Create collection-panel-files actions and reducer

Feature #13855

Arvados-DCO-1.1-Signed-off-by: Michal Klobukowski <michal.klobukowski@contractors.roche.com>

diff --git a/src/store/collection-panel/collection-panel-files/collection-panel-files-actions.ts b/src/store/collection-panel/collection-panel-files/collection-panel-files-actions.ts
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+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
+import { default as unionize, ofType, UnionOf } from "unionize";
+import { CollectionPanelFilesState, CollectionPanelFile } from "./collection-panel-files-state";
+
+export const collectionPanelFilesAction = unionize({
+    SET_COLLECTION_FILES: ofType<{ files: CollectionPanelFilesState }>(),
+    TOGGLE_COLLECTION_FILE_COLLAPSE: ofType<{ id: string }>(),
+    TOGGLE_COLLECTION_FILE_SELECTION: ofType<{ id: string }>()
+}, { tag: 'type', value: 'payload' });
+
+export type CollectionPanelFilesAction = UnionOf<typeof collectionPanelFilesAction>;
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diff --git a/src/store/collection-panel/collection-panel-files/collection-panel-files-state.ts b/src/store/collection-panel/collection-panel-files/collection-panel-files-state.ts
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+++ b/src/store/collection-panel/collection-panel-files/collection-panel-files-state.ts
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+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
+export type CollectionPanelFilesState = Array<CollectionPanelFile>;
+
+export interface CollectionPanelFile {
+    parentId: string;
+    id: string;
+    name: string;
+    size: number;
+    collapsed: boolean;
+    selected: boolean;
+    type: string;
+}
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diff --git a/src/store/collection-panel/collection-panel-files/collections-panel-files-reducer.ts b/src/store/collection-panel/collection-panel-files/collections-panel-files-reducer.ts
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+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
+import { CollectionPanelFilesState } from "./collection-panel-files-state";
+import { CollectionPanelFilesAction, collectionPanelFilesAction } from "./collection-panel-files-actions";
+
+export const collectionPanelFilesReducer = (state: CollectionPanelFilesState = [], action: CollectionPanelFilesAction) => {
+    return collectionPanelFilesAction.match(action, {
+        SET_COLLECTION_FILES: data => data.files,
+        TOGGLE_COLLECTION_FILE_COLLAPSE: data => toggle(state, data.id, "collapsed"),
+        TOGGLE_COLLECTION_FILE_SELECTION: data => toggle(state, data.id, "selected"),
+        default: () => state
+    });
+};
+
+const toggle = (state: CollectionPanelFilesState, id: string, key: "collapsed" | "selected") =>
+    state.map(file => file.id === id
+        ? { ...file, [key]: !file[key] }
+        : file);
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