From ffdaf83784003724e049554b424ccaa416be9e19 Mon Sep 17 00:00:00 2001
From: "Harrison (Harry) Cramer"
 <32515581+harrisoncramer@users.noreply.github.com>
Date: Fri, 10 Nov 2023 17:38:28 -0500
Subject: [PATCH] BREAKING CHANGE: This is a breaking change, it deprecates the
 Delta Reviewer (#81)

BREAKING

This is a breaking change which deprecates support for the Delta reviewer. Now, only Diffview is supported.
---
 README.md                                     |  25 +-
 .../actions/assignees_and_reviewers.lua       |   4 +-
 lua/gitlab/actions/comment.lua                |  13 +-
 lua/gitlab/actions/discussions.lua            | 105 +++-----
 lua/gitlab/actions/miscellaneous.lua          |   8 +-
 lua/gitlab/actions/pipeline.lua               |  14 +-
 lua/gitlab/actions/summary.lua                |   2 +-
 lua/gitlab/async.lua                          |   3 +-
 lua/gitlab/init.lua                           |   7 +-
 lua/gitlab/job.lua                            |  11 +-
 lua/gitlab/reviewer/delta.lua                 | 254 ------------------
 lua/gitlab/reviewer/diffview.lua              |  22 +-
 lua/gitlab/reviewer/init.lua                  |   9 +-
 lua/gitlab/server.lua                         |  13 +-
 lua/gitlab/state.lua                          |  46 ++--
 lua/gitlab/utils/init.lua                     |  22 +-
 16 files changed, 127 insertions(+), 431 deletions(-)
 delete mode 100644 lua/gitlab/reviewer/delta.lua

diff --git a/README.md b/README.md
index 3ead4cb..245bfc0 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,6 @@ https://github.com/harrisoncramer/gitlab.nvim/assets/32515581/50f44eaf-5f99-4cb3
 ## Quick Start
 
 1. Install Go
-2. Install reviewer: <a href="https://github.com/dandavison/delta">delta</a> or <a href="https://github.com/sindrets/diffview.nvim">diffview</a>
 3. Add configuration (see Installation section)
 4. Checkout your feature branch: `git checkout feature-branch`
 5. Open Neovim
@@ -36,12 +35,13 @@ return {
   dependencies = {
     "MunifTanjim/nui.nvim",
     "nvim-lua/plenary.nvim",
+    "sindrets/diffview.nvim",
     "stevearc/dressing.nvim", -- Recommended but not required. Better UI for pickers.
     enabled = true,
   },
   build = function () require("gitlab.server").build(true) end, -- Builds the Go binary
   config = function()
-    require("gitlab").setup() -- Uses delta reviewer by default
+    require("gitlab").setup()
   end,
 }
 ```
@@ -54,6 +54,7 @@ use {
   requires = {
     "MunifTanjim/nui.nvim",
     "nvim-lua/plenary.nvim"
+    "sindrets/diffview.nvim",
   },
   run = function() require("gitlab.server").build(true) end,
   config = function()
@@ -87,7 +88,6 @@ require("gitlab").setup({
   port = nil, -- The port of the Go server, which runs in the background, if omitted or `nil` the port will be chosen automatically
   log_path = vim.fn.stdpath("cache") .. "/gitlab.nvim.log", -- Log path for the Go server
   debug = { go_request = false, go_response = false }, -- Which values to log
-  reviewer = "delta", -- The reviewer type ("delta" or "diffview")
   attachment_dir = nil, -- The local directory for files (see the "summary" section)
   popup = { -- The popup for comment creation, editing, and replying
     exit = "<Esc>",
@@ -109,19 +109,6 @@ require("gitlab").setup({
     resolved = '✓', -- Symbol to show next to resolved discussions
     unresolved = '✖', -- Symbol to show next to unresolved discussions
   },
-  review_pane = { -- Specific settings for different reviewers
-    delta = {
-      added_file = "", -- The symbol to show next to added files
-      modified_file = "", -- The symbol to show next to modified files
-      removed_file = "", -- The symbol to show next to removed files
-    }
-  },
-  dialogue = {  -- The confirmation dialogue for deleting comments
-    focus_next = { "j", "<Down>", "<Tab>" },
-    focus_prev = { "k", "<Up>", "<S-Tab>" },
-    close = { "<Esc>", "<C-c>" },
-    submit = { "<CR>", "<Space>" },
-  },
   pipeline = {
     created = "",
     pending = "",
@@ -170,14 +157,12 @@ The `review` action will open a diff of the changes. You can leave comments usin
 ```lua
 require("gitlab").review()
 require("gitlab").create_comment()
-require("gitlab").create_multiline_comment() -- Only supported for diffview reviewer
-require("gitlab").create_comment_suggestion() -- Only supported for diffview reviewer
+require("gitlab").create_multiline_comment()
+require("gitlab").create_comment_suggestion()
 ```
 
 For suggesting changes you can use `create_comment_suggestion` in visual mode which works similar to `create_multiline_comment` but prefills the comment window with gitlab [suggest changes](https://docs.gitlab.com/ee/user/project/merge_requests/reviews/suggestions.html) code block with prefilled code from visual selection.
 
-The reviewer is Delta by default, but you can configure the plugin to use Diffview instead.
-
 ### Discussions and Notes
 
 Gitlab groups threads of comments together into "discussions."
diff --git a/lua/gitlab/actions/assignees_and_reviewers.lua b/lua/gitlab/actions/assignees_and_reviewers.lua
index 2898cfc..8c99cbc 100644
--- a/lua/gitlab/actions/assignees_and_reviewers.lua
+++ b/lua/gitlab/actions/assignees_and_reviewers.lua
@@ -38,7 +38,7 @@ M.add_popup = function(type)
     table.insert(current_ids, choice.id)
     local body = { ids = current_ids }
     job.run_job("/mr/" .. type, "PUT", body, function(data)
-      vim.notify(data.message, vim.log.levels.INFO)
+      u.notify(data.message, vim.log.levels.INFO)
       state.INFO[plural] = data[plural]
     end)
   end)
@@ -59,7 +59,7 @@ M.delete_popup = function(type)
     local ids = u.extract(M.filter_eligible(current, { choice }), "id")
     local body = { ids = ids }
     job.run_job("/mr/" .. type, "PUT", body, function(data)
-      vim.notify(data.message, vim.log.levels.INFO)
+      u.notify(data.message, vim.log.levels.INFO)
       state.INFO[plural] = data[plural]
     end)
   end)
diff --git a/lua/gitlab/actions/comment.lua b/lua/gitlab/actions/comment.lua
index 2254926..8be3312 100644
--- a/lua/gitlab/actions/comment.lua
+++ b/lua/gitlab/actions/comment.lua
@@ -46,11 +46,6 @@ M.create_comment_suggestion = function()
   local backticks = "```"
   local selected_lines = reviewer.get_lines(start_line, end_line)
 
-  if selected_lines == nil then
-    -- TODO: remove when delta is supported
-    return
-  end
-
   for line in ipairs(selected_lines) do
     if string.match(line, "^```$") then
       backticks = "````"
@@ -65,7 +60,7 @@ M.create_comment_suggestion = function()
     suggestion_start = backticks .. "suggestion:-" .. range .. "+0"
   else
     -- This should never happen afaik
-    vim.notify("Unexpected suggestion position", vim.log.levels.ERROR)
+    u.notify("Unexpected suggestion position", vim.log.levels.ERROR)
     return
   end
   suggestion_start = suggestion_start
@@ -117,14 +112,14 @@ end
 ---@param unlinked boolean | nil if true, the comment is not linked to a line
 M.confirm_create_comment = function(text, range, unlinked)
   if text == nil then
-    vim.notify("Reviewer did not provide text of change", vim.log.levels.ERROR)
+    u.notify("Reviewer did not provide text of change", vim.log.levels.ERROR)
     return
   end
 
   if unlinked then
     local body = { comment = text }
     job.run_job("/comment", "POST", body, function(data)
-      vim.notify("Note created!", vim.log.levels.INFO)
+      u.notify("Note created!", vim.log.levels.INFO)
       discussions.add_discussion({ data = data, unlinked = true })
     end)
     return
@@ -149,7 +144,7 @@ M.confirm_create_comment = function(text, range, unlinked)
   }
 
   job.run_job("/comment", "POST", body, function(data)
-    vim.notify("Comment created!", vim.log.levels.INFO)
+    u.notify("Comment created!", vim.log.levels.INFO)
     discussions.add_discussion({ data = data, unlinked = false })
   end)
 end
diff --git a/lua/gitlab/actions/discussions.lua b/lua/gitlab/actions/discussions.lua
index f1245e9..e24ef90 100644
--- a/lua/gitlab/actions/discussions.lua
+++ b/lua/gitlab/actions/discussions.lua
@@ -3,7 +3,6 @@
 -- and marking discussions as resolved/unresolved.
 local Split = require("nui.split")
 local Popup = require("nui.popup")
-local Menu = require("nui.menu")
 local NuiTree = require("nui.tree")
 local Layout = require("nui.layout")
 local job = require("gitlab.job")
@@ -40,7 +39,7 @@ M.toggle = function()
 
   job.run_job("/discussions", "POST", { blacklist = state.settings.discussion_tree.blacklist }, function(data)
     if type(data.discussions) ~= "table" and type(data.unlinked_discussions) ~= "table" then
-      vim.notify("No discussions or notes for this MR", vim.log.levels.WARN)
+      u.notify("No discussions or notes for this MR", vim.log.levels.WARN)
       return
     end
 
@@ -86,7 +85,7 @@ M.send_reply = function(tree, discussion_id)
   return function(text)
     local body = { discussion_id = discussion_id, reply = text }
     job.run_job("/reply", "POST", body, function(data)
-      vim.notify("Sent reply!", vim.log.levels.INFO)
+      u.notify("Sent reply!", vim.log.levels.INFO)
       M.add_reply_to_tree(tree, data.note, discussion_id)
     end)
   end
@@ -94,74 +93,48 @@ end
 
 -- This function (settings.discussion_tree.delete_comment) will trigger a popup prompting you to delete the current comment
 M.delete_comment = function(tree, unlinked)
-  local menu = Menu({
-    position = "50%",
-    size = {
-      width = 25,
-    },
-    border = {
-      style = "single",
-      text = {
-        top = "Delete Comment?",
-        top_align = "center",
-      },
-    },
-    win_options = {
-      winhighlight = "Normal:Normal,FloatBorder:Normal",
-    },
-  }, {
-    lines = {
-      Menu.item("Confirm"),
-      Menu.item("Cancel"),
-    },
-    max_width = 20,
-    keymap = {
-      focus_next = state.settings.dialogue.focus_next,
-      focus_prev = state.settings.dialogue.focus_prev,
-      close = state.settings.dialogue.close,
-      submit = state.settings.dialogue.submit,
-    },
-    on_submit = function(item)
-      M.send_deletion(tree, item, unlinked)
-    end,
-  })
-  menu:mount()
+  vim.ui.select({ "Confirm", "Cancel" }, {
+    prompt = "Delete comment?",
+  }, function(choice)
+    if choice == "Cancel" then
+      return
+    end
+    M.send_deletion(tree, unlinked)
+  end)
 end
 
 -- This function will actually send the deletion to Gitlab
 -- when you make a selection, and re-render the tree
-M.send_deletion = function(tree, item, unlinked)
-  if item.text == "Confirm" then
-    local current_node = tree:get_node()
+M.send_deletion = function(tree, unlinked)
+  local current_node = tree:get_node()
 
-    local note_node = M.get_note_node(tree, current_node)
-    local root_node = M.get_root_node(tree, current_node)
-    local note_id = note_node.is_root and root_node.root_note_id or note_node.id
+  local note_node = M.get_note_node(tree, current_node)
+  local root_node = M.get_root_node(tree, current_node)
+  local note_id = note_node.is_root and root_node.root_note_id or note_node.id
 
-    local body = { discussion_id = root_node.id, note_id = note_id }
+  local body = { discussion_id = root_node.id, note_id = note_id }
 
-    job.run_job("/comment", "DELETE", body, function(data)
-      vim.notify(data.message, vim.log.levels.INFO)
-      if not note_node.is_root then
-        tree:remove_node("-" .. note_id) -- Note is not a discussion root, safe to remove
-        tree:render()
+  job.run_job("/comment", "DELETE", body, function(data)
+    u.notify(data.message, vim.log.levels.INFO)
+    if not note_node.is_root then
+      tree:remove_node("-" .. note_id) -- Note is not a discussion root, safe to remove
+      tree:render()
+    else
+      if unlinked then
+        M.unlinked_discussions = u.remove_first_value(M.unlinked_discussions)
+        M.rebuild_unlinked_discussion_tree()
       else
-        if unlinked then
-          M.unlinked_discussions = u.remove_first_value(M.unlinked_discussions)
-          M.rebuild_unlinked_discussion_tree()
-        else
-          M.discussions = u.remove_first_value(M.discussions)
-          M.rebuild_discussion_tree()
-        end
+        M.discussions = u.remove_first_value(M.discussions)
+        M.rebuild_discussion_tree()
       end
-      M.switch_can_edit_bufs(true)
-      M.add_empty_titles({
-        { M.linked_section_bufnr, M.discussions, "No Discussions for this MR" },
-        { M.unlinked_section_bufnr, M.unlinked_discussions, "No Notes (Unlinked Discussions) for this MR" },
-      })
-      M.switch_can_edit_bufs(false)
-    end)
-  end
+    end
+    M.switch_can_edit_bufs(true)
+    M.add_empty_titles({
+      { M.linked_section_bufnr, M.discussions, "No Discussions for this MR" },
+      { M.unlinked_section_bufnr, M.unlinked_discussions, "No Notes (Unlinked Discussions) for this MR" },
+    })
+    M.switch_can_edit_bufs(false)
+  end)
 end
 
 -- This function (settings.discussion_tree.edit_comment) will open the edit popup for the current comment in the discussion tree
@@ -199,7 +172,7 @@ M.send_edits = function(discussion_id, note_id, unlinked)
       comment = text,
     }
     job.run_job("/comment", "PATCH", body, function(data)
-      vim.notify(data.message, vim.log.levels.INFO)
+      u.notify(data.message, vim.log.levels.INFO)
       if unlinked then
         M.unlinked_discussions = M.replace_text(M.unlinked_discussions, discussion_id, note_id, text)
         M.rebuild_unlinked_discussion_tree()
@@ -225,7 +198,7 @@ M.toggle_resolved = function(tree)
   }
 
   job.run_job("/comment", "PATCH", body, function(data)
-    vim.notify(data.message, vim.log.levels.INFO)
+    u.notify(data.message, vim.log.levels.INFO)
     M.redraw_resolved_status(tree, note, not note.resolved)
   end)
 end
@@ -234,7 +207,7 @@ end
 M.jump_to_reviewer = function(tree)
   local file_name, new_line, old_line, error = M.get_note_location(tree)
   if error ~= nil then
-    vim.notify(error, vim.log.levels.ERROR)
+    u.notify(error, vim.log.levels.ERROR)
     return
   end
   reviewer.jump(file_name, new_line, old_line)
@@ -244,7 +217,7 @@ end
 M.jump_to_file = function(tree)
   local file_name, new_line, old_line, error = M.get_note_location(tree)
   if error ~= nil then
-    vim.notify(error, vim.log.levels.ERROR)
+    u.notify(error, vim.log.levels.ERROR)
     return
   end
   vim.cmd.tabnew()
diff --git a/lua/gitlab/actions/miscellaneous.lua b/lua/gitlab/actions/miscellaneous.lua
index faaf640..12208c9 100644
--- a/lua/gitlab/actions/miscellaneous.lua
+++ b/lua/gitlab/actions/miscellaneous.lua
@@ -6,7 +6,7 @@ local M = {}
 M.open_in_browser = function()
   local url = state.INFO.web_url
   if url == nil then
-    vim.notify("Could not get Gitlab URL", vim.log.levels.ERROR)
+    u.notify("Could not get Gitlab URL", vim.log.levels.ERROR)
     return
   end
   if vim.fn.has("mac") == 1 then
@@ -14,21 +14,21 @@ M.open_in_browser = function()
   elseif vim.fn.has("unix") == 1 then
     vim.fn.jobstart({ "xdg-open", url })
   else
-    vim.notify("Opening a Gitlab URL is not supported on this OS!", vim.log.levels.ERROR)
+    u.notify("Opening a Gitlab URL is not supported on this OS!", vim.log.levels.ERROR)
   end
 end
 
 M.attach_file = function()
   local attachment_dir = state.settings.attachment_dir
   if not attachment_dir or attachment_dir == "" then
-    vim.notify("Must provide valid attachment_dir in plugin setup", vim.log.levels.ERROR)
+    u.notify("Must provide valid attachment_dir in plugin setup", vim.log.levels.ERROR)
     return
   end
 
   local files = u.list_files_in_folder(attachment_dir)
 
   if files == nil then
-    vim.notify(string.format("Could not list files in %s", attachment_dir), vim.log.levels.ERROR)
+    u.notify(string.format("Could not list files in %s", attachment_dir), vim.log.levels.ERROR)
     return
   end
 
diff --git a/lua/gitlab/actions/pipeline.lua b/lua/gitlab/actions/pipeline.lua
index f6ab421..6ccce65 100644
--- a/lua/gitlab/actions/pipeline.lua
+++ b/lua/gitlab/actions/pipeline.lua
@@ -14,7 +14,7 @@ local function get_pipeline()
   local pipeline = state.INFO.head_pipeline or state.INFO.pipeline
 
   if type(pipeline) ~= "table" or (type(pipeline) == "table" and u.table_size(pipeline) == 0) then
-    vim.notify("Pipeline not found", vim.log.levels.WARN)
+    u.notify("Pipeline not found", vim.log.levels.WARN)
     return
   end
   return pipeline
@@ -86,12 +86,12 @@ M.retrigger = function()
   end
   local body = { pipeline_id = pipeline.id }
   if pipeline.status ~= "failed" then
-    vim.notify("Pipeline is not in a failed state!", vim.log.levels.WARN)
+    u.notify("Pipeline is not in a failed state!", vim.log.levels.WARN)
     return
   end
 
   job.run_job("/pipeline", "POST", body, function()
-    vim.notify("Pipeline re-triggered!", vim.log.levels.INFO)
+    u.notify("Pipeline re-triggered!", vim.log.levels.INFO)
   end)
 end
 
@@ -101,7 +101,7 @@ M.see_logs = function()
   local text = u.get_line_content(bufnr, linnr)
   local last_word = u.get_last_chunk(text)
   if last_word == nil then
-    vim.notify("Cannot find job name", vim.log.levels.ERROR)
+    u.notify("Cannot find job name", vim.log.levels.ERROR)
     return
   end
 
@@ -113,7 +113,7 @@ M.see_logs = function()
   end
 
   if j == nil then
-    vim.notify("Cannot find job in state", vim.log.levels.ERROR)
+    u.notify("Cannot find job in state", vim.log.levels.ERROR)
     return
   end
 
@@ -121,7 +121,7 @@ M.see_logs = function()
   job.run_job("/job", "GET", body, function(data)
     local file = data.file
     if file == "" then
-      vim.notify("Log trace is empty", vim.log.levels.WARN)
+      u.notify("Log trace is empty", vim.log.levels.WARN)
       return
     end
 
@@ -131,7 +131,7 @@ M.see_logs = function()
     end
 
     if #lines == 0 then
-      vim.notify("Log trace lines could not be parsed", vim.log.levels.ERROR)
+      u.notify("Log trace lines could not be parsed", vim.log.levels.ERROR)
       return
     end
 
diff --git a/lua/gitlab/actions/summary.lua b/lua/gitlab/actions/summary.lua
index 7ea38a7..4c8046c 100644
--- a/lua/gitlab/actions/summary.lua
+++ b/lua/gitlab/actions/summary.lua
@@ -63,7 +63,7 @@ M.edit_summary = function()
   local title = u.get_buffer_text(M.title_bufnr):gsub("\n", " ")
   local body = { title = title, description = description }
   job.run_job("/mr/summary", "PUT", body, function(data)
-    vim.notify(data.message, vim.log.levels.INFO)
+    u.notify(data.message, vim.log.levels.INFO)
     state.INFO.description = data.mr.description
     state.INFO.title = data.mr.title
     M.layout:unmount()
diff --git a/lua/gitlab/async.lua b/lua/gitlab/async.lua
index 281ace0..71b16a0 100644
--- a/lua/gitlab/async.lua
+++ b/lua/gitlab/async.lua
@@ -3,6 +3,7 @@
 local server = require("gitlab.server")
 local job = require("gitlab.job")
 local state = require("gitlab.state")
+local u = require("gitlab.utils")
 
 local M = {}
 
@@ -48,7 +49,7 @@ M.sequence = function(dependencies, cb)
     handler:init(cb)
 
     if not state.is_gitlab_project then
-      vim.notify("The gitlab.nvim state was not set. Do you have a .gitlab.nvim file configured?", vim.log.levels.ERROR)
+      u.notify("The gitlab.nvim state was not set. Do you have a .gitlab.nvim file configured?", vim.log.levels.ERROR)
       return
     end
 
diff --git a/lua/gitlab/init.lua b/lua/gitlab/init.lua
index e76f0fd..be39239 100644
--- a/lua/gitlab/init.lua
+++ b/lua/gitlab/init.lua
@@ -22,10 +22,11 @@ return {
     end
     server.build() -- Builds the Go binary if it doesn't exist
     state.setPluginConfiguration() -- Sets configuration from `.gitlab.nvim` file
-    state.merge_settings(args) -- Sets keymaps and other settings from setup function
+    if not state.merge_settings(args) then -- Sets keymaps and other settings from setup function
+      return
+    end
     require("gitlab.colors") -- Sets colors
-    reviewer.init() -- Picks and initializes reviewer (default is Delta)
-    u.has_reviewer(args.reviewer or "delta")
+    reviewer.init()
   end,
   -- Global Actions 🌎
   summary = async.sequence({ info }, summary.summary),
diff --git a/lua/gitlab/job.lua b/lua/gitlab/job.lua
index 5de022f..499c574 100644
--- a/lua/gitlab/job.lua
+++ b/lua/gitlab/job.lua
@@ -1,6 +1,7 @@
 -- This module is responsible for making API calls to the Go server and
 -- running the callbacks associated with those jobs when the JSON is returned
 local Job = require("plenary.job")
+local u = require("gitlab.utils")
 local M = {}
 
 M.run_job = function(endpoint, method, body, callback)
@@ -27,7 +28,7 @@ M.run_job = function(endpoint, method, body, callback)
           if type(output) == "string" then
             msg = string.format(msg .. ", got: '%s'", output)
           end
-          vim.notify(string.format(msg, endpoint, output), vim.log.levels.WARN)
+          u.notify(string.format(msg, endpoint, output), vim.log.levels.WARN)
           return
         end
         if data ~= nil then
@@ -36,23 +37,23 @@ M.run_job = function(endpoint, method, body, callback)
             callback(data)
           elseif status == "success" then
             local message = string.format("%s", data.message)
-            vim.notify(message, vim.log.levels.INFO)
+            u.notify(message, vim.log.levels.INFO)
           else
             local message = string.format("%s: %s", data.message, data.details)
-            vim.notify(message, vim.log.levels.ERROR)
+            u.notify(message, vim.log.levels.ERROR)
           end
         end
       end, 0)
     end,
     on_stderr = function()
       vim.defer_fn(function()
-        vim.notify("Could not run command!", vim.log.levels.ERROR)
+        u.notify("Could not run command!", vim.log.levels.ERROR)
       end, 0)
     end,
     on_exit = function(_, status)
       vim.defer_fn(function()
         if status ~= 0 then
-          vim.notify(string.format("Go server exited with non-zero code: %d", status), vim.log.levels.ERROR)
+          u.notify(string.format("Go server exited with non-zero code: %d", status), vim.log.levels.ERROR)
         end
       end, 0)
     end,
diff --git a/lua/gitlab/reviewer/delta.lua b/lua/gitlab/reviewer/delta.lua
deleted file mode 100644
index 98eacf2..0000000
--- a/lua/gitlab/reviewer/delta.lua
+++ /dev/null
@@ -1,254 +0,0 @@
--- This Module contains all of the code specific to the Delta reviewer.
-local state = require("gitlab.state")
-local u = require("gitlab.utils")
-
-local M = {
-  bufnr = nil,
-}
-
--- Public Functions
--- These functions are exposed externally and are used
--- when the reviewer is consumed by other code. They must follow the specification
--- outlined in the reviewer/init.lua file
-M.open = function()
-  local current_buf = vim.api.nvim_get_current_buf()
-  if current_buf == state.discussion_buf then
-    vim.api.nvim_command("wincmd w")
-  end
-
-  vim.cmd.enew()
-  if M.bufnr ~= nil then
-    vim.api.nvim_set_current_buf(M.bufnr)
-    return
-  end
-
-  local term_command_template =
-    "GIT_PAGER='delta --hunk-header-style omit --line-numbers --paging never --file-added-label %s --file-removed-label %s --file-modified-label %s' git diff %s...HEAD"
-
-  local term_command = string.format(
-    term_command_template,
-    state.settings.review_pane.delta.added_file,
-    state.settings.review_pane.delta.removed_file,
-    state.settings.review_pane.delta.modified_file,
-    state.INFO.target_branch
-  )
-
-  vim.fn.termopen(term_command) -- Calls delta and sends the output to the currently blank buffer
-  M.bufnr = vim.api.nvim_get_current_buf()
-  M.winnr = vim.api.nvim_get_current_win()
-end
-
-M.jump = function(file_name, new_line, old_line)
-  local linnr, error = M.get_jump_location(file_name, new_line, old_line)
-  if error ~= nil then
-    vim.notify(error, vim.log.levels.ERROR)
-    return
-  end
-
-  vim.api.nvim_set_current_win(M.winnr)
-  u.jump_to_buffer(M.bufnr, linnr)
-end
-
----Get the location of a line within the delta buffer. If range is specified, then also the location
----of the lines in range.
----@param range LineRange | nil Line range to get location for
----@return ReviewerInfo | nil nil is returned only if error was encountered
-M.get_location = function(range)
-  if M.bufnr == nil then
-    vim.notify("Delta reviewer must be initialized first", vim.log.levels.ERROR)
-    return
-  end
-
-  if range then
-    vim.notify("Multiline comments are not yet supported for delta reviewer", vim.log.levels.ERROR)
-    return
-  end
-
-  local bufnr = vim.api.nvim_get_current_buf()
-  if bufnr ~= M.bufnr then
-    vim.notify("Line location can only be determined within reviewer window")
-    return
-  end
-
-  local line_num = u.get_current_line_number()
-  local file_name = M.get_file_from_review_buffer(u.get_current_line_number())
-
-  local review_range, error = M.get_review_buffer_range(file_name)
-
-  if error ~= nil then
-    vim.notify(error, vim.log.levels.ERROR)
-    return
-  end
-
-  if review_range == nil then
-    vim.notify("Review buffer range could not be identified", vim.log.levels.ERROR)
-    return
-  end
-
-  -- In case the comment is left on a line without change information, we
-  -- iterate backward until we find it within the range of the changes
-  local current_line_changes = nil
-  local num = line_num
-  while review_range ~= nil and num >= review_range[1] and current_line_changes == nil do
-    local content = u.get_line_content(M.bufnr, num)
-    local change_nums = M.get_change_nums(content)
-    current_line_changes = change_nums
-    num = num - 1
-  end
-
-  if current_line_changes == nil then
-    vim.notify("Could not find current line change information", vim.log.levels.ERROR)
-    return
-  end
-
-  local new_line_num = line_num + 1
-  local next_line_changes = nil
-  while review_range ~= nil and new_line_num <= review_range[2] and next_line_changes == nil do
-    local content = u.get_line_content(M.bufnr, new_line_num)
-    local change_nums = M.get_change_nums(content)
-    next_line_changes = change_nums
-    new_line_num = new_line_num + 1
-  end
-
-  if next_line_changes == nil then
-    vim.notify("Could not find next line change information", vim.log.levels.ERROR)
-    return
-  end
-
-  local result = { file_name = file_name }
-  -- This is actually a modified line if these conditions are met
-  if
-    current_line_changes.old_line
-    and not current_line_changes.new_line
-    and not next_line_changes.old_line
-    and next_line_changes.new_line
-  then
-    result.old_line = current_line_changes.old
-    result.new_line = next_line_changes.new_line
-  else
-    vim.notify("Could not determine line location", vim.log.levels.ERROR)
-    return
-  end
-
-  return result
-end
-
--- Helper Functions 🤝
--- These functions are not exported and should be private
--- to the delta reviewer, they are used to support the public functions
-M.get_jump_location = function(file_name, new_line, old_line)
-  local range, error = M.get_review_buffer_range(file_name)
-  if error ~= nil then
-    return nil, error
-  end
-  if range == nil then
-    return nil, "Review buffer range could not be identified"
-  end
-
-  local linnr = nil
-
-  local lines = M.get_review_buffer_lines(range)
-  for _, line in ipairs(lines) do
-    local line_data = M.get_change_nums(line.line_content)
-    if line_data and old_line == line_data.old_line and new_line == line_data.new_line then
-      linnr = line.line_number
-      break
-    end
-  end
-  if linnr == nil then
-    return nil, "Could not find matching line"
-  end
-  return linnr, nil
-end
-
-M.get_file_from_review_buffer = function(linenr)
-  for i = linenr, 0, -1 do
-    local line_content = u.get_line_content(M.bufnr, i)
-    if M.starts_with_file_symbol(line_content) then
-      local file_name = u.get_last_chunk(line_content)
-      return file_name
-    end
-  end
-end
-
-M.get_change_nums = function(line)
-  local data, _ = line:match("(.-)" .. "│" .. "(.*)")
-  local line_data = {}
-  if data == nil then
-    return nil
-  end
-
-  if data ~= nil and data ~= "" then
-    local old_line = u.trim(u.get_first_chunk(data, "[^" .. "⋮" .. "]+"))
-    local new_line = u.trim(u.get_last_chunk(data, "[^" .. "⋮" .. "]+"))
-    line_data.new_line = tonumber(new_line)
-    line_data.old_line = tonumber(old_line)
-  end
-
-  if line_data.new_line == nil and line_data.old_line == nil then
-    return nil
-  end
-
-  return line_data
-end
-
-M.get_review_buffer_range = function(file_name)
-  if M.bufnr == nil then
-    return nil, "Delta reviewer must be initialized first"
-  end
-  local lines = vim.api.nvim_buf_get_lines(M.bufnr, 0, -1, false)
-  local start = nil
-  local stop = nil
-
-  for i, line in ipairs(lines) do
-    if start ~= nil and stop ~= nil then
-      return { start, stop }
-    end
-    if M.starts_with_file_symbol(line) then
-      -- Check if the file name matches the node name
-      local delta_file_name = u.get_last_chunk(line)
-      if file_name == delta_file_name then
-        start = i
-      elseif start ~= nil then
-        stop = i
-      end
-    end
-  end
-
-  -- We've reached the end of the file, set "stop" in case we already found start
-  stop = #lines
-  if start ~= nil and stop ~= nil then
-    return { start, stop }
-  end
-end
-
-M.starts_with_file_symbol = function(line)
-  for _, substring in ipairs({
-    state.settings.review_pane.delta.added_file,
-    state.settings.review_pane.delta.removed_file,
-    state.settings.review_pane.delta.modified_file,
-  }) do
-    if string.sub(line, 1, string.len(substring)) == substring then
-      return true
-    end
-  end
-  return false
-end
-
-M.get_review_buffer_lines = function(review_buffer_range)
-  local lines = {}
-  for i = review_buffer_range[1], review_buffer_range[2], 1 do
-    local line_content = vim.api.nvim_buf_get_lines(M.bufnr, i - 1, i, false)[1]
-    if string.find(line_content, "⋮") then
-      table.insert(lines, { line_content = line_content, line_number = i })
-    end
-  end
-  return lines
-end
-
---- This function is not supported for delta
-M.get_lines = function()
-  vim.notify("Getting lines in delta is not supported yet", vim.log.levels.ERROR)
-  return nil
-end
-return M
diff --git a/lua/gitlab/reviewer/diffview.lua b/lua/gitlab/reviewer/diffview.lua
index f53d0ee..6c4ff23 100644
--- a/lua/gitlab/reviewer/diffview.lua
+++ b/lua/gitlab/reviewer/diffview.lua
@@ -1,4 +1,4 @@
--- This Module contains all of the code specific to the Diffview reviewer.
+-- This Module contains all of the reviewer code for diffview
 local u = require("gitlab.utils")
 local state = require("gitlab.state")
 local async_ok, async = pcall(require, "diffview.async")
@@ -8,10 +8,6 @@ local M = {
   tabnr = nil,
 }
 
--- Public Functions
--- These functions are exposed externally and are used
--- when the reviewer is consumed by other code. They must follow the specification
--- outlined in the reviewer/init.lua file
 M.open = function()
   vim.api.nvim_command(string.format("DiffviewOpen %s", state.INFO.target_branch))
   M.tabnr = vim.api.nvim_get_current_tabpage()
@@ -19,14 +15,14 @@ end
 
 M.jump = function(file_name, new_line, old_line)
   if M.tabnr == nil then
-    vim.notify("Can't jump to Diffvew. Is it open?", vim.log.levels.ERROR)
+    u.notify("Can't jump to Diffvew. Is it open?", vim.log.levels.ERROR)
     return
   end
   vim.api.nvim_set_current_tabpage(M.tabnr)
   vim.cmd("DiffviewFocusFiles")
   local view = require("diffview.lib").get_current_view()
   if view == nil then
-    vim.notify("Could not find Diffview view", vim.log.levels.ERROR)
+    u.notify("Could not find Diffview view", vim.log.levels.ERROR)
     return
   end
   local files = view.panel:ordered_file_list()
@@ -34,7 +30,7 @@ M.jump = function(file_name, new_line, old_line)
   for _, file in ipairs(files) do
     if file.path == file_name then
       if not async_ok then
-        vim.notify("Could not load Diffview async", vim.log.levels.ERROR)
+        u.notify("Could not load Diffview async", vim.log.levels.ERROR)
         return
       end
       async.await(view:set_file(file))
@@ -56,7 +52,7 @@ end
 ---@return ReviewerInfo | nil nil is returned only if error was encountered
 M.get_location = function(range)
   if M.tabnr == nil then
-    vim.notify("Diffview reviewer must be initialized first")
+    u.notify("Diffview reviewer must be initialized first")
     return
   end
   local bufnr = vim.api.nvim_get_current_buf()
@@ -65,14 +61,14 @@ M.get_location = function(range)
   -- check if we are in the diffview tab
   local tabnr = vim.api.nvim_get_current_tabpage()
   if tabnr ~= M.tabnr then
-    vim.notify("Line location can only be determined within reviewer window")
+    u.notify("Line location can only be determined within reviewer window")
     return
   end
 
   -- check if we are in the diffview buffer
   local view = require("diffview.lib").get_current_view()
   if view == nil then
-    vim.notify("Could not find Diffview view", vim.log.levels.ERROR)
+    u.notify("Could not find Diffview view", vim.log.levels.ERROR)
     return
   end
   local layout = view.cur_layout
@@ -90,13 +86,13 @@ M.get_location = function(range)
     type = "new"
     is_new = true
   else
-    vim.notify("Line location can only be determined within reviewer window")
+    u.notify("Line location can only be determined within reviewer window")
     return
   end
 
   local hunks = u.parse_hunk_headers(result.file_name, state.INFO.target_branch)
   if hunks == nil then
-    vim.notify("Could not parse hunks", vim.log.levels.ERROR)
+    u.notify("Could not parse hunks", vim.log.levels.ERROR)
     return
   end
 
diff --git a/lua/gitlab/reviewer/init.lua b/lua/gitlab/reviewer/init.lua
index 1cced8d..f2edc29 100644
--- a/lua/gitlab/reviewer/init.lua
+++ b/lua/gitlab/reviewer/init.lua
@@ -1,7 +1,4 @@
--- This Module will pick the reviewer set in the user's
--- settings and then map all of it's functions
 local state = require("gitlab.state")
-local delta = require("gitlab.reviewer.delta")
 local diffview = require("gitlab.reviewer.diffview")
 
 local M = {
@@ -9,14 +6,16 @@ local M = {
 }
 
 local reviewer_map = {
-  delta = delta,
   diffview = diffview,
 }
 
 M.init = function()
   local reviewer = reviewer_map[state.settings.reviewer]
   if reviewer == nil then
-    vim.notify(string.format("gitlab.nvim could not find reviewer %s", state.settings.reviewer), vim.log.levels.ERROR)
+    vim.notify(
+      string.format("gitlab.nvim could not find reviewer %s, only diffview is supported", state.settings.reviewer),
+      vim.log.levels.ERROR
+    )
     return
   end
 
diff --git a/lua/gitlab/server.lua b/lua/gitlab/server.lua
index 6144b8e..a7f6eb5 100644
--- a/lua/gitlab/server.lua
+++ b/lua/gitlab/server.lua
@@ -48,7 +48,7 @@ M.start = function(callback)
         callback()
         callback_called = true
       elseif not callback_called then
-        vim.notify("Failed to parse server port", vim.log.levels.ERROR)
+        u.notify("Failed to parse server port", vim.log.levels.ERROR)
       end
     end,
     on_stderr = function(_, errors)
@@ -60,18 +60,15 @@ M.start = function(callback)
       end
 
       if err_msg ~= "" then
-        vim.notify(err_msg, vim.log.levels.ERROR)
+        u.notify(err_msg, vim.log.levels.ERROR)
       end
     end,
     on_exit = function(job_id, exit_code)
-      vim.notify(
-        "Golang gitlab server exited: job_id: " .. job_id .. ", exit_code: " .. exit_code,
-        vim.log.levels.ERROR
-      )
+      u.notify("Golang gitlab server exited: job_id: " .. job_id .. ", exit_code: " .. exit_code, vim.log.levels.ERROR)
     end,
   })
   if job_id <= 0 then
-    vim.notify("Could not start gitlab.nvim binary", vim.log.levels.ERROR)
+    u.notify("Could not start gitlab.nvim binary", vim.log.levels.ERROR)
   end
 end
 
@@ -96,7 +93,7 @@ M.build = function(override)
   local null = u.is_windows() and " >NUL" or " > /dev/null"
   local installCode = os.execute(command .. null)
   if installCode ~= 0 then
-    vim.notify("Could not install gitlab.nvim!", vim.log.levels.ERROR)
+    u.notify("Could not install gitlab.nvim!", vim.log.levels.ERROR)
     return false
   end
   return true
diff --git a/lua/gitlab/state.lua b/lua/gitlab/state.lua
index c4d98ba..6e778ec 100644
--- a/lua/gitlab/state.lua
+++ b/lua/gitlab/state.lua
@@ -11,7 +11,7 @@ M.settings = {
   port = nil, -- choose random port
   debug = { go_request = false, go_response = false },
   log_path = (vim.fn.stdpath("cache") .. "/gitlab.nvim.log"),
-  reviewer = "delta",
+  reviewer = "diffview",
   attachment_dir = "",
   popup = {
     exit = "<Esc>",
@@ -33,13 +33,6 @@ M.settings = {
     resolved = "✓",
     unresolved = "",
   },
-  review_pane = {
-    delta = {
-      added_file = "",
-      modified_file = "",
-      removed_file = "",
-    },
-  },
   pipeline = {
     created = "",
     pending = "",
@@ -51,12 +44,6 @@ M.settings = {
     success = "✓",
     failed = "",
   },
-  dialogue = {
-    focus_next = { "j", "<Down>", "<Tab>" },
-    focus_prev = { "k", "<Up>", "<S-Tab>" },
-    close = { "<Esc>", "<C-c>" },
-    submit = { "<CR>", "<Space>" },
-  },
   go_server_running = false,
   is_gitlab_project = false,
   colors = {
@@ -70,10 +57,35 @@ M.settings = {
 
 -- Merges user settings into the default settings, overriding them
 M.merge_settings = function(args)
-  if args == nil then
-    return
-  end
   M.settings = u.merge(M.settings, args)
+
+  -- Check deprecated settings and alert users!
+  if M.settings.dialogue ~= nil then
+    u.notify("The dialogue field has been deprecated, please remove it from your setup function", vim.log.levels.WARN)
+  end
+
+  if M.settings.reviewer == "delta" then
+    u.notify(
+      "Delta is no longer a supported reviewer, please use diffview and update your setup function",
+      vim.log.levels.ERROR
+    )
+    return false
+  end
+
+  local diffview_ok, _ = pcall(require, "diffview")
+  if not diffview_ok then
+    u.notify("Please install diffview, it is required")
+    return false
+  end
+
+  if M.settings.review_pane ~= nil then
+    u.notify(
+      "The review_pane field is only relevant for Delta, which has been deprecated, please remove it from your setup function",
+      vim.log.levels.WARN
+    )
+  end
+
+  return true
 end
 
 M.print_settings = function()
diff --git a/lua/gitlab/utils/init.lua b/lua/gitlab/utils/init.lua
index 2fcffa7..abb3f01 100644
--- a/lua/gitlab/utils/init.lua
+++ b/lua/gitlab/utils/init.lua
@@ -1,6 +1,10 @@
 local Job = require("plenary.job")
 local M = {}
 
+M.notify = function(msg, lvl)
+  vim.notify("gitlab.nvim: " .. msg, lvl)
+end
+
 M.get_colors_for_group = function(group)
   local normal_fg = vim.fn.synIDattr(vim.fn.synIDtrans((vim.fn.hlID(group))), "fg")
   local normal_bg = vim.fn.synIDattr(vim.fn.synIDtrans((vim.fn.hlID(group))), "bg")
@@ -11,20 +15,6 @@ M.get_current_line_number = function()
   return vim.api.nvim_call_function("line", { "." })
 end
 
-M.has_reviewer = function(reviewer)
-  if reviewer == "diffview" then
-    local diffview_ok, _ = pcall(require, "diffview")
-    if not diffview_ok then
-      error("Please install diffview or change your reviewer")
-    end
-  else
-    local has_reviewer = vim.fn.executable("delta") == 1
-    if not has_reviewer then
-      error(string.format("Please install delta or change your reviewer", reviewer))
-    end
-  end
-end
-
 M.is_windows = function()
   if vim.fn.has("win32") == 1 or vim.fn.has("win32unix") == 1 then
     return true
@@ -350,7 +340,7 @@ M.parse_hunk_headers = function(file_path, base_branch)
           end
         end
       else
-        vim.notify("Failed to get git diff: " .. j:stderr(), vim.log.levels.WARN)
+        M.notify("Failed to get git diff: " .. j:stderr(), vim.log.levels.WARN)
       end
     end,
   })
@@ -444,7 +434,7 @@ end
 M.check_visual_mode = function()
   local mode = vim.api.nvim_get_mode().mode
   if mode ~= "v" and mode ~= "V" then
-    vim.notify("Code suggestions are only available in visual mode", vim.log.levels.WARN)
+    M.notify("Code suggestions are only available in visual mode", vim.log.levels.WARN)
     return false
   end
   return true