Add basic cli

- resolves #7

Pipfile

@@ -6,6 +6,8 @@ name = "pypi"
 [packages]
 requests = "*"
 pyquery = "*"
+halo = "*"
+click = "*"
 
 [dev-packages]
 black = "*"

cryptocmd/__init__.py

@@ -1,2 +1,3 @@
 from .core import *
 from .__version__ import __version__
+from .cli import cli

cryptocmd/cli.py

@@ -0,0 +1,61 @@
+import click
+from cryptocmd import CmcScraper, __version__
+from datetime import datetime
+from halo import Halo
+from cryptocmd.utils import InvalidCoinCode
+
+
+def validate_date(ctx, param, value):
+    if value is None:
+        return value
+    try:
+        datetime.strptime(value, "%d-%m-%Y")
+    except ValueError:
+        raise click.BadParameter("Incorrect date format, should be like: dd-mm-YYYY.")
+    return value
+
+
+spinner = Halo(spinner="dots")
+
+
+@click.command()
+@click.argument("coin_code")
+@click.option("--start_date", "-s", callback=validate_date, help="Start date of data.")
+@click.option("--end_date", "-e", callback=validate_date, help="End date of data.")
+@click.option("--csv_name", "-n", help="Name of csv.")
+@click.option(
+    "--csv_path",
+    "-p",
+    default=".",
+    type=click.Path(exists=True),
+    help="Path to store csv.",
+)
+@click.version_option(
+    __version__, "--version", "-v", prog_name=click.style("cryptocmd", fg="green")
+)
+def cli(coin_code, start_date, end_date, csv_name, csv_path):
+    """Cryptocurrency historical market price data scraper 🐍.\n
+        Basic usage:\n
+        >>> cryptocmd BTC -s 1-1-2017 -e 1-10-2018
+    """
+
+    # verify start date is less than equal to end date
+    if start_date and end_date:
+        if start_date.split("-")[::-1] > end_date.split("-")[::-1]:
+            raise click.BadParameter(
+                "start_date cannot be greater than end_date.",
+                param_hint=["--start_date", "--end_date"],
+            )
+
+    try:
+        cmcs = CmcScraper(coin_code, start_date=start_date, end_date=end_date)
+        spinner.start("Downloading data of {} coin 📊".format(coin_code.upper()))
+        cmcs.get_data()
+        spinner.succeed("Downloaded data of {} coin 📊".format(coin_code.upper()))
+        spinner.start("Exporting data to CSV file 📄")
+        cmcs.export_csv(csv_name, csv_path)
+        spinner.succeed("Exported data to CSV file 📄\n🍰 ✨".encode("utf-8"))
+    except InvalidCoinCode:
+        spinner.fail("Invalid Coin Code")
+    except (KeyboardInterrupt, SystemExit):
+        spinner.stop_and_persist(symbol="🍰".encode("utf-8"), text="bye.")

setup.py

@@ -64,6 +64,7 @@ def run(self):
     author=AUTHOR,
     url=URL,
     packages=find_packages(exclude=("tests",)),
+    entry_points={"console_scripts": ["cryptocmd = cryptocmd.cli:cli"]},
     install_requires=["requests", "pyquery"],
     include_package_data=True,
     extras_require={"pandas": ["pandas"]},