export/import column map support

packages/web/src/impexp/ImportExportConfigurator.svelte

@@ -42,11 +42,14 @@
 <script lang="ts">
   import { onMount } from 'svelte';
   import { writable } from 'svelte/store';
+  import Link from '../elements/Link.svelte';
   import TableControl from '../elements/TableControl.svelte';
   import CheckboxField from '../forms/CheckboxField.svelte';
   import { getFormContext } from '../forms/FormProviderCore.svelte';
   import TextField from '../forms/TextField.svelte';
   import FontIcon from '../icons/FontIcon.svelte';
+  import ColumnMapModal from '../modals/ColumnMapModal.svelte';
+  import { showModal } from '../modals/modalTools';
   import { findFileFormat } from '../plugins/fileformats';
   import { extensions } from '../stores';
   import getAsArray from '../utility/getAsArray';
@@ -189,6 +192,11 @@
           header: 'Preview',
           slot: 0,
         },
+        {
+          fieldName: 'columns',
+          header: 'Columns',
+          slot: 2,
+        },
       ]}
     >
       <svelte:fragment slot="0" let:row>
@@ -214,6 +222,18 @@
             )}
         />
       </svelte:fragment>
+      <svelte:fragment slot="2" let:row>
+        {@const columnCount = ($values[`columns_${row}`] || []).filter(x => !x.skip).length}
+        <Link
+          onClick={() => {
+            showModal(ColumnMapModal, {
+              value: $values[`columns_${row}`],
+              onConfirm: value => setFieldValue(`columns_${row}`, value),
+            });
+          }}
+          >{columnCount > 0 ? `(${columnCount} columns)` : '(copy from source)'}
+        </Link>
+      </svelte:fragment>
     </TableControl>
   </div>
 </div>

packages/web/src/impexp/ScriptWriter.ts

@@ -25,12 +25,20 @@ export default class ScriptWriter {
     this.packageNames.push(...extractShellApiPlugins(functionName, props));
   }
 
+  assignValue(variableName, jsonValue) {
+    this.put(`const ${variableName} = ${JSON.stringify(jsonValue)};`);
+  }
+
   requirePackage(packageName) {
     this.packageNames.push(packageName);
   }
 
-  copyStream(sourceVar, targetVar) {
-    this.put(`await dbgateApi.copyStream(${sourceVar}, ${targetVar});`);
+  copyStream(sourceVar, targetVar, colmapVar) {
+    if (colmapVar) {
+      this.put(`await dbgateApi.copyStream(${sourceVar}, ${targetVar}, {columns: ${colmapVar}});`);
+    } else {
+      this.put(`await dbgateApi.copyStream(${sourceVar}, ${targetVar});`);
+    }
   }
 
   comment(s) {

packages/web/src/impexp/createImpExpScript.ts

@@ -186,7 +186,14 @@ export default async function createImpExpScript(extensions, values, addEditorIn
     // @ts-ignore
     script.assign(targetVar, ...getTargetExpr(extensions, sourceName, values, targetConnection, targetDriver));
 
-    script.copyStream(sourceVar, targetVar);
+    const colmap = (values[`columns_${sourceName}`] || []).filter(x => !x.skip);
+    let colmapVar = null;
+    if (colmap.length > 0) {
+      colmapVar = script.allocVariable();
+      script.assignValue(colmapVar, colmap);
+    }
+
+    script.copyStream(sourceVar, targetVar, colmapVar);
     script.put();
   }
   if (addEditorInfo) {