1 files changed, 77 insertions, 0 deletions
diff --git a/ui.py b/ui.py
new file mode 100644
index 0000000..2d63c06
--- /dev/null
+++ b/ui.py
@@ -0,0 +1,77 @@
+from datetime import datetime
+
+
+def print_header(title: str) -> None:
+    print(f"\n--- {title} ---\n")
+
+
+def print_table(headers: list[str], rows: list[list[str]]) -> None:
+    if not rows:
+        print("  (empty)")
+        return
+    all_rows = [headers] + [[str(c) for c in row] for row in rows]
+    widths = [max(len(r[i]) for r in all_rows) for i in range(len(headers))]
+    fmt = " | ".join(f"{{:<{w}}}" for w in widths)
+    print(fmt.format(*headers))
+    print("-+-".join("-" * w for w in widths))
+    for row in all_rows[1:]:
+        print(fmt.format(*row))
+
+
+def prompt_int(
+    prompt: str,
+    required: bool = True,
+    min_val: int | None = None,
+    max_val: int | None = None,
+) -> int | None:
+    while True:
+        val = input(prompt).strip()
+        if not val:
+            if not required:
+                return None
+            print("This field is required.")
+            continue
+        try:
+            n = int(val)
+        except ValueError:
+            print("Please enter a valid integer.")
+            continue
+        if min_val is not None and n < min_val:
+            print(f"Must be at least {min_val}.")
+            continue
+        if max_val is not None and n > max_val:
+            print(f"Must be at most {max_val}.")
+            continue
+        return n
+
+
+def prompt_str(prompt: str, required: bool = True) -> str | None:
+    while True:
+        val = input(prompt).strip()
+        if not val:
+            if not required:
+                return None
+            print("This field is required.")
+            continue
+        return val
+
+
+def prompt_datetime(prompt: str, default_now: bool = True) -> str:
+    while True:
+        default = datetime.now().strftime("%Y-%m-%d %H")
+        val = input(f"{prompt} [{default}]: ").strip()
+        if not val:
+            if default_now:
+                return default
+        else:
+            try:
+                datetime.strptime(val, "%Y-%m-%d %H")
+                return val
+            except ValueError:
+                print("Invalid format. Use YYYY-MM-DD HH.")
+                continue
+
+
+def confirm(prompt: str) -> bool:
+    val = input(f"{prompt} [y/N]: ").strip().lower()
+    return val == "y"