Lazy load database offer in data explorer (#208)

Co-authored-by: zfoster <notzachfoster@gmail.com>

src/Explorer/Controls/TreeComponent/TreeComponent.test.tsx

@@ -159,4 +159,20 @@ describe("TreeNodeComponent", () => {
     const wrapper = shallow(<TreeNodeComponent {...props} />);
     expect(wrapper).toMatchSnapshot();
   });
+
+  it("renders loading icon", () => {
+    const node: TreeNode = {
+      label: "label",
+      children: [],
+      isExpanded: true
+    };
+
+    const props = {
+      node,
+      generation: 2,
+      paddingLeft: 9
+    };
+    const wrapper = shallow(<TreeNodeComponent {...props} />);
+    expect(wrapper).toMatchSnapshot();
+  });
 });

src/Explorer/Controls/TreeComponent/TreeComponent.tsx

@@ -17,12 +17,14 @@ import {
 
 import TriangleDownIcon from "../../../../images/Triangle-down.svg";
 import TriangleRightIcon from "../../../../images/Triangle-right.svg";
+import LoadingIndicator_3Squares from "../../../../images/LoadingIndicator_3Squares.gif";
 
 export interface TreeNodeMenuItem {
   label: string;
   onClick: () => void;
   iconSrc?: string;
   isDisabled?: boolean;
+  styleClass?: string;
 }
 
 export interface TreeNode {
@@ -37,6 +39,7 @@ export interface TreeNode {
   data?: any; // Piece of data corresponding to this node
   timestamp?: number;
   isLeavesParentsSeparate?: boolean; // Display parents together first, then leaves
+  isLoading?: boolean;
   isSelected?: () => boolean;
   onClick?: (isExpanded: boolean) => void; // Only if a leaf, other click will expand/collapse
   onExpanded?: () => void;
@@ -183,6 +186,9 @@ export class TreeNodeComponent extends React.Component<TreeNodeComponentProps, T
           )}
           {node.contextMenu && this.renderContextMenuButton(node)}
         </div>
+        <div className="loadingIconContainer">
+          <img className="loadingIcon" src={LoadingIndicator_3Squares} hidden={!this.props.node.isLoading} />
+        </div>
         {node.children && (
           <AnimateHeight duration={TreeNodeComponent.transitionDurationMS} height={this.state.isExpanded ? "auto" : 0}>
             <div className="nodeChildren" data-test={node.label}>
@@ -256,13 +262,20 @@ export class TreeNodeComponent extends React.Component<TreeNodeComponentProps, T
                 onContextMenu={e => e.target.dispatchEvent(TreeNodeComponent.createClickEvent())}
               >
                 {props.item.onRenderIcon()}
-                <span className="treeComponentMenuItemLabel">{props.item.text}</span>
+                <span
+                  className={
+                    "treeComponentMenuItemLabel" + (props.item.className ? ` ${props.item.className}Label` : "")
+                  }
+                >
+                  {props.item.text}
+                </span>
               </div>
             ),
             items: node.contextMenu.map((menuItem: TreeNodeMenuItem) => ({
               key: menuItem.label,
               text: menuItem.label,
               disabled: menuItem.isDisabled,
+              className: menuItem.styleClass,
               onClick: menuItem.onClick,
               onRenderIcon: (props: any) => <img src={menuItem.iconSrc} alt="" />
             }))

src/Explorer/Controls/TreeComponent/__snapshots__/TreeComponent.test.tsx.snap

@@ -63,6 +63,15 @@ exports[`TreeNodeComponent does not render children by default 1`] = `
       label
     </span>
   </div>
+  <div
+    className="loadingIconContainer"
+  >
+    <img
+      className="loadingIcon"
+      hidden={true}
+      src=""
+    />
+  </div>
   <AnimateHeight
     animateOpacity={false}
     animationStateClasses={
@@ -179,6 +188,7 @@ exports[`TreeNodeComponent renders a simple node (sorted children, expanded) 1`]
             "isBeakVisible": false,
             "items": Array [
               Object {
+                "className": undefined,
                 "disabled": true,
                 "key": "menuLabel",
                 "onClick": undefined,
@@ -201,6 +211,15 @@ exports[`TreeNodeComponent renders a simple node (sorted children, expanded) 1`]
       />
     </div>
   </div>
+  <div
+    className="loadingIconContainer"
+  >
+    <img
+      className="loadingIcon"
+      hidden={true}
+      src=""
+    />
+  </div>
   <AnimateHeight
     animateOpacity={false}
     animationStateClasses={
@@ -261,6 +280,77 @@ exports[`TreeNodeComponent renders a simple node (sorted children, expanded) 1`]
 </div>
 `;
 
+exports[`TreeNodeComponent renders loading icon 1`] = `
+<div
+  className=" main2 nodeItem "
+  onClick={[Function]}
+  onKeyPress={[Function]}
+>
+  <div
+    className="treeNodeHeader "
+    data-test="label"
+    style={
+      Object {
+        "paddingLeft": 9,
+      }
+    }
+    tabIndex={-1}
+  >
+    <img
+      alt="label branch is expanded"
+      className="expandCollapseIcon"
+      onKeyPress={[Function]}
+      role="button"
+      src=""
+      tabIndex={0}
+    />
+    <span
+      className="nodeLabel"
+      title="label"
+    >
+      label
+    </span>
+  </div>
+  <div
+    className="loadingIconContainer"
+  >
+    <img
+      className="loadingIcon"
+      hidden={true}
+      src=""
+    />
+  </div>
+  <AnimateHeight
+    animateOpacity={false}
+    animationStateClasses={
+      Object {
+        "animating": "rah-animating",
+        "animatingDown": "rah-animating--down",
+        "animatingToHeightAuto": "rah-animating--to-height-auto",
+        "animatingToHeightSpecific": "rah-animating--to-height-specific",
+        "animatingToHeightZero": "rah-animating--to-height-zero",
+        "animatingUp": "rah-animating--up",
+        "static": "rah-static",
+        "staticHeightAuto": "rah-static--height-auto",
+        "staticHeightSpecific": "rah-static--height-specific",
+        "staticHeightZero": "rah-static--height-zero",
+      }
+    }
+    applyInlineTransitions={true}
+    delay={0}
+    duration={200}
+    easing="ease"
+    height="auto"
+    style={Object {}}
+  >
+    <div
+      className="nodeChildren"
+      data-test="label"
+    />
+  </AnimateHeight>
+</div>
+`;
+
 exports[`TreeNodeComponent renders sorted children, expanded, leaves and parents separated 1`] = `
 <div
   className="nodeClassname main12 nodeItem "
@@ -331,6 +421,15 @@ exports[`TreeNodeComponent renders sorted children, expanded, leaves and parents
       />
     </div>
   </div>
+  <div
+    className="loadingIconContainer"
+  >
+    <img
+      className="loadingIcon"
+      hidden={true}
+      src=""
+    />
+  </div>
   <AnimateHeight
     animateOpacity={false}
     animationStateClasses={
@@ -450,6 +549,15 @@ exports[`TreeNodeComponent renders unsorted children by default 1`] = `
       label
     </span>
   </div>
+  <div
+    className="loadingIconContainer"
+  >
+    <img
+      className="loadingIcon"
+      hidden={true}
+      src=""
+    />
+  </div>
   <AnimateHeight
     animateOpacity={false}
     animationStateClasses={

src/Explorer/Controls/TreeComponent/treeComponent.less

@@ -20,7 +20,7 @@
       }
 
       &.showingMenu {
-        background-color: #EEE;
+        background-color: #eee;
       }
 
       .treeMenuEllipsis {
@@ -78,3 +78,12 @@
     vertical-align: text-bottom;
   }
 }
+
+.loadingIconContainer {
+  width: 100%;
+
+  .loadingIcon {
+    height: 6px;
+    margin-left: 38px;
+  }
+}