prompt: add basic API for adding promptsprompt-api

Fixes #1836 (Add an API for adding new prompts)

3 files changed, 8 insertions, 17 deletions

diff --git a/lib/pry/commands/change_prompt.rb b/lib/pry/commands/change_prompt.rb
index 13d36cbb..f20b741a 100644
--- a/lib/pry/commands/change_prompt.rb
+++ b/lib/pry/commands/change_prompt.rb
@@ -11,16 +11,12 @@ class Pry::Command::ChangePrompt < Pry::ClassCommand
   BANNER
 
   def process(prompt)
-    if prompt_map.key?(prompt)
-      _pry_.prompt = prompt_map[prompt][:value]
+    if Pry::Prompt.all.key?(prompt)
+      _pry_.prompt = Pry::Prompt.all[prompt][:value]
     else
       raise Pry::CommandError, "'#{prompt}' isn't a known prompt!"
     end
   end
 
-private
-  def prompt_map
-    Pry::Prompt::MAP
-  end
   Pry::Commands.add_command(self)
 end
diff --git a/lib/pry/commands/list_prompts.rb b/lib/pry/commands/list_prompts.rb
index c257de7f..9fe2cad3 100644
--- a/lib/pry/commands/list_prompts.rb
+++ b/lib/pry/commands/list_prompts.rb
@@ -11,7 +11,7 @@ class Pry::Command::ListPrompts < Pry::ClassCommand
 
   def process
     output.puts heading("Available prompts") + "\n"
-    prompt_map.each do |name, prompt|
+    Pry::Prompt.all.each do |name, prompt|
       output.write "Name: #{bold(name)}"
       output.puts selected_prompt?(prompt) ? selected_text : ""
       output.puts prompt[:description]
@@ -19,10 +19,7 @@ class Pry::Command::ListPrompts < Pry::ClassCommand
     end
   end
 
-private
-  def prompt_map
-    Pry::Prompt::MAP
-  end
+  private
 
   def selected_text
     red " (selected) "
diff --git a/lib/pry/commands/shell_mode.rb b/lib/pry/commands/shell_mode.rb
index 0e5fd0bd..429da7ad 100644
--- a/lib/pry/commands/shell_mode.rb
+++ b/lib/pry/commands/shell_mode.rb
@@ -9,13 +9,11 @@ class Pry
     BANNER
 
     def process
-      case _pry_.prompt
-      when Pry::Prompt::SHELL
-        _pry_.pop_prompt
-        _pry_.custom_completions = _pry_.config.file_completions
+      if state.disabled ^= true
+        state.prev_prompt = _pry_.prompt
+        _pry_.prompt = Pry::Prompt[:shell][:value]
       else
-        _pry_.push_prompt Pry::Prompt::SHELL
-        _pry_.custom_completions = _pry_.config.command_completions
+        _pry_.prompt = state.prev_prompt
       end
     end
   end