feat: snippets (#385)

Closes #59

Co-authored-by: Mitchell Hanberg <[email protected]>

Author: lucacervello

lib/next_ls.ex

@@ -579,7 +579,7 @@ defmodule NextLS do
           _ -> []
         end
       end)
-      |> Enum.map(fn %{name: name, kind: kind} = symbol ->
+      |> Enum.reduce([], fn %{name: name, kind: kind} = symbol, results ->
         {label, kind, docs} =
           case kind do
             :struct -> {name, GenLSP.Enumerations.CompletionItemKind.struct(), ""}
@@ -592,13 +592,20 @@ defmodule NextLS do
             _ -> {name, GenLSP.Enumerations.CompletionItemKind.text(), ""}
           end
 
-        %GenLSP.Structures.CompletionItem{
-          label: label,
-          kind: kind,
-          insert_text: name,
-          documentation: docs
-        }
+        completion_item =
+          %GenLSP.Structures.CompletionItem{
+            label: label,
+            kind: kind,
+            insert_text: name,
+            documentation: docs
+          }
+
+        case NextLS.Snippet.get(label, nil) do
+          nil -> [completion_item | results]
+          %{} = snippet -> [Map.merge(completion_item, snippet) | results]
+        end
       end)
+      |> Enum.reverse()
 
     {:reply, results, lsp}
   rescue

lib/next_ls/snippet.ex

@@ -1,9 +1,8 @@
 defmodule NextLS.Snippet do
   @moduledoc false
 
-  def get("defmodule" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("defmodule/2", nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -14,9 +13,8 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("defstruct" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("defstruct/1", nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -25,9 +23,8 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("defprotocol" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("defprotocol/2", nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -38,38 +35,36 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("defimpl" = label, nil) do
-    [
-      %GenLSP.Structures.CompletionItem{
-        label: label,
-        kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
-        insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
-        insert_text: """
-        defimpl ${1:ProtocolName} do
-          def ${2:function_name}(${3:parameter_name}) do
-            $0
-          end
+  def get("defimpl/2", nil) do
+    %{
+      kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
+      insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
+      insert_text: """
+      defimpl ${1:ProtocolName} do
+        def ${2:function_name}(${3:parameter_name}) do
+          $0
         end
-        """
-      },
-      %GenLSP.Structures.CompletionItem{
-        label: label <> "f",
-        kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
-        insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
-        insert_text: """
-        defimpl ${1:ProtocolName}, for: ${2:StructName} do
-          def ${3:function_name}(${4:parameter_name}) do
-            $0
-          end
+      end
+      """
+    }
+  end
+
+  def get("defimpl/3", nil) do
+    %{
+      kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
+      insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
+      insert_text: """
+      defimpl ${1:ProtocolName}, for: ${2:StructName} do
+        def ${3:function_name}(${4:parameter_name}) do
+          $0
         end
-        """
-      }
-    ]
+      end
+      """
+    }
   end
 
-  def get("def" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("def/" <> _, nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -80,9 +75,8 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("defp" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("defp/" <> _, nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -93,9 +87,8 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("defmacro" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("defmacro/" <> _, nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -108,9 +101,8 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("defmacrop" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("defmacrop/" <> _, nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -123,9 +115,8 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("for" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("for/" <> _, nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -136,9 +127,8 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("with" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("with/" <> _, nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -149,9 +139,8 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("case" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("case/" <> _, nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """
@@ -166,9 +155,8 @@ defmodule NextLS.Snippet do
     }
   end
 
-  def get("cond" = label, nil) do
-    %GenLSP.Structures.CompletionItem{
-      label: label,
+  def get("cond/" <> _, nil) do
+    %{
       kind: GenLSP.Enumerations.CompletionItemKind.snippet(),
       insert_text_format: GenLSP.Enumerations.InsertTextFormat.snippet(),
       insert_text: """