Add analyzer to count occurrences of the given phrase

This currently prints a message to stdout for now, but we will probably
switch to printing a dataframe in the future (with ica.output_results).

Author: caleb531

ica/analyzers/count_phrase.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+
+import re
+
+import ica
+
+
+def main() -> None:
+
+    cli_args = ica.get_cli_args()
+    phrase = cli_args.args[0]
+    if not phrase:
+        raise Exception("Phrase to count must be provided")
+    dfs = ica.get_dataframes(
+        contact_name=cli_args.contact_name, timezone=cli_args.timezone
+    )
+    filtered_messages = dfs.messages[~dfs.messages["is_reaction"]]
+    count = (
+        filtered_messages["text"]
+        .str.findall(phrase, flags=re.IGNORECASE)
+        .str.len()
+        .sum()
+    )
+    print(f"The phrase '{phrase}' appears {count} times.")
+
+
+if __name__ == "__main__":
+    main()

ica/cli.py

@@ -64,6 +64,11 @@ def get_cli_args() -> argparse.Namespace:
         help="the path of the file to export analyzer results to; required when"
         " exporting Excel (xlsx) files",
     )
+    parser.add_argument(
+        "args",
+        nargs="*",
+        help="any additional arguments you want to pass to the analyzer",
+    )
 
     return parser.parse_args()