Add tsserver support

autoload/ale/lsp/response.vim

@@ -15,7 +15,7 @@ function! ale#lsp#response#ReadDiagnostics(params) abort
     for l:diagnostic in a:params.diagnostics
         let l:severity = get(l:diagnostic, 'severity', 0)
         let l:loclist_item = {
-        \   'message': l:diagnostic.message,
+        \   'text': l:diagnostic.message,
         \   'type': 'E',
         \   'lnum': l:diagnostic.range.start.line + 1,
         \   'col': l:diagnostic.range.start.character + 1,
@@ -42,3 +42,26 @@ function! ale#lsp#response#ReadDiagnostics(params) abort
 
     return [l:filename, l:loclist]
 endfunction
+
+function! ale#lsp#response#ReadTSServerDiagnostics(response) abort
+    let l:loclist = []
+
+    for l:diagnostic in a:response.body.diagnostics
+        let l:loclist_item = {
+        \   'text': l:diagnostic.text,
+        \   'type': 'E',
+        \   'lnum': l:diagnostic.start.line,
+        \   'col': l:diagnostic.start.offset,
+        \   'end_lnum': l:diagnostic.end.line,
+        \   'end_col': l:diagnostic.end.offset,
+        \}
+
+        if has_key(l:diagnostic, 'code')
+            let l:loclist_item.nr = l:diagnostic.code
+        endif
+
+        call add(l:loclist, l:loclist_item)
+    endfor
+
+    return l:loclist
+endfunction

autoload/ale/lsp/tsserver_message.vim

@@ -19,16 +19,19 @@ endfunction
 function! ale#lsp#tsserver_message#Change(buffer) abort
     let l:lines = getbufline(a:buffer, 1, '$')
 
+    " We will always use a very high endLine number, so we can delete
+    " lines from files. tsserver will gladly accept line numbers beyond the
+    " end.
     return [1, 'ts@change', {
     \   'file': expand('#' . a:buffer . ':p'),
     \   'line': 1,
     \   'offset': 1,
-    \   'endLine': len(l:lines),
-    \   'endOffset': len(l:lines[-1]),
+    \   'endLine': 1073741824 ,
+    \   'endOffset': 1,
     \   'insertString': join(l:lines, "\n"),
     \}]
 endfunction
 
 function! ale#lsp#tsserver_message#Geterr(buffer) abort
-    return [1, 'ts@geterr', {'files': [expand('#' . a:buffer . ':p')]}]
+    return [0, 'ts@geterr', {'files': [expand('#' . a:buffer . ':p')]}]
 endfunction