1 files changed, 97 insertions, 0 deletions
diff --git a/src/group-imports.js b/src/group-imports.js
new file mode 100644
index 0000000..00300e4
--- /dev/null
+++ b/src/group-imports.js
@@ -0,0 +1,97 @@
+const vscode = require('vscode');
+const { getModuleName, getImportsRange, getFileContent } = require('./utils');
+
+const BUILTIN_TYPE = "builtin"
+const THIRD_PARTY_TYPE = "thirdParty"
+const VENDOR_TYPE = "vendor"
+const LOCAL_TYPE = "local"
+
+
+function getImports(fileContent) {
+    try {
+        let importsRegex = new RegExp("(?<=import \\(\n).*?(?=\\))", "s")
+        let imports = importsRegex.exec(fileContent)[0]
+        return imports
+    } catch(_) {
+        vscode.window.showErrorMessage("Could not find imports")
+    }
+}
+
+function convertImportsToList(imports) {
+    return imports.split("\n")
+}
+
+function getImportType(import_) { 
+    let goModName = getModuleName() + "/"
+    let vendorPath = goModName.substring(0, goModName.lastIndexOf('/'));
+    
+    let isBuiltin = !import_.includes(".") && !import_.includes(goModName)
+    let isThirdParty = import_.includes(".") && !import_.includes(goModName)
+    let isLocal = import_.includes(goModName)
+    let isVendor = import_.includes(vendorPath) && !isLocal
+
+    if(isBuiltin) {
+        return BUILTIN_TYPE
+    } else if (isVendor) {
+        return VENDOR_TYPE
+    } else if(isThirdParty) {
+        return THIRD_PARTY_TYPE
+    } else if(isLocal) {
+        return LOCAL_TYPE
+    }
+}
+
+function importGroupsToString(importsGroup) {
+    return Object.keys(importsGroup)
+    .filter((key) => importsGroup[key].length)
+    .map((key) => importsGroup[key].join('\n'))
+    .join('\n\n');
+}
+
+function saveImportsGroup(importsGroup, importRanges, activeEditor) {
+    const edit = new vscode.WorkspaceEdit();
+    const range = new vscode.Range(
+        importRanges.start,
+        0,
+        importRanges.end - 1,
+        Number.MAX_VALUE
+    );
+
+    let importsParsed = importGroupsToString(importsGroup)
+    let documentUri = activeEditor.document.uri
+    
+    edit.replace(documentUri, range, importsParsed);
+    vscode.workspace.applyEdit(edit).then(activeEditor.document.save);
+}
+
+
+function getImportGroups(importsList) {
+    const importsGroup = {
+        [BUILTIN_TYPE]: [],
+        [THIRD_PARTY_TYPE]: [],
+        [VENDOR_TYPE]: [],
+        [LOCAL_TYPE]: [],
+    };
+    
+
+    importsList.filter(n => n).forEach(import_ => {
+        let importType = getImportType(import_)
+        importsGroup[importType].push(import_)
+    })
+
+    return importsGroup
+}
+
+function formatImports() {
+    const activeEditor = vscode.window.activeTextEditor
+    let fileContent = getFileContent(activeEditor)
+    let imports = getImports(fileContent)
+    let importsList = convertImportsToList(imports)
+    let importsGroup = getImportGroups(importsList)
+    let importsRange = getImportsRange(fileContent)
+    saveImportsGroup(importsGroup,importsRange,activeEditor)
+}
+
+
+
+module.exports = formatImports;
+\ No newline at end of file