use same components for plugin and repository overview

Created CardColumn and CardColumnGroup which encapsulate the layout for the two column card layout and use them for repository and plugin overview.

scm-ui-components/packages/ui-components/src/CardColumnGroup.js

@@ -0,0 +1,103 @@
+//@flow
+import * as React from "react";
+import injectSheet from "react-jss";
+import classNames from "classnames";
+
+const styles = {
+  pointer: {
+    cursor: "pointer",
+    fontSize: "1.5rem"
+  },
+  repoGroup: {
+    marginBottom: "1em"
+  },
+  wrapper: {
+    padding: "0 0.75rem"
+  },
+  clearfix: {
+    clear: "both"
+  }
+};
+
+type Props = {
+  name: string,
+  elements: React.Node[],
+
+  // context props
+  classes: any
+};
+
+type State = {
+  collapsed: boolean
+};
+
+class CardColumnGroup extends React.Component<Props, State> {
+  constructor(props: Props) {
+    super(props);
+    this.state = {
+      collapsed: false
+    };
+  }
+
+  toggleCollapse = () => {
+    this.setState(prevState => ({
+      collapsed: !prevState.collapsed
+    }));
+  };
+
+  isLastEntry = (array: React.Node[], index: number) => {
+    return index === array.length - 1;
+  };
+
+  isLengthOdd = (array: React.Node[]) => {
+    return array.length % 2 !== 0;
+  };
+
+  isFullSize = (array: React.Node[], index: number) => {
+    return this.isLastEntry(array, index) && this.isLengthOdd(array);
+  };
+
+  render() {
+    const { name, elements, classes } = this.props;
+    const { collapsed } = this.state;
+
+    const icon = collapsed ? "fa-angle-right" : "fa-angle-down";
+    let content = null;
+    if (!collapsed) {
+      content = elements.map((entry, index) => {
+        const fullColumnWidth = this.isFullSize(elements, index);
+        const sizeClass = fullColumnWidth ? "is-full" : "is-half";
+        return (
+          <div
+            className={classNames(
+              "box",
+              "box-link-shadow",
+              "column",
+              "is-clipped",
+              sizeClass
+            )}
+            key={index}
+          >
+            {entry}
+          </div>
+        );
+      });
+    }
+    return (
+      <div className={classes.repoGroup}>
+        <h2>
+          <span className={classes.pointer} onClick={this.toggleCollapse}>
+            <i className={classNames("fa", icon)} /> {name}
+          </span>
+        </h2>
+        <hr />
+        <div className={classNames("columns", "is-multiline", classes.wrapper)}>
+          {content}
+        </div>
+        <div className={classes.clearfix} />
+      </div>
+    );
+  }
+}
+
+export default injectSheet(styles)(CardColumnGroup);