From 809678383ad437a3eecd93f3101a067da146d2b5 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Sirois <jp@veksen.net>
Date: Mon, 12 Aug 2019 20:07:46 -0400
Subject: [PATCH] feat(resources): implement breadcrumbs

---
 src/components/ResourceBreadcrumb/index.tsx   | 47 +++++++++++++++++++
 src/components/ResourceBreadcrumb/styles.tsx  | 38 +++++++++++++++
 src/components/ResourceHeader/index.tsx       |  5 ++
 src/components/ResourceHeader/styles.tsx      |  1 +
 .../ResourcesSidebar/useBuildTree.tsx         | 26 +---------
 src/templates/languagePost.tsx                |  3 ++
 src/utils/index.ts                            | 24 ++++++++++
 7 files changed, 120 insertions(+), 24 deletions(-)
 create mode 100644 src/components/ResourceBreadcrumb/index.tsx
 create mode 100644 src/components/ResourceBreadcrumb/styles.tsx
 create mode 100644 src/utils/index.ts

diff --git a/src/components/ResourceBreadcrumb/index.tsx b/src/components/ResourceBreadcrumb/index.tsx
new file mode 100644
index 0000000..fa8749a
--- /dev/null
+++ b/src/components/ResourceBreadcrumb/index.tsx
@@ -0,0 +1,47 @@
+import React from "react"
+
+import { IFileOrFolder } from "../ResourcesSidebar/index"
+import ChevronUp from "../../icons/chevron-up.svg"
+import { traversePaths } from "../../utils"
+import * as SC from "./styles"
+
+interface ResourceBreadcrumbProps {
+  relativePath: any
+}
+
+function Link({ item }: { item: IFileOrFolder }) {
+  return <SC.StyledLink to={item.path}>{item.title}</SC.StyledLink>
+}
+
+function flatten([
+  currNode,
+  ...previousNodes
+]: IFileOrFolder[]): IFileOrFolder[] {
+  if (currNode.type === "file") {
+    return [...previousNodes, currNode]
+  }
+
+  return flatten([...currNode.children, ...previousNodes, currNode])
+}
+
+export function ResourceBreadcrumb({ relativePath }: ResourceBreadcrumbProps) {
+  const paths = relativePath.split("/")
+  const breadcrumbItems = flatten([traversePaths(paths)])
+
+  return (
+    <SC.ResourceBreadcrumbWrapper>
+      {breadcrumbItems.map(item => {
+        if (item.type === "folder") {
+          return (
+            <SC.LinkWrapper>
+              <Link item={item} />
+              <ChevronUp />
+            </SC.LinkWrapper>
+          )
+        }
+
+        return <SC.CurrentPage>{item.title}</SC.CurrentPage>
+      })}
+    </SC.ResourceBreadcrumbWrapper>
+  )
+}
diff --git a/src/components/ResourceBreadcrumb/styles.tsx b/src/components/ResourceBreadcrumb/styles.tsx
new file mode 100644
index 0000000..3c7f8e5
--- /dev/null
+++ b/src/components/ResourceBreadcrumb/styles.tsx
@@ -0,0 +1,38 @@
+import styled from "styled-components"
+import { Link } from "gatsby"
+
+export const ResourceBreadcrumbWrapper = styled.div`
+  display: flex;
+  align-items: flex-start;
+`
+
+export const LinkWrapper = styled.div`
+  display: flex;
+  align-items: center;
+  height: 30px;
+
+  svg {
+    width: 12px;
+    transform: rotate(90deg);
+    margin: 6px;
+  }
+
+  svg path {
+    fill: #04b0a6;
+  }
+`
+
+export const StyledLink = styled(Link)`
+  color: #04b0a6;
+  cursor: pointer;
+
+  &:hover {
+    color: #045551;
+  }
+`
+
+export const CurrentPage = styled.div`
+  display: flex;
+  align-items: center;
+  height: 30px;
+`
diff --git a/src/components/ResourceHeader/index.tsx b/src/components/ResourceHeader/index.tsx
index 4a6eecf..8faf276 100644
--- a/src/components/ResourceHeader/index.tsx
+++ b/src/components/ResourceHeader/index.tsx
@@ -2,9 +2,11 @@ import React, { Fragment } from "react"
 
 import { StackedAvatars } from "../StackedAvatars"
 import ChevronUp from "../../icons/chevron-up.svg"
+import { ResourceBreadcrumb } from "../ResourceBreadcrumb"
 import * as SC from "./styles"
 
 interface ResourceHeaderProps {
+  relativePath: any
   title: any
   authors: any
   createdAt: any
@@ -42,6 +44,7 @@ function ExtraLink({
 }
 
 export function ResourceHeader({
+  relativePath,
   title,
   authors,
   createdAt,
@@ -57,6 +60,8 @@ export function ResourceHeader({
 
   return (
     <SC.ResourceHeaderWrapper>
+      <ResourceBreadcrumb relativePath={relativePath} />
+
       <SC.Title>{title}</SC.Title>
 
       <SC.Top>
diff --git a/src/components/ResourceHeader/styles.tsx b/src/components/ResourceHeader/styles.tsx
index a73fbe1..30293b8 100644
--- a/src/components/ResourceHeader/styles.tsx
+++ b/src/components/ResourceHeader/styles.tsx
@@ -18,6 +18,7 @@ export const Title = styled.h1`
   font-size: ${modularScale(6).fontSize}px;
   line-height: ${modularScale(6).lineHeight}px;
   letter-spacing: -1.75px;
+  margin-top: 0;
 `
 
 export const Meta = styled.div`
diff --git a/src/components/ResourcesSidebar/useBuildTree.tsx b/src/components/ResourcesSidebar/useBuildTree.tsx
index 7108fe8..201ff4f 100644
--- a/src/components/ResourcesSidebar/useBuildTree.tsx
+++ b/src/components/ResourcesSidebar/useBuildTree.tsx
@@ -1,6 +1,7 @@
 import partition from "ramda/es/partition"
 import chain from "ramda/es/chain"
 
+import { traversePaths } from "../../utils"
 import {
   IFileOrFolder,
   IFile,
@@ -9,29 +10,6 @@ import {
   IFileQuery,
 } from "./index"
 
-function traverse(
-  [head, ...tail]: string[],
-  basePath = "/resources"
-): IFileOrFolder {
-  const path = basePath + "/" + head
-  const isFile = !tail.length
-  if (isFile) {
-    // probably not more than one dot
-    const [name] = head.split(".")
-    return {
-      title: name,
-      type: "file",
-      path,
-    }
-  }
-  return {
-    title: head,
-    type: "folder",
-    path,
-    children: [traverse(tail, path)],
-  }
-}
-
 function generateFolder({
   title,
   path,
@@ -85,7 +63,7 @@ function join([head, ...tail]: IFileOrFolder[]): IFileOrFolder[] {
 
 export default function useBuildTree(resources: IAllResourcesQuery) {
   const objects = resources.allFile.edges.map(({ node: file }: IFileQuery) =>
-    traverse(file.relativePath.split("/"))
+    traversePaths(file.relativePath.split("/"))
   )
 
   return join(objects)
diff --git a/src/templates/languagePost.tsx b/src/templates/languagePost.tsx
index c5f1f5d..ca907b2 100644
--- a/src/templates/languagePost.tsx
+++ b/src/templates/languagePost.tsx
@@ -6,12 +6,14 @@ import { ResourceHeader } from "../components/ResourceHeader"
 
 // @todo maybe find alternative type for data
 function LanguagePost({ data }: any) {
+  const { relativePath } = data.file
   const { html, fields, frontmatter, timeToRead } = data.file.post
   console.log(data)
   return (
     <Fragment>
       <SEO title={frontmatter.title} />
       <ResourceHeader
+        relativePath={relativePath}
         title={frontmatter.title}
         authors={fields.authors}
         createdAt={frontmatter.created_at}
@@ -29,6 +31,7 @@ export default LanguagePost
 export const query = graphql`
   query LanguagePost($file: String!) {
     file(relativePath: { eq: $file }) {
+      relativePath
       post: childMarkdownRemark {
         html
         fields {
diff --git a/src/utils/index.ts b/src/utils/index.ts
new file mode 100644
index 0000000..6aede7e
--- /dev/null
+++ b/src/utils/index.ts
@@ -0,0 +1,24 @@
+import { IFileOrFolder } from "../components/ResourcesSidebar/index"
+
+export function traversePaths(
+  [head, ...tail]: string[],
+  basePath = "/resources"
+): IFileOrFolder {
+  const path = basePath + "/" + head
+  const isFile = !tail.length
+  if (isFile) {
+    // probably not more than one dot
+    const [name] = head.split(".")
+    return {
+      title: name,
+      type: "file",
+      path,
+    }
+  }
+  return {
+    title: head,
+    type: "folder",
+    path,
+    children: [traversePaths(tail, path)],
+  }
+}