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{command,id,book:book&&decodeURIComponent(book),slug:slug&&decodeURIComponent(slug).toLowerCase()};\n  }\n}\n\nmodule.exports = UrlManager;\n","function makeId(len = 5) {\n  var text = \"\";\n  var possible = \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\";\n\n  for (var i = 0; i < len; i++)\n    text += possible.charAt(Math.floor(Math.random() * possible.length));\n\n  return text;\n}\n\nmodule.exports = makeId;\n","const makeId = require(\"./makeId.js\");\n\nclass LocalStorage {\n  // TODO: fix LocalStorage requires Book\n  constructor(Book) {\n    this.Book = Book;\n    if (localStorage.bookList) {\n      this.bookList = JSON.parse(localStorage.bookList);\n    } else {\n      this.bookList = [];\n      this.buildBookList();\n    }\n  }\n\n  pack(data) {\n    var pagesStr = JSON.stringify(data.pages);\n    const book = {\n      name: data.name,\n      pages: data.pages,\n      pageCount: Object.keys(data.pages).length,\n      size: pagesStr.length,\n      id: data.id\n    };\n    return book;\n  }\n\n  unpack(data) {\n    data.canEdit = true;\n    return data;\n  }\n\n  load(id) {\n    return new Promise((resolve, reject) => {\n      var str = localStorage[\"book/\"+id];\n      if (!str) {\n        reject(new Error(`Couldn't load book ${id}`));\n      } else {\n        resolve(this.unpack(JSON.parse(str)));\n      }\n    });\n  }\n\n  // TODO: Saving someone else's book creates a new book but doesn't redirect\n  save(name, json) {\n    return new Promise(resolve => {\n      json.id = json.id || makeId();\n\n      const book = this.pack(json);\n\n      this.bookList = this.bookList.filter(bl => bl.id != json.id);\n\n      this.bookList.push({\n        name: book.name,\n        created: book.created || firebase.firestore.Timestamp.now(),\n        pageCount: book.pageCount,\n        size: book.size,\n        id: json.id\n      });\n\n      localStorage.bookList = JSON.stringify(this.bookList);\n      localStorage[\"book/\" + json.id] = JSON.stringify(book);\n      resolve();\n    });\n  }\n\n  getAllBooks() {\n    return new Promise(resolve => {\n      resolve(this.bookList);\n    });\n  }\n\n  saveBookList() {\n    localStorage.bookList = JSON.stringify(this.bookList);\n  }\n\n  deleteBook(json) {\n    this.bookList = this.bookList.filter(bl => bl.id != json.id);\n    delete localStorage[\"book/\"+json.id];\n    this.saveBookList();\n    return new Promise(resolve => resolve());\n  }\n\n  deleteAllBooks() {\n    this.bookList = [];\n    this.saveBookList();\n  }\n\n  // TODO: remove buildBookList() once Jesse's books are imported?\n  buildBookList() {\n    console.log(\"Undeleting books...\");\n    Object.keys(localStorage)\n    .filter(key => key.startsWith(\"book/\"))\n    .map(key => {\n      let json = JSON.parse(localStorage[key]);\n      json.pages = undefined;\n      this.bookList.push(json);\n    });\n    this.saveBookList();\n  }\n\n}\n\nmodule.exports = LocalStorage;\n","// https://stackoverflow.com/questions/1349404/generate-random-string-characters-in-javascript\n\nconst makeId = require('./makeId.js');\n\nclass Firestore {\n\n  constructor() {\n    this.db = firebase.firestore();\n\n    // Disable deprecated features\n    this.db.settings({\n      timestampsInSnapshots: true\n    });\n  }\n\n  pack(data) {\n    var pagesStr = JSON.stringify(data.pages);\n    const book = {\n      name: data.name,\n      pages: pagesStr,\n      created:  firebase.firestore.FieldValue.serverTimestamp(),\n      pageCount: Object.keys(data.pages).length,\n      size: pagesStr.length,\n      owner: firebase.auth().currentUser.uid,\n      id: data.id\n    };\n    return book;\n  }\n\n  unpack(data) {\n    let canEdit = false;\n    const user = firebase.auth().currentUser;\n    if (user) {\n      canEdit = (data.owner === user.uid);\n    }\n\n    if (data.json) {\n      console.log(\"Loading old format\");\n      const json = JSON.parse(data.json);\n      json.canEdit = canEdit;\n      return json;\n    } else if (data.pages) {\n      console.log(\"Loading new format\");\n      data.pages = JSON.parse(data.pages);\n      data.canEdit = canEdit;\n      return data;\n    } else {\n      throw(new Error(\"Can't read data\"));\n    }\n  }\n\n  load(id) {\n    return new Promise((resolve,reject) => {\n      this.db.collection(\"books\").doc(id).get()\n      .then(doc => {\n        if (doc.exists) {\n          const book = this.unpack(doc.data());\n          resolve(book);\n        } else {\n          reject(\"Book doesn't exist\");\n        }\n      })\n      .catch(err => {\n        reject(err);\n      });\n    });\n  }\n\n  // TODO: handle id collisions\n\n  save(name, json) {\n    return new Promise((resolve, reject) => {\n      this.singleAttemptSave(name, json)\n      .then(() => {\n        resolve();\n      })\n      .catch(err => {\n\n        if (err.code === \"permission-denied\") {\n\n          // Retry the save with a different id\n          // It's statistically impossible to get an id collision twice in a row\n          // so if it fails a second time something else is wrong\n\n          // singleAttemptSave() will give us a new id\n          delete json.id;\n\n          this.singleAttemptSave(name, json)\n          .then(() => {\n            resolve();\n          })\n          .catch(err => {\n            reject(err);\n          });\n        } else reject(err);\n      });\n    });\n  }\n\n  singleAttemptSave(name, json) {\n    const user = firebase.auth().currentUser;\n    if (!user) {\n      throw(\"Must be logged in to save\");\n    }\n\n    json.id = json.id || makeId();\n    json.name = name;\n    const id = json.id;\n\n    const book = this.pack(json);\n\n    // Get a new write batch\n    const batch = this.db.batch();\n\n    // save the booklisting\n    const bookListingRef = this.db.collection(\"booklistings\").doc(id);\n    batch.set(bookListingRef, {\n      name: book.name,\n      created: book.created,\n      owner: book.owner,\n      pageCount: book.pageCount,\n      size: book.size\n    });\n\n    // save the book\n    const bookRef = this.db.collection(\"books\").doc(id);\n    batch.set(bookRef, book);\n\n    // Commit the batch\n    return batch.commit();\n  }\n\n  deleteBook(json) {\n    const batch = this.db.batch();\n\n    // save the booklisting\n    const bookListingRef = this.db.collection(\"booklistings\").doc(json.id);\n    batch.delete(bookListingRef);\n\n    // save the book\n    const bookRef = this.db.collection(\"books\").doc(json.id);\n    batch.delete(bookRef);\n\n    // Commit the batch\n    return batch.commit();\n  }\n\n  getAllBooks() {\n    return new Promise((resolve) => {\n      this.db.collection(\"booklistings\")\n        .where(\"owner\", \"==\", firebase.auth().currentUser.uid)\n          .get()\n          .then((querySnapshot) => {\n            let ret = [];\n\n            // TODO: sort books by time created\n            querySnapshot.forEach((doc) => {\n              let booklisting = doc.data();\n              booklisting.id = doc.id;\n              ret.push(booklisting);\n            });\n            resolve(ret);\n          });\n        });\n  }\n}\n\nmodule.exports = Firestore;\n","const UrlManager = require(\"./UrlManager.js\");\nconst LocalStorage = require(\"./LocalStorage.js\");\nconst Firestore = require(\"./Firestore.js\");\n\nconst localStorageDB = new LocalStorage(Book);\nconst firestoreDB = new Firestore(Book);\n\nconst urlManager = new UrlManager();\n\nconst startMessage = \"\";\n\nclass Book {\n  constructor(id, name) {\n    // TODO: handle confusion of having name here and in json.name\n    this.id = id;\n    this.name = name;\n    this.loaded = false;\n\n    this.json = {\n      name: name,\n      pages: { \"start\": startMessage }\n    };\n  }\n  static list(currentUser) {\n    const storage = currentUser ? firestoreDB : localStorageDB;\n    return new Promise(resolve => {\n      storage.getAllBooks().then(booklistings => {\n        booklistings = booklistings.sort((a,b) => a.created < b.created ? 1 : -1);\n        resolve(booklistings.map(l => new Book(l.id, l.name)));\n      });\n\n    });\n  }\n  setPageText(pageName, text) {\n    if (!text) {\n      delete this.json.pages[pageName];\n      if (pageName === \"start\") {\n        this.json.pages[pageName] = startMessage;\n      }\n    } else {\n      this.json.pages[pageName] = text;\n    }\n    return this.json.pages[pageName] !== undefined;\n  }\n  getPageText(pageName) {\n    return this.json.pages[pageName] || \"\";\n  }\n  textToHtml(text) {\n    return text.replace(/\\[([^\\[\\]]+)\\](?:\\((.*?)\\))?/g, (m,description,title) => {\n      title = title || description;\n      return \"<a href='\"+urlManager.fromBookAndPage(this,title)+\"'>\"+description+\"</a>\";\n    });\n  }\n  getPageHtml(pageName) {\n    return this.textToHtml(this.getPageText(pageName));\n  }\n  getPageHeader(pageName) {\n    if (!pageName || pageName === \"start\") {\n      return this.name;\n    }\n    return pageName;\n  }\n  listPages() {\n    return Object.keys(this.json.pages);\n  }\n  load() {\n    return new Promise((resolve) => {\n      this.loadWithStorage(localStorageDB)\n      .then(resolve)\n      .catch(() => {\n        console.log(\"Loading from db\");\n        this.loadWithStorage(firestoreDB)\n        .then(resolve);\n      });\n    });\n  }\n\n  delete(currentUser) {\n    const storage = currentUser ? firestoreDB : localStorageDB;\n    return storage.deleteBook(this.json);\n  }\n\n  loadWithStorage(storage) {\n\n    return storage.load(this.id)\n      .then(json => {\n        this.id = json.id;\n        this.name = json.name;\n        this.json = json;\n        this.loaded = true;\n        this.canEdit = json.canEdit;\n      });\n  }\n\n  save(currentUser) {\n    const storage = currentUser ? firestoreDB : localStorageDB;\n    return storage.save(this.name, this.json)\n    .then(() => {\n      this.id = this.json.id;\n    });\n  }\n\n  static transferAnyLocalBooks(currentUser) {\n    localStorageDB.getAllBooks().then(books => {\n      books = books.map(booklisting => new Book(booklisting.id, booklisting.name));\n      if (books.length) {\n        localStorageDB.deleteAllBooks();\n        console.log(\"Transferring books to server\",books);\n        books.forEach(book => {\n          book.loadWithStorage(localStorageDB).then(() => book.save(currentUser));\n        });\n      }\n    });\n  }\n}\n\nmodule.exports = Book;\n","/* global firebaseui */\n\nclass Auth {\n  constructor() {\n    // Initialize the FirebaseUI Widget using Firebase.\n    this.ui = new firebaseui.auth.AuthUI(firebase.auth());\n\n    // FirebaseUI config.\n    var uiConfig = {\n      callbacks: { signInSuccessWithAuthResult: () => { this.loginPending = false; } },\n      credentialHelper: firebaseui.auth.CredentialHelper.NONE,\n      signInFlow: \"redirect\",\n      signInOptions: [\n        {\n          provider: firebase.auth.GoogleAuthProvider.PROVIDER_ID,\n          customParameters: {\n            prompt: 'select_account'\n          }\n        },\n        {\n          provider: firebase.auth.EmailAuthProvider.PROVIDER_ID,\n          customParameters: {\n            requireDisplayName: false\n          }\n        }\n      ],\n      tosUrl: '<your-tos-url>',\n      privacyPolicyUrl: '<your-privacy-policy-url>'\n    };\n\n    this.uiConfig = uiConfig;\n\n    this.loginPending = this.ui.isPendingRedirect();\n    if (this.ui.isPendingRedirect()) {\n      // Calling ui.start() here doesn't actually show the UI;\n      // It clears the isPendingRedirect flag, and starts doing whatever\n      // magic it does to process the actual federated login. When it's\n      // done the signInSuccessWithAuthResult() callback will be called,\n      // and then the onAuthStateChanged() callback\n      this.signIn();\n    }\n\n  }\n\n  onChange(fn) {\n    firebase.auth().onAuthStateChanged(user => {\n      let ret = !!user;\n      if (this.loginPending) {\n        ret = undefined;\n      }\n      fn(ret, user);\n    });\n  }\n\n  signIn() {\n    this.ui.start('#firebaseui-auth-container', this.uiConfig);\n  }\n\n  signOut() {\n    firebase.auth().signOut();\n  }\n\n  currentUser() {\n    return firebase.auth().currentUser;\n  }\n}\n\nmodule.exports = Auth;\n","function isMobileSafari() {\n  return /iP(ad|hone|od).+Version\\/[\\d\\.]+.*Safari/i.test(navigator.userAgent);\n}\n\nfunction enhanceTextarea(ta, cb) {\n  let el = ta.get(0);\n\n  // we need box-sizing: border-box, if the textarea has padding\n  el.style.boxSizing = el.style.mozBoxSizing = 'border-box';\n\n  // we don't need any scrollbars, do we? :)\n  el.style.overflowY = 'hidden';\n\n  let clone = el.cloneNode();\n  $(clone).css({position:\"absolute\",width: el.scrollWidth, top: -1000}).attr(\"disabled\", true);\n  // $(clone).css({position:\"absolute\",top:-1000}).attr(\"disabled\", true);\n  el.parentNode.appendChild(clone);\n\n  // the minimum height initiated through the \"rows\" attribute\n  var minHeight = el.scrollHeight;\n\n  // Adapted from http://bdadam.com/blog/automatically-adapting-the-height-textarea.html\n  // Added a clone to fix scrolling weirdness\n  function adjustHeight(textareaElement, minHeight) {\n    clone.value = el.value;\n    var outerHeight = parseInt(window.getComputedStyle(clone).height, 10);\n    var diff = outerHeight - clone.clientHeight;\n\n    // set the correct height\n    // el.scrollHeight is the full height of the content, not just the visible part\n    let newHeight = Math.max(minHeight, clone.scrollHeight + diff);\n    // if (newHeight!=outerHeight)\n    el.style.height = newHeight + 'px';\n  }\n\n  function getCursorY(el) {\n    const pos = $(el).prop(\"selectionStart\");\n    clone.value = el.value.slice(0,pos);\n    return clone.scrollHeight;\n  }\n\n  function scrollToCursor(el) {\n    const elY = getCursorY(el);\n    const pageY = elY + $(el).offset().top;\n    const screenY = pageY - window.window.scrollY;\n\n    if (screenY < 50 || screenY > window.innerHeight/2.5) {\n      window.scrollTo(window.scrollX, $(el).offset().top + getCursorY(el) - window.innerHeight/3);\n    }\n  }\n\n\n  ta\n  .unbind()\n  .on(\"input propertychange resize\", function() {\n    adjustHeight(el, minHeight);\n  })\n  .on(\"keydown\", function(e) {\n    if ((e.keyCode === 13 && e.shiftKey) // shift+return\n      ||\n      (e.key === \"s\" && e.metaKey) // cmd+s\n      ||\n      (e.key === \"s\" && e.ctrlKey)) // ctrl+s\n    {\n      cb;\n      e.preventDefault();\n      return true;\n    }\n  })\n  .on(\"blur\", () => {\n    // savePage(book, pageName);\n  });\n\n  if (isMobileSafari()) {\n    ta\n    .on(\"keyup click propertychange\", function () {\n      scrollToCursor(el, minHeight);\n    });\n  }\n\n    // we adjust height to the initial content\n    adjustHeight(el, minHeight);\n  ta.focus();\n}\n\n\nmodule.exports = enhanceTextarea;\n","\nconst UrlManager = require(\"./UrlManager.js\");\nconst Book = require(\"./Book.js\");\nconst Auth = require(\"./Auth.js\");\nconst enhanceTextarea = require(\"./enhanceTextarea.js\");\n\n\nconst sitePages = {\n  \"\": \"#books/1STFV/getting-started/introduction\",\n};\n\n\n$(function () {\n  const urlManager = new UrlManager();\n\n  function router(listBooks, listPages, showPage) {\n    let book;\n\n    function handleHashChange() {\n      window.scrollTo(0,0);\n\n      let url = document.location.hash;\n\n      if (sitePages[url]) {\n        url = sitePages[url];\n      }\n      var parts = urlManager.getUrlParts(url);\n\n      if (parts.command !== \"books\") {\n        document.location.href = \"#books\";\n        return;\n      }\n\n      const handleBook = () => {\n        if (parts.slug) {\n          showPage(book, parts.slug);\n        } else {\n          listPages(book);\n        }\n      };\n\n      if (parts.id) {\n        if (book && book.loaded && book.id === parts.id) {\n          handleBook();\n          return;\n        }\n        book = new Book(parts.id, parts.book);\n        book.load().then(handleBook);\n      } else {\n        listBooks();\n      }\n\n\n    }\n\n    restoreScrollPositionOnBackButton();\n\n    window.onhashchange = handleHashChange;\n    handleHashChange();\n  }\n\n  let scrollPos = {x:window.scrollX, y:window.scrollY};\n\n  function restoreScrollPositionOnBackButton() {\n    $(\"body\").on(\"click\",\"a\",() => {\n      history.replaceState({x:window.scrollX, y:window.scrollY}, null, document.location.href);\n      return true;\n    });\n\n    window.onpopstate = (e) => {\n      scrollPos = e.state || {x:0, y:0};\n    };\n  }\n\n\n  function addBook() {\n    var title = prompt(\"What's the title of your book?\");\n    if (title) {\n      var book = new Book(null, title);\n      book.save(auth.currentUser()).then(() => {\n        console.log(\"Saved \"+book.json.id);\n        document.location.href = urlManager.fromBookAndPage(book,\"start\");\n      });\n    }\n  }\n\n  function editPage(book, pageName) {\n    $(\".cs-pageTitle\").text(book.getPageHeader(pageName));\n\n    $(\".cs-saveButton\").unbind().click(() => {\n      savePage(book, pageName);\n      return false;\n    });\n    $(\".cs-cancelButton\").unbind().click(() => {\n      if (book.getPageText(pageName)) {\n        showPage(book, pageName);\n      } else {\n        window.history.back();\n      }\n      return false;\n    });\n\n\n    let text = book.getPageText(pageName);\n\n    const textarea = $(\".cs-pageTextarea\");\n\n    textarea.val(text);\n    showPanel(\".cs-editPanel\");\n\n    enhanceTextarea(textarea, () => savePage(book, pageName));\n    textarea.focus();\n  }\n\n  function redirectIfNeeded(book, pageName) {\n    if (sitePages[document.location.hash]) {\n      return false;\n    }\n    const cannonicalUrl = urlManager.fromBookAndPage(book, pageName);\n    if (!document.location.href.endsWith(cannonicalUrl)) {\n      console.log(\"Redirecting to \",cannonicalUrl);\n      return document.location.assign(cannonicalUrl);\n    }\n  }\n\n  function showPanel(className) {\n    $(\".cs-page\").show();\n    $(\".cs-panel\").hide();\n    $(className).show();\n    window.scrollTo(scrollPos.x, scrollPos.y);\n  }\n\n\n  function showPage(book, pageName) {\n    redirectIfNeeded(book, pageName);\n\n    var html = book.getPageHtml(pageName);\n    if (!html) {\n      editPage(book, pageName);\n      return;\n    }\n\n    let tocText = book.name;\n    if (pageName === \"start\") {\n      tocText = \"Table of Contents\";\n    }\n    $(\".cs-TOCLink\").text(tocText).attr(\"href\",urlManager.fromBookAndPage(book));\n    $(\".cs-pageTitle\").text(book.getPageHeader(pageName));\n    $(\".cs-pageText\").html(html);\n    $(\".cs-editButton\").unbind().click(() => {\n      editPage(book, pageName);\n      return false;\n    });\n\n    showPanel(\".cs-readPanel\");\n  }\n\n  function listPages(book) {\n    redirectIfNeeded(book);\n\n    $(\".cs-bookTitle\").text(book.name);\n    $(\".cs-deleteBookButton\").toggle(book.canEdit);\n\n    var ol = $(\".cs-pageList\").html(\"\");\n    book.listPages().forEach(function (name) {\n      let a = $(\"<a>\").attr(\"href\", urlManager.fromBookAndPage(book,name)).text(name);\n      ol.append($(\"<li>\").append(a));\n    });\n\n    $(\".cs-deleteBookButton\").unbind().click(() => {\n      const confirmed = confirm(`Are you sure you want to delete the book \"${book.name}\"?`);\n      if (confirmed) {\n        book.delete(auth.currentUser()).then(() => document.location.assign(\"#books\"));\n      }\n      return false;\n    });\n\n    showPanel(\".cs-listPagesPanel\");\n  }\n\n  function listBooks() {\n    Book.list(auth.currentUser()).then(books => {\n      var ul = $(\".cs-bookList\").html(\"\");\n      $(\".cs-noBooksAlert\").toggle(books.length === 0);\n      books.forEach(book => {\n        let a = $(\"<a>\").attr(\"href\", urlManager.fromBookAndPage(book)).text(book.name);\n        ul.append($(\"<li>\").append(a));\n      });\n      showPanel(\".cs-listBooksPanel\");\n    });\n    $(\".cs-newBookButton\").unbind().click(() => {\n      addBook();\n      return false;\n    });\n  }\n\n  function savePage(book, pageName) {\n    // TODO: explicitly pass textarea value to savePage()\n    let newText = $(\"textarea\").val();\n\n    if (newText === book.getPageText(pageName)) {\n      showPage(book, pageName);\n      return;\n    }\n\n    const hasText = book.setPageText(pageName,newText);\n\n    // TODO: hide write latency?\n    book.save(auth.currentUser())\n    .then(() => {\n      if (hasText) {\n        showPage(book, pageName);\n      } else {\n        window.history.back();\n        // listPages(book);\n      }\n    });\n  }\n\n\n  const auth = new Auth();\n  auth.onChange((signedIn) => {\n    $(\".cs-signIn\").toggle(signedIn === false);\n    $(\".cs-signOut\").toggle(signedIn === true);\n    $(\".cs-signingIn\").toggle(signedIn === undefined);\n  });\n  $(() => {\n    $(\".cs-signIn\").click(() => {\n      $('#cs-authModal').modal();\n      auth.signIn();\n      return false;\n    });\n\n    $(\".cs-signOut\").click(() => {\n      auth.signOut();\n      return false;\n    });\n  });\n\n  auth.onChange((signedIn) => {\n    $('#cs-authModal').modal('hide');\n    if (signedIn != undefined) {\n      if (signedIn) {\n        Book.transferAnyLocalBooks(auth.currentUser());\n      }\n      router(listBooks, listPages, showPage);\n    }\n  });\n\n});\n"]}