added config code; started completions code

Author: mikecentola

src/config.ts

@@ -0,0 +1,18 @@
+import { WorkspaceConfiguration, workspace } from "vscode";
+
+class Config {
+    private config: WorkspaceConfiguration;
+
+    constructor() {
+        workspace.onDidChangeConfiguration((e) => this.reloadConfig());
+
+        this.config = workspace.getConfiguration("gcode");
+    }
+
+    private reloadConfig() {
+        this.config = workspace.getConfiguration("gcode");
+    } 
+
+}
+
+export const config = new Config();

src/providers/gcode_completions.ts

@@ -0,0 +1,38 @@
+// Rerieve/Load Snippets based on configuration settings
+
+import * as path from "path";
+import * as vscode from "vscode";
+import  { config } from "../config";
+
+
+export class GcodeCompletionItemProvider implements vscode.CompletionItemProvider {
+    private completions = new vscode.CompletionList();
+
+    constructor(filename: string) {
+        const snippets = require(path.join("../..", filename));
+
+        for (const snippetType of Object.keys(snippets)) {
+            for (const snippetName of Object.keys(snippets[snippetType])) {
+                const snippet = snippets[snippetType][snippetName];
+                const completionItem = new vscode.CompletionItem(snippetName, CompletionItemKind.Snippet);
+                completionItem.filterText = snippet.prefix;
+                completionItem.insertText = new vscode.SnippetString(
+                    isArray(snippet.body)
+                        ? snippet.body.join("\n")
+                        : snippet.body,
+                );
+
+                completionItem.detail = snippet.description;
+                completionItem.documentation = new vscode.MarkdownString().appendCodeblock(completionItem.insertText.value);
+                this.completions.items.push(completionItem);
+            }
+        }
+    }
+
+    public provideCompletionItems(
+        document: vscode.TextDocument, position: Position, token: vscode.CancellationToken,
+    ): vscode.CompletionList {
+        return this.completions;
+    }
+}
+