Add --delete for interactive removal of entries (#698)

* Add --delete for interactive removal of entries
* Add inquirer dependency for fancy prompting
* Fix some minor style issues
* Fix #434 
* Use PyInquirer instead of inquirer for Windows compatibility
* Add WIP (broken) test
* Change deletion interface to be more basic
* Update environment.py

Co-authored-by: Jonathan Wren <jonathan@nowandwren.com>

features/core.feature

@@ -93,3 +93,17 @@ Feature: Basic reading and writing to a journal
         2013-06-10 15:40 Life is good.
         """
         And we should get no error
+
+    # The input for this test is <SPACE><ENTER>y
+    Scenario: --delete flag allows deletion of single entry
+        Given we use the config "deletion.yaml"
+        When we run "jrnl --delete"
+        And we type " "
+        And we type
+            """
+
+            y
+            """
+        When we run "jrnl -on 2019-10-29 -s"
+        Then the output should not contain "2019-10-29 11:11 First entry."
+

features/data/configs/deletion.yaml

@@ -0,0 +1,12 @@
+default_hour: 9
+default_minute: 0
+editor: ""
+encrypt: false
+highlight: true
+journals:
+  default: features/journals/deletion.journal
+linewrap: 80
+tagsymbols: "@"
+template: false
+timeformat: "%Y-%m-%d %H:%M"
+indent_character: "|"

features/data/journals/deletion.journal

@@ -0,0 +1,5 @@
+[2019-10-29 11:11] First entry.
+
+[2019-10-29 11:11] Second entry.
+
+[2019-10-29 11:13] Third entry.

jrnl/Journal.py

@@ -234,6 +234,17 @@ def filter(
 
         self.entries = result
 
+    def prompt_delete_entries(self):
+        """Prompts for deletion of entries in a journal."""
+        print("Confirm each entry you want to delete [N/y]:")
+        to_delete: List[Entry] = []
+        for entry in self.entries:
+            response = input("jrnl: Delete entry '{}'? ".format(entry.pprint(short=True)))
+            if response == "y":
+                to_delete.append(entry)
+
+        self.entries = [entry for entry in self.entries if entry not in to_delete]
+
     def new_entry(self, raw, date=None, sort=True):
         """Constructs a new entry from some raw text input.
         If a date is given, it will parse and use this, otherwise scan for a date in the input first."""

jrnl/cli.py

@@ -174,6 +174,13 @@ def parse_args(args=None):
         action="store_true",
     )
 
+    exporting.add_argument(
+        "--delete",
+        dest="delete",
+        action="store_true",
+        help="Opens an interactive interface for deleting entries.",
+    )
+
     # Handle '-123' as a shortcut for '-n 123'
     num = re.compile(r"^-(\d+)$")
     if args is None:
@@ -194,7 +201,7 @@ def guess_mode(args, config):
         args.decrypt is not False
         or args.encrypt is not False
         or args.export is not False
-        or any((args.short, args.tags, args.edit))
+        or any((args.short, args.tags, args.edit, args.delete))
     ):
         compose = False
         export = True
@@ -456,3 +463,7 @@ def run(manual_args=None):
         journal.entries += other_entries
         journal.sort()
         journal.write()
+
+    elif args.delete:
+        journal.prompt_delete_entries()
+        journal.write()