1 files changed, 54 insertions, 0 deletions
diff --git a/mycli/packages/prompt_utils.py b/mycli/packages/prompt_utils.py
new file mode 100644
index 0000000..fb1e431
--- /dev/null
+++ b/mycli/packages/prompt_utils.py
@@ -0,0 +1,54 @@
+import sys
+import click
+from .parseutils import is_destructive
+
+
+class ConfirmBoolParamType(click.ParamType):
+    name = 'confirmation'
+
+    def convert(self, value, param, ctx):
+        if isinstance(value, bool):
+            return bool(value)
+        value = value.lower()
+        if value in ('yes', 'y'):
+            return True
+        elif value in ('no', 'n'):
+            return False
+        self.fail('%s is not a valid boolean' % value, param, ctx)
+
+    def __repr__(self):
+        return 'BOOL'
+
+
+BOOLEAN_TYPE = ConfirmBoolParamType()
+
+
+def confirm_destructive_query(queries):
+    """Check if the query is destructive and prompts the user to confirm.
+
+    Returns:
+    * None if the query is non-destructive or we can't prompt the user.
+    * True if the query is destructive and the user wants to proceed.
+    * False if the query is destructive and the user doesn't want to proceed.
+
+    """
+    prompt_text = ("You're about to run a destructive command.\n"
+                   "Do you want to proceed? (y/n)")
+    if is_destructive(queries) and sys.stdin.isatty():
+        return prompt(prompt_text, type=BOOLEAN_TYPE)
+
+
+def confirm(*args, **kwargs):
+    """Prompt for confirmation (yes/no) and handle any abort exceptions."""
+    try:
+        return click.confirm(*args, **kwargs)
+    except click.Abort:
+        return False
+
+
+def prompt(*args, **kwargs):
+    """Prompt the user for input and handle any abort exceptions."""
+    try:
+        return click.prompt(*args, **kwargs)
+    except click.Abort:
+        return False