocs.yml

@@ -76,7 +76,7 @@ nav:
     - Blocks Catalog: blocks_catalog.md
     - Examples Catalog: examples_catalog.md
     - API Reference:
-        - Tasks: tasks.md
-        - Flows: flows.md
+      - Earthdata: earthdata.md
+
 
 

prefect_eo/__init__.py

@@ -1,4 +1,4 @@
 from . import _version
-from .blocks import EoBlock  # noqa
+from .earthdata import EarthdataCredentials  # noqa
 
 __version__ = _version.get_versions()["version"]

prefect_eo/earthdata.py

@@ -0,0 +1,59 @@
+"""Module handling NASA Earthdata credentials"""
+
+import os
+
+import earthaccess
+from prefect.blocks.core import Block
+from pydantic import Field, SecretStr
+
+
+class EarthdataCredentials(Block):
+    """
+    Block used to manage authentication with NASA Earthdata.
+    NASA Earthdata authentication is handled via the `earthaccess` module.
+    Refer to the [earthaccess docs](https://nsidc.github.io/earthaccess/)
+    for more info about the possible credential configurations.
+
+    Example:
+        Load stored Earthdata credentials:
+        ```python
+        from prefect_eo import EarthdataCredentials
+
+        ed_credentials_block = EarthdataCredentials.load("BLOCK_NAME")
+        ```
+    """  # noqa E501
+
+    _logo_url = "https://yt3.googleusercontent.com/ytc/AGIKgqPjIUeAw3_hrkHWZgixdwD5jc-hTWweoCA6bJMhUg=s176-c-k-c0x00ffffff-no-rj"  # noqa
+    _block_type_name = "NASA Earthdata Credentials"
+    _documentation_url = "https://nsidc.github.io/earthaccess/"  # noqa
+
+    earthdata_username: str = Field(
+        default=...,
+        description="The Earthdata username of a specific account.",
+        title="Earthdata username",
+    )
+    earthdata_password: SecretStr = Field(
+        default=...,
+        description="The Earthdata password of a specific account.",
+        title="Earthdata password",
+    )
+
+    def login(self) -> earthaccess.Auth:
+        """
+        Returns an authenticated session with NASA Earthdata
+
+        Example:
+            ```python
+            earthdata_credentials_block = EarthdataCredentials(
+                earthdata_username = "username",
+                earthdata_password = "password"
+            )
+            earthdata_auth = earthdata_credentials_block.login()
+            ```
+        """
+
+        """"""
+
+        os.environ["EARTHDATA_USERNAME"] = self.earthdata_username
+        os.environ["EARTHDATA_PASSWORD"] = self.earthdata_password.get_secret_value()
+        return earthaccess.login(strategy="environment")

requirements-dev.txt

@@ -8,8 +8,8 @@ mkdocstrings[python]
 isort
 pre-commit
 pytest-asyncio
-mock; python_version < '3.8'
 mkdocs-gen-files
 interrogate
 coverage
 pillow
+requests_mock

requirements.txt

@@ -1 +1,2 @@
 prefect>=2.0.0
+earthaccess

setup.py

@@ -24,7 +24,7 @@
     version=versioneer.get_version(),
     cmdclass=versioneer.get_cmdclass(),
     packages=find_packages(exclude=("tests", "docs")),
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     install_requires=install_requires,
     extras_require={"dev": dev_requires},
     entry_points={
@@ -38,7 +38,6 @@
         "Intended Audience :: System Administrators",
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",

tests/test_earthdata.py

@@ -0,0 +1,50 @@
+import pytest
+import requests_mock
+from earthaccess import Auth
+
+from prefect_eo.earthdata import EarthdataCredentials
+
+
+@pytest.fixture
+def mock_earthdata_responses():
+    with requests_mock.Mocker() as m:
+        json_response = [
+            {"access_token": "EDL-token-1", "expiration_date": "12/15/2023"},
+            {"access_token": "EDL-token-2", "expiration_date": "12/16/2023"},
+        ]
+        m.get(
+            "https://urs.earthdata.nasa.gov/api/users/tokens",
+            json=json_response,
+            status_code=200,
+        )
+        m.get(
+            "https://urs.earthdata.nasa.gov/profile",
+            json={"uid": "test_username"},
+            status_code=200,
+        )
+        m.get(
+            "https://urs.earthdata.nasa.gov/api/users/user?client_id=ntD0YGC_SM3Bjs-Tnxd7bg",  # noqa E501
+            json={"uid": "test_username"},
+            status_code=200,
+        )
+        yield m
+
+
+def test_earthdata_credentials_login(mock_earthdata_responses):  # noqa
+    """
+    Asserts that instantiated EarthdataCredentials block creates an
+    authenticated session.
+    """
+
+    # Set up mock user input
+    mock_username = "user"
+    mock_password = "password"
+
+    # Instantiate EarthdataCredentials block
+    earthdata_credentials_block = EarthdataCredentials(
+        earthdata_username=mock_username, earthdata_password=mock_password
+    )
+    earthdata_auth = earthdata_credentials_block.login()
+
+    assert isinstance(earthdata_auth, Auth)
+    assert earthdata_auth.authenticated