From c622dd62069cab9a518216cf23a0c6b14acdd847 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ensar=20Saraj=C4=8Di=C4=87?= <es.ensar@gmail.com>
Date: Tue, 3 May 2022 17:55:10 +0200
Subject: [PATCH] Add basic ledger completion source to null-ls

---
 .../nvim/lua/esensar/lsp/diagnostic.lua       |  3 ++
 .../lua/esensar/lsp/null-ls_sources/init.lua  |  3 ++
 .../esensar/lsp/null-ls_sources/ledger.lua    | 40 +++++++++++++++++++
 3 files changed, 46 insertions(+)
 create mode 100644 symlinks/config/nvim/lua/esensar/lsp/null-ls_sources/ledger.lua

diff --git a/symlinks/config/nvim/lua/esensar/lsp/diagnostic.lua b/symlinks/config/nvim/lua/esensar/lsp/diagnostic.lua
index 8ce929e..737e4cb 100644
--- a/symlinks/config/nvim/lua/esensar/lsp/diagnostic.lua
+++ b/symlinks/config/nvim/lua/esensar/lsp/diagnostic.lua
@@ -53,6 +53,9 @@ null_ls.setup({
 		-- Godot
 		custom_sources.formatters.gdformat,
 		custom_sources.diagnostics.gdlint,
+
+		-- Vim-Ledger
+		custom_sources.completion.ledger,
 	},
 	on_attach = common_config.on_attach,
 })
diff --git a/symlinks/config/nvim/lua/esensar/lsp/null-ls_sources/init.lua b/symlinks/config/nvim/lua/esensar/lsp/null-ls_sources/init.lua
index ee52e3f..a30eb79 100644
--- a/symlinks/config/nvim/lua/esensar/lsp/null-ls_sources/init.lua
+++ b/symlinks/config/nvim/lua/esensar/lsp/null-ls_sources/init.lua
@@ -6,4 +6,7 @@ return {
 	diagnostics = {
 		gdlint = require("esensar.lsp.null-ls_sources.gdlint"),
 	},
+	completion = {
+		ledger = require("esensar.lsp.null-ls_sources.ledger"),
+	},
 }
diff --git a/symlinks/config/nvim/lua/esensar/lsp/null-ls_sources/ledger.lua b/symlinks/config/nvim/lua/esensar/lsp/null-ls_sources/ledger.lua
new file mode 100644
index 0000000..c7dbfb2
--- /dev/null
+++ b/symlinks/config/nvim/lua/esensar/lsp/null-ls_sources/ledger.lua
@@ -0,0 +1,40 @@
+local null_ls = require("null-ls")
+local helpers = require("null-ls.helpers")
+
+return {
+	name = "ledger-complete",
+	meta = {
+		url = "https://github.com/ledger/vim-ledger",
+		description = "vim-ledger omnifunc completion source",
+	},
+	method = null_ls.methods.COMPLETION,
+	filetypes = { "ledger" },
+	generator = helpers.generator_factory({
+		fn = function(params, done)
+			-- This can be slow
+			if #params.word_to_complete < 4 then
+				done({ { items = {}, isIncomplete = false } })
+				return
+			end
+
+			vim.fn.LedgerComplete(1, nil)
+			local results = vim.fn.LedgerComplete(0, #params.word_to_complete)
+
+			local words = {}
+			local items = {}
+			for result in ipairs(results) do
+				table.insert(words, result)
+			end
+
+			for _, word in ipairs(words) do
+				table.insert(items, {
+					label = word,
+					insertText = word,
+				})
+			end
+
+			done({ { items = items, isIncomplete = #items == 0 } })
+		end,
+		async = true,
+	}),
+}