.gitlab-ci.yml

 # This base image can be found in 'Dockerfile'
-image: zesje/base
+image: gitlab.kwant-project.org:5005/zesje/zesje/test:latest
 
 stages:
   - build
@@ -13,11 +13,13 @@ stages:
     paths:
       - .yarn-cache
   before_script:
+    - source activate zesje-dev
     - yarn install --cache-folder .yarn-cache
 
 .python_packages: &python_packages
   before_script:
-    - pip install --no-cache-dir -r requirements.txt -r requirements-dev.txt
+    - source activate zesje-dev
+    - conda env update
 
 build:
   <<: *node_modules

Dockerfile

-FROM archlinux/base
+FROM continuumio/miniconda3
 
-## Install packages and clear the cache after installation. Yarn is fixed at 1.6.0 untill 1.8.0 is released due to a critical bug.
-RUN pacman -Sy --noconfirm nodejs python-pip git libdmtx libsm libxrender libxext gcc libmagick6 imagemagick ghostscript; \
-    pacman -U --noconfirm https://archive.archlinux.org/packages/y/yarn/yarn-1.6.0-1-any.pkg.tar.xz
+RUN apt-get update -y && apt-get install -y libdmtx0a libmagickwand-dev
 
-WORKDIR ~
-ADD requirements*.txt ./
-#ADD package.json .
-RUN pip install --no-cache-dir -r requirements.txt -r requirements-dev.txt;
-#RUN yarn install; \
-#    yarn cache clean; \
-#    rm package.json
+RUN apt-get update && \
+    apt-get install -y \
+        curl \
+        poppler-utils build-essential libgl1-mesa-glx \
+        imagemagick libsm-dev libdmtx-dev libdmtx0a libmagickwand-dev \
+        && \
+    apt-get -y --quiet install git supervisor nginx
 
-CMD bash
\ No newline at end of file
+WORKDIR /app
+
+ADD environment.yml /app/environment.yml
+RUN conda env create
+
+# From https://medium.com/@chadlagore/conda-environments-with-docker-82cdc9d25754
+RUN echo "source activate $(head -1 /app/environment.yml | cut -d' ' -f2)" > ~/.bashrc
+ENV PATH /opt/conda/envs/$(head -1 /app/environment.yml | cut -d' ' -f2)/bin:$PATH
+
+RUN rm /app/environment.yml
+
+CMD bash

README.md

@@ -15,10 +15,11 @@ Install Miniconda by following the instructions on this page:
 
 https://conda.io/miniconda.html
 
-Create a Conda environment that you will use for installing all
-of zesje's dependencies:
+Make sure you cloned this repository and enter its directory. Then 
+create a Conda environment that will automatically install all 
+of zesje's Python dependencies:
 
-    conda create -c conda-forge -n zesje-dev python=3.6 yarn
+    conda env create  # Creates an environment from environment.yml 
 
 Then, *activate* the conda environment:
 
@@ -31,10 +32,6 @@ Install all of the Javascript dependencies:
 
     yarn install
 
-Install all of the Python dependencies:
-
-    pip install -r requirements.txt -r requirements-dev.txt
-
 Unfortunately there is also another dependency that must be installed
 manually for now (we are working to bring this dependency into the
 Conda ecosystem). You can install this dependency in the following way
@@ -145,10 +142,10 @@ If you use Atom, install the [linter-js-standard-engine](https://atom.io/package
 ### Adding dependencies
 
 #### Server-side
-If you start using a new Python library, be sure to add it to `requirements.txt`. Python libraries for the testing are in `requirements-dev.txt`.
-The packages can be installed and updated in your environment by `pip` using
+If you start using a new Python library, be sure to add it to `environment.yml`.
+The packages can be installed and updated in your environment by `conda` using
 
-    pip install -r requirements.txt -r requirements-dev.txt
+    conda env update
 
 
 #### Client-side

barcode_example_generator.py

+
+import sys
+import os
 from io import BytesIO
 
 from reportlab.pdfgen import canvas
-import PIL
 from wand.image import Image
 from wand.color import Color
-from pystrich.datamatrix import DataMatrixEncoder
 
+sys.path.append(os.getcwd())
 
-def generate_datamatrix(exam_id, page_num, copy_num):
-    data = f'{exam_id}/{copy_num:04d}/{page_num:02d}'
+from zesje.pdf_generation import generate_datamatrix  # noqa: E402
+from zesje.database import token_length  # noqa: E402
 
-    image_bytes = DataMatrixEncoder(data).get_imagedata(cellsize=2)
-    return PIL.Image.open(BytesIO(image_bytes))
 
+exam_token = "A" * token_length
+copy_num = 1559
+page_num = 0
 
-datamatrix = generate_datamatrix(0, 0, 0)
-datamatrix_x = datamatrix_y = 0
-fontsize = 8
-margin = 3
+fontsize = 12
+datamatrix_x = 0
+datamatrix_y = fontsize
 
-datamatrix = generate_datamatrix(0, 0, 0000)
-imagesize = (datamatrix.width, 3 + fontsize + datamatrix.height)
+datamatrix = generate_datamatrix(exam_token, page_num, copy_num)
+imagesize = (datamatrix.width, fontsize + datamatrix.height)
 
 result_pdf = BytesIO()
 canv = canvas.Canvas(result_pdf, pagesize=imagesize)
 
-canv.drawInlineImage(datamatrix, 0, 3 + fontsize)
+canv.drawInlineImage(datamatrix, datamatrix_x, datamatrix_y)
 
 canv.setFont('Helvetica', fontsize)
-canv.drawString(0, 3, f"  # 1519")
+canv.drawString(datamatrix_x, datamatrix_y - (fontsize * 0.66),
+                f" # {copy_num}")
 
 canv.showPage()
 canv.save()
@@ -36,7 +39,7 @@ canv.save()
 result_pdf.seek(0)
 
 # From https://stackoverflow.com/questions/27826854/python-wand-convert-pdf-to-png-disable-transparent-alpha-channel
-with Image(file=result_pdf, resolution=80) as img:
-    with Image(width=img.width, height=img.height, background=Color("white")) as bg:
+with Image(file=result_pdf, resolution=72) as img:
+    with Image(width=imagesize[0], height=imagesize[1], background=Color("white")) as bg:
         bg.composite(img, 0, 0)
         bg.save(filename="client/components/barcode_example.png")

client/components/PaneMCQ.jsx

 import React from 'react'
+import Switch from 'react-bulma-switch/full'
+import './PanelMCQ.css'
 
 /**
- * PanelMCQ is a component that allows the user to generate mcq options
+ * PanelMCQ is a component that allows the user to generate mc questions and options
  */
 class PanelMCQ extends React.Component {
   constructor (props) {
@@ -9,23 +11,72 @@ class PanelMCQ extends React.Component {
     this.onChangeNPA = this.onChangeNPA.bind(this)
     this.onChangeLabelType = this.onChangeLabelType.bind(this)
     this.generateLabels = this.generateLabels.bind(this)
+    this.updateNumberOptions = this.updateNumberOptions.bind(this)
+
     this.state = {
-      chosenLabelType: 0,
+      chosenLabelType: 2,
       nrPossibleAnswers: 2,
       labelTypes: ['None', 'True/False', 'A, B, C ...', '1, 2, 3 ...']
     }
   }
 
+  // modify the state if the properties are changed
+  static getDerivedStateFromProps (newProps, prevState) {
+    // if another problem is selected, update the state and implicitly the contents of the inputs
+    if (prevState.problemId !== newProps.problem.id) {
+      let prob = newProps.problem
+      return {
+        problemId: prob.id,
+        nrPossibleAnswers: prob.mc_options.length || 2,
+        chosenLabelType: PanelMCQ.deriveLabelType(prob.mc_options)
+      }
+    }
+
+    return null
+  }
+
+  /**
+   * Derive the label type given an array of options.
+   * @param options the options that correspond to a problem
+   * @returns {number} the index in the labelTypes array representing the label type
+   */
+  static deriveLabelType (options) {
+    if (options.length === 0) {
+      return 2
+    } else if (options.length === 2 && ((options[0].label === 'T' && options[1].label === 'F') ||
+      (options[0].label === 'F' && options[1].label === 'T'))) {
+      return 1
+    } else if (options[0].label.match(/[A-Z]/)) {
+      return 2
+    } else if (parseInt(options[0].label)) {
+      return 3
+    } else {
+      return 0
+    }
+  }
+
+  // this functions calculates
+  updateNumberOptions () {
+    let difference = this.state.nrPossibleAnswers - this.props.problem.mc_options.length
+    if (difference > 0) {
+      let startingAt = this.props.problem.mc_options.length
+      let labels = this.generateLabels(difference, startingAt)
+      return this.props.generateMCOs(labels)
+    } else if (difference < 0) {
+      return this.props.deleteMCOs(-difference)
+    }
+  }
+
   // this function is called when the input is changed for the number of possible answers
   onChangeNPA (e) {
     let value = parseInt(e.target.value)
-    if (!isNaN(value)) {
+    if (!isNaN(value) && value <= this.props.totalNrAnswers) {
       if (this.state.chosenLabelType === 1) {
         value = 2
       }
       this.setState({
         nrPossibleAnswers: value
-      })
+      }, this.updateNumberOptions)
     }
   }
 
@@ -33,12 +84,22 @@ class PanelMCQ extends React.Component {
   onChangeLabelType (e) {
     let value = parseInt(e.target.value)
     if (!isNaN(value)) {
-      this.setState({
-        chosenLabelType: value
-      })
+      // if the label type is True/False then reduce the number of mc options to 2
       if (parseInt(value) === 1) {
         this.setState({
-          nrPossibleAnswers: 2
+          nrPossibleAnswers: 2,
+          chosenLabelType: value
+        }, () => {
+          this.updateNumberOptions()
+          let labels = this.generateLabels(this.state.nrPossibleAnswers, 0)
+          this.props.updateLabels(labels)
+        })
+      } else {
+        this.setState({
+          chosenLabelType: value
+        }, () => {
+          let labels = this.generateLabels(this.state.nrPossibleAnswers, 0)
+          this.props.updateLabels(labels)
         })
       }
     }
@@ -47,18 +108,20 @@ class PanelMCQ extends React.Component {
   /**
    * This function generates an array with the labels for each option
    * @param nrLabels the number of options that need to be generated
+   * @param startingAt at which number/character to start generating labels
    * @returns {any[]|string[]|number[]}
    */
-  generateLabels (nrLabels) {
+  generateLabels (nrLabels, startingAt) {
     let type = this.state.chosenLabelType
 
     switch (type) {
       case 1:
         return ['T', 'F']
       case 2:
-        return Array.from(Array(nrLabels).keys()).map((e) => String.fromCharCode(e + 65))
+        return Array.from(Array(nrLabels).keys()).map(
+          (e) => String.fromCharCode(e + 65 + startingAt))
       case 3:
-        return Array.from(Array(nrLabels).keys()).map(e => e + 1)
+        return Array.from(Array(nrLabels).keys()).map(e => String(e + 1 + startingAt))
       default:
         return Array(nrLabels).fill(' ')
     }
@@ -70,34 +133,29 @@ class PanelMCQ extends React.Component {
    */
   render () {
     return (
-      <nav className='panel'>
-        <p className='panel-heading'>
-          Multiple Choice Question
-        </p>
-        <div className='panel-block'>
-          <div className='field'>
-            <React.Fragment>
-              <label className='label'>Number possible answers</label>
-              <div className='control'>
-                {(function () {
-                  var optionList = []
-                  for (var i = 1; i <= this.props.totalNrAnswers; i++) {
-                    const optionElement = <option key={i} value={String(i)}>{i}</option>
-                    optionList.push(optionElement)
-                  }
-                  return (<div className='select is-hovered is-fullwidth'>
-                    <select value={this.state.nrPossibleAnswers} onChange={this.onChangeNPA}>{optionList}</select>
-                  </div>)
-                }.bind(this)())}
-              </div>
-            </React.Fragment>
-          </div>
+      <React.Fragment>
+        <div className='panel-block mcq-block'>
+          <label className='label'> Multiple choice </label>
+          <Switch color='info' outlined value={this.props.problem.mc_options.length > 0} onChange={(e) => {
+            if (e.target.checked) {
+              let npa = this.state.nrPossibleAnswers
+              let labels = this.generateLabels(npa, 0)
+              this.props.generateMCOs(labels)
+            } else {
+              this.props.deleteMCOs(this.props.problem.mc_options.length)
+            }
+          }} />
         </div>
-        <div className='panel-block'>
-          <div className='field'>
-            <React.Fragment>
-              <label className='label'>Answer boxes labels</label>
-              <div className='control'>
+        { this.props.problem.mc_options.length > 0 ? (
+          <React.Fragment>
+            <div className='panel-block mcq-block'>
+              <div className='inline-mcq-edit'>
+                <label>#</label>
+                <input type='number' value={this.state.nrPossibleAnswers} min='1'
+                  max={this.props.totalNrAnswers} className='input' onChange={this.onChangeNPA} />
+              </div>
+              <div className='inline-mcq-edit'>
+                <label>Labels</label>
                 <div className='select is-hovered is-fullwidth'>
                   {(function () {
                     var optionList = this.state.labelTypes.map(
@@ -113,32 +171,10 @@ class PanelMCQ extends React.Component {
                   }.bind(this)())}
                 </div>
               </div>
-            </React.Fragment>
-          </div>
-        </div>
-        <div className='panel-block field is-grouped'>
-          <button
-            disabled={this.props.disabledGenerateBoxes}
-            className='button is-link is-fullwidth'
-            onClick={() => {
-              let npa = this.state.nrPossibleAnswers
-              let labels = this.generateLabels(npa)
-              this.props.onGenerateBoxesClick(labels)
-            }}
-          >
-            Generate
-          </button>
-          <button
-            disabled={this.props.disabledDeleteBoxes}
-            className='button is-danger is-fullwidth'
-            onClick={() => {
-              this.props.onDeleteBoxesClick()
-            }}
-          >
-            Delete
-          </button>
-        </div>
-      </nav>
+            </div>
+          </React.Fragment>) : null
+        }
+      </React.Fragment>
     )
   }
 }

client/components/PanelMCQ.css

+.panel-block.mcq-block {
+    justify-content: space-between;
+}
+
+.mcq-block .inline-mcq-edit {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    flex-wrap: nowrap;
+}
+
+.mcq-block .inline-mcq-edit label {
+    margin-right: 4px;
+}
+
+.mcq-block .inline-mcq-edit:first-of-type {
+    margin-right: 20px;
+}
+
+.mcq-block input, .mcq-block .select {
+    max-width: 130px;
+}
\ No newline at end of file

client/components/feedback/EditPanel.jsx

@@ -2,6 +2,7 @@ import React from 'react'
 
 import ConfirmationModal from '../../components/ConfirmationModal.jsx'
 import * as api from '../../api.jsx'
+import Notification from 'react-bulma-notification'
 
 const BackButton = (props) => (
   <button className='button is-light is-fullwidth' onClick={props.onClick}>
@@ -116,6 +117,14 @@ class EditPanel extends React.Component {
           })
           this.props.goBack()
         })
+        .catch(err => {
+          err.json().then(res => {
+            Notification.error('Could not delete feedback' +
+              (res.message ? ': ' + res.message : ''))
+            // update to try and get a consistent state
+            this.props.goBack()
+          })
+        })
     }
   }
 

client/components/feedback/FeedbackPanel.jsx

@@ -18,18 +18,20 @@ class FeedbackPanel extends React.Component {
   }
 
   componentDidMount = () => {
-    this.props.bindShortcut(['up', 'k'], (event) => {
-      event.preventDefault()
-      this.prevOption()
-    })
-    this.props.bindShortcut(['down', 'j'], (event) => {
-      event.preventDefault()
-      this.nextOption()
-    })
-    this.props.bindShortcut(['space'], (event) => {
-      event.preventDefault()
-      this.toggleSelectedOption()
-    })
+    if (this.props.grading) {
+      this.props.bindShortcut(['up', 'k'], (event) => {
+        event.preventDefault()
+        this.prevOption()
+      })
+      this.props.bindShortcut(['down', 'j'], (event) => {
+        event.preventDefault()
+        this.nextOption()
+      })
+      this.props.bindShortcut(['space'], (event) => {
+        event.preventDefault()
+        this.toggleSelectedOption()
+      })
+    }
   }
 
   static getDerivedStateFromProps (nextProps, prevState) {
@@ -111,7 +113,7 @@ class FeedbackPanel extends React.Component {
             feedback={feedback} checked={this.props.grading && this.props.solution.feedback.includes(feedback.id)}
             editFeedback={() => this.props.editFeedback(feedback)} updateSubmission={this.props.updateSubmission}
             ref={(selectedFeedbackId === feedback.id) ? this.feedbackBlock : null} grading={this.props.grading}
-            selected={selectedFeedbackId === feedback.id} showIndex={this.props.showTooltips} index={index + 1} />
+            selected={selectedFeedbackId === feedback.id || feedback.highlight} showIndex={this.props.showTooltips} index={index + 1} />
         )}
         {this.props.grading &&
           <div className='panel-block'>

client/views/Exam.css

@@ -57,6 +57,10 @@ div.mcq-option img.mcq-box {
   background-color: hsla(171, 100%, 41%, 0.2)
 }
 
+.widget.selected .mcq-option:hover {
+    background-color: rgb(25, 149, 216);
+}
+
 .editor-side-panel {
   background: #fff;
   margin: 0.75em;

client/views/Exam.jsx

@@ -56,8 +56,7 @@ class Exams extends React.Component {
               return option
             }),
             widthMCO: 24,
-            heightMCO: 38,
-            isMCQ: problem.mc_options && problem.mc_options.length !== 0 // is the problem a mc question - used to display PanelMCQ
+            heightMCO: 38
           }
         }
       })
@@ -122,14 +121,26 @@ class Exams extends React.Component {
   }
 
   updateFeedbackAtIndex = (feedback, problemWidget, idx) => {
+    let fb = [...problemWidget.problem.feedback]
     if (idx === -1) {
-      problemWidget.problem.feedback.push(feedback)
+      fb.push(feedback)
     } else {
-      if (feedback.deleted) problemWidget.problem.feedback.splice(idx, 1)
-      else problemWidget.problem.feedback[idx] = feedback
+      if (feedback.deleted) fb.splice(idx, 1)
+      else fb[idx] = feedback
     }
-    this.setState({
-      widgets: this.state.widgets
+
+    this.setState(prevState => {
+      return {
+        widgets: update(prevState.widgets, {
+          [problemWidget.id]: {
+            'problem': {
+              'feedback': {
+                $set: fb
+              }
+            }
+          }
+        })
+      }
     })
   }
 
@@ -140,10 +151,6 @@ class Exams extends React.Component {
     })
   }
 
-  isProblemWidget = (widget) => {
-    return widget && this.state.widgets[widget].problem
-  }
-
   saveProblemName = () => {
     const changedWidgetId = this.state.changedWidgetId
     if (!changedWidgetId) return
@@ -234,8 +241,20 @@ class Exams extends React.Component {
           numPages={this.state.numPages}
           onPDFLoad={this.onPDFLoad}
           updateWidget={this.updateWidget}
-          updateMCWidget={this.updateMCWidget}
+          updateMCOsInState={this.updateMCOsInState}
           selectedWidgetId={this.state.selectedWidgetId}
+          highlightFeedback={(widget, feedbackId) => {
+            let index = widget.problem.feedback.findIndex(e => { return e.id === feedbackId })
+            let feedback = widget.problem.feedback[index]
+            feedback.highlight = true
+            this.updateFeedbackAtIndex(feedback, widget, index)
+          }}
+          removeHighlight={(widget, feedbackId) => {
+            let index = widget.problem.feedback.findIndex(e => { return e.id === feedbackId })
+            let feedback = widget.problem.feedback[index]
+            feedback.highlight = false
+            this.updateFeedbackAtIndex(feedback, widget, index)
+          }}
           selectWidget={(widgetId) => {
             this.setState({
               selectedWidgetId: widgetId
@@ -304,58 +323,63 @@ class Exams extends React.Component {
   }
 
   /**
-   * This function deletes the mc options coupled to a problem.
+   * This method generates MC options by making the right calls to the api and creating
+   * the widget object in the mc_options array of the corresponding problem.
+   * @param problemWidget the problem widget the mc options belong to
+   * @param labels the labels for the options
+   * @param index the index in the labels array (the function is recusive, this index is increased)
+   * @param xPos x position of the current option
+   * @param yPos y position of the current option
    */
-  deleteMCWidget = () => {
-    const widget = this.state.widgets[this.state.selectedWidgetId]
-    const options = widget.problem.mc_options
-    if (options.length > 0) {
-      options.forEach((option) => {
-        api.del('mult-choice/' + option.id)
-          .catch(err => {
-            console.log(err)
-            err.json().then(res => {
-              this.setState({
-                deletingMCWidget: false
-              })
-              Notification.error('Could not delete multiple choice option' +
-                (res.message ? ': ' + res.message : ''))
-              // update to try and get a consistent state
-              this.props.updateExam(this.props.examID)
-            })
-          }).then(res => {
-            let index = widget.problem.feedback.findIndex(e => { return e.id === res.feedback_id })
-            let feedback = widget.problem.feedback[index]
-            feedback.deleted = true
-            this.updateFeedbackAtIndex(feedback, widget, index)
-          })
-      })
+  generateMCOs = (problemWidget, labels, index, xPos, yPos) => {
+    if (labels.length === index) return
 
-      // remove the mc options from the state
-      // note that this can happen before they are removed in the DB due to async calls
-      this.setState((prevState) => {
-        return {
-          widgets: update(prevState.widgets, {
-            [widget.id]: {
-              problem: {
-                mc_options: {
-                  $set: []
-                }
-              }
-            }
-          }),
-          deletingMCWidget: false
-        }
-      })
+    let feedback = {
+      'name': labels[index],
+      'description': '',
+      'score': 0
+    }
+
+    let data = {
+      'label': labels[index],
+      'problem_id': problemWidget.problem.id,
+      'feedback_id': null,
+      'cbOffsetX': 7, // checkbox offset relative to option position on x axis
+      'cbOffsetY': 21, // checkbox offset relative to option position on y axis
+      'widget': {
+        'name': 'mc_option_' + labels[index],
+        'x': xPos,
+        'y': yPos,
+        'type': 'mcq_widget'
+      }
     }
+
+    const formData = new window.FormData()
+    formData.append('name', data.widget.name)
+    formData.append('x', data.widget.x + data.cbOffsetX)
+    formData.append('y', data.widget.y + data.cbOffsetY)
+    formData.append('problem_id', data.problem_id)
+    formData.append('label', data.label)
+    formData.append('fb_description', feedback.description)
+    formData.append('fb_score', feedback.score)
+    api.put('mult-choice/', formData).then(result => {
+      data.id = result.mult_choice_id
+      data.feedback_id = result.feedback_id
+      feedback.id = result.feedback_id
+      this.addMCOtoState(problemWidget, data)
+      this.updateFeedback(feedback)
+      this.generateMCOs(problemWidget, labels, index + 1, xPos + problemWidget.problem.widthMCO, yPos)
+    }).catch(err => {
+      console.log(err)
+    })
   }
 
   /**
-   * This method creates a mc option widget object and adds it to the corresponding problem
+   * This method creates a mc option widget object and adds it to the corresponding problem in the state
    * @param problemWidget The widget the mc option belongs to
    * @param data the mc option
    */
-  createNewMCWidget = (problemWidget, data) => {
+  addMCOtoState = (problemWidget, data) => {
     this.setState((prevState) => {
       return {
         widgets: update(prevState.widgets, {
@@ -371,13 +395,57 @@ class Exams extends React.Component {
     })
   }
 
+  /**
+   * This method deletes mc options coupled to a problem in both the state and the database.
+   * @param widgetId the id of the widget for which the mc options need to be deleted
+   * @param index the index of the first mc option to be removed
+   * @param nrMCOs the number of mc options to remove
+   * @returns {Promise<T | never>}
+   */
+  deleteMCOs = (widgetId, index, nrMCOs) => {
+    let widget = this.state.widgets[widgetId]
+    if (nrMCOs <= 0 || !widget.problem.mc_options.length) return
+
+    let option = widget.problem.mc_options[index]
+    return api.del('mult-choice/' + option.id)
+      .catch(err => {
+        console.log(err)
+        err.json().then(res => {
+          Notification.error('Could not delete multiple choice option' +
+            (res.message ? ': ' + res.message : ''))
+          // update to try and get a consistent state
+          this.props.updateExam(this.props.examID)
+        })
+      })
+      .then(res => {
+        let feedback = widget.problem.feedback[index]
+        feedback.deleted = true
+        this.updateFeedback(feedback)
+        this.setState((prevState) => {
+          return {
+            widgets: update(prevState.widgets, {
+              [widget.id]: {
+                problem: {
+                  mc_options: {
+                    $splice: [[index, 1]]
+                  }
+                }
+              }
+            })
+          }
+        }, () => {
+          this.deleteMCOs(widgetId, index, nrMCOs - 1)
+        })
+      })
+  }
+
   /**
    * This method is called when the mcq widget is moved. The positions of the options are stored separately and they
-  * all need to be updated
+  * all need to be updated in the state. This method does not update the positions of the mc options in the DB.
    * @param widget the problem widget that includes the mcq widget
    * @param data the new location of the mcq widget (the location of the top-left corner)
    */
-  updateMCWidget = (widget, data) => {
+  updateMCOsInState = (widget, data) => {
     let newMCO = widget.problem.mc_options.map((option, i) => {
       return {
         'widget': {
@@ -404,76 +472,19 @@ class Exams extends React.Component {
     }))
   }
 
-  /**
-   * This method generates MC options by making the right calls to the api and creating
-   * the widget object in the mc_options array of the corresponding problem.
-   * @param problemWidget the problem widget the mc options belong to
-   * @param labels the labels for the options
-   * @param index the index in the labels array (the function is recusive, this index is increased)
-   * @param xPos x position of the current option
-   * @param yPos y position of the current option
-   */
-  generateAnswerBoxes = (problemWidget, labels, index, xPos, yPos) => {
-    if (labels.length === index) return
-
-    let feedback = {
-      'name': labels[index],
-      'description': '',
-      'score': 0
-    }
-
-    let data = {
-      'label': labels[index],
-      'problem_id': problemWidget.problem.id,
-      'feedback_id': null,
-      'cbOffsetX': 7, // checkbox offset relative to option position on x axis
-      'cbOffsetY': 21, // checkbox offset relative to option position on y axis
-      'widget': {
-        'name': 'mc_option_' + labels[index],
-        'x': xPos,
-        'y': yPos,
-        'type': 'mcq_widget'
-      }
-    }
-
-    const formData = new window.FormData()
-    formData.append('name', data.widget.name)
-    formData.append('x', data.widget.x + data.cbOffsetX)
-    formData.append('y', data.widget.y + data.cbOffsetY)
-    formData.append('problem_id', data.problem_id)
-    formData.append('label', data.label)
-    formData.append('fb_description', feedback.description)
-    formData.append('fb_score', feedback.score)
-    api.put('mult-choice/', formData).then(result => {
-      data.id = result.mult_choice_id
-      data.feedback_id = result.feedback_id
-      feedback.id = result.feedback_id
-      this.createNewMCWidget(problemWidget, data)
-      this.updateFeedback(feedback)
-      this.generateAnswerBoxes(problemWidget, labels, index + 1, xPos + problemWidget.problem.widthMCO, yPos)
-    }).catch(err => {
-      console.log(err)
-    })
-  }
-
   SidePanel = (props) => {
     const selectedWidgetId = this.state.selectedWidgetId
     let selectedWidget = selectedWidgetId && this.state.widgets[selectedWidgetId]
     let problem = selectedWidget && selectedWidget.problem
-    let containsMCOptions = (problem && problem.mc_options.length > 0) || false
-    let widgetEditDisabled = (this.state.previewing || !problem) || (this.props.exam.finalized && containsMCOptions)
+    let widgetEditDisabled = (this.state.previewing || !problem) ||
+      (this.props.exam.finalized && problem.mc_options.length > 0)
     let isGraded = problem && problem.graded
     let widgetDeleteDisabled = widgetEditDisabled || isGraded
-    let totalNrAnswers = 12 // the upper limit for the nr of possible answer boxes
-    let disabledDeleteBoxes = !containsMCOptions
-    let isMCQ = (problem && problem.isMCQ) || false
-    let showPanelMCQ = isMCQ && !this.state.previewing && !this.props.exam.finalized
 
     return (
       <React.Fragment>
         <this.PanelEdit
           disabledEdit={widgetEditDisabled}
-          disableIsMCQ={widgetEditDisabled || containsMCOptions}
           disabledDelete={widgetDeleteDisabled}
           onDeleteClick={() => {
             this.setState({deletingWidget: true})
@@ -494,42 +505,7 @@ class Exams extends React.Component {
             }))
           }}
           saveProblemName={this.saveProblemName}
-          isMCQProblem={isMCQ}
-          onMCQChange={
-            (checked) => {
-              this.setState(prevState => ({
-                changedWidgetId: selectedWidgetId,
-                widgets: update(prevState.widgets, {
-                  [selectedWidgetId]: {
-                    problem: {
-                      isMCQ: {
-                        $set: checked
-                      }
-                    }
-                  }
-                })
-              }))
-            }
-          }
         />
-        { showPanelMCQ ? (
-          <PanelMCQ
-            totalNrAnswers={totalNrAnswers}
-            disabledGenerateBoxes={containsMCOptions}
-            disabledDeleteBoxes={disabledDeleteBoxes}
-            problem={problem}
-            onGenerateBoxesClick={(labels) => {
-              let problemWidget = this.state.widgets[this.state.selectedWidgetId]
-              // position the new mc option widget inside the problem widget
-              let xPos = problemWidget.x + 2
-              let yPos = problemWidget.y + 2
-              this.generateAnswerBoxes(problemWidget, labels, 0, xPos, yPos)
-            }}
-            onDeleteBoxesClick={() => {
-              this.setState({deletingMCWidget: true})
-            }}
-          />
-        ) : null }
         <this.PanelExamActions />
       </React.Fragment>
     )
@@ -537,6 +513,7 @@ class Exams extends React.Component {
 
   PanelEdit = (props) => {
     const selectedWidgetId = this.state.selectedWidgetId
+    let totalNrAnswers = 9 // the upper limit for the nr of possible answer boxes
 
     return (
       <nav className='panel'>
@@ -572,18 +549,77 @@ class Exams extends React.Component {
                 </div>
               </div>
             </div>
-            <div className='panel-block'>
-              <div className='field'>
-                <label className='label'> Multiple choice question </label>
-                <input disabled={props.disableIsMCQ} type='checkbox' checked={props.isMCQProblem} onChange={
-                  (e) => {
-                    props.onMCQChange(e.target.checked)
-                  }} />
-              </div>
-            </div>
+            {props.problem ? (
+              <PanelMCQ
+                totalNrAnswers={totalNrAnswers}
+                problem={props.problem}
+                generateMCOs={(labels) => {
+                  let problemWidget = this.state.widgets[this.state.selectedWidgetId]
+                  let xPos, yPos
+                  if (props.problem.mc_options.length > 0) {
+                    // position the new mc options widget next to the last mc options
+                    let last = props.problem.mc_options[props.problem.mc_options.length - 1].widget
+                    xPos = last.x + problemWidget.problem.widthMCO
+                    yPos = last.y
+                  } else {
+                    // position the new mc option widget inside the problem widget
+                    xPos = problemWidget.x + 2
+                    yPos = problemWidget.y + 2
+                  }
+                  this.generateMCOs(problemWidget, labels, 0, xPos, yPos)
+                }}
+                deleteMCOs={(nrMCOs) => {
+                  let len = props.problem.mc_options.length
+                  if (nrMCOs >= len) {
+                    this.setState({deletingMCWidget: true})
+                  } else if (nrMCOs > 0) {
+                    this.deleteMCOs(selectedWidgetId, len - nrMCOs, nrMCOs)
+                  }
+                }}
+                updateLabels={(labels) => {
+                  labels.map((label, index) => {
+                    let option = props.problem.mc_options[index]
+                    const formData = new window.FormData()
+                    formData.append('name', option.widget.name)
+                    formData.append('x', option.widget.x + option.cbOffsetX)
+                    formData.append('y', option.widget.y + option.cbOffsetY)
+                    formData.append('problem_id', props.problem.id)
+                    formData.append('label', labels[index])
+                    api.patch('mult-choice/' + option.id, formData)
+                      .then(() => {
+                        this.setState((prevState) => {
+                          return {
+                            widgets: update(prevState.widgets, {
+                              [selectedWidgetId]: {
+                                'problem': {
+                                  'mc_options': {
+                                    [index]: {
+                                      label: {
+                                        $set: labels[index]
+                                      }
+                                    }
+                                  }
+                                }
+                              }
+                            })
+                          }
+                        })
+                      })
+                      .catch(err => {
+                        console.log(err)
+                        err.json().then(res => {
+                          Notification.error('Could not update feedback' +
+                            (res.message ? ': ' + res.message : ''))
+                          // update to try and get a consistent state
+                          this.props.updateExam(this.props.examID)
+                        })
+                      })
+                  })
+                }}
+              />) : null}
           </React.Fragment>
         )}
-        {this.isProblemWidget(selectedWidgetId) &&
+        {props.problem &&
           <React.Fragment>
             <div className='panel-block'>
               {!this.state.editActive && <label className='label'>Feedback options</label>}
@@ -751,7 +787,12 @@ class Exams extends React.Component {
           this.state.widgets[this.state.selectedWidgetId].problem.name}"`}
         confirmText='Delete multiple choice options'
         onCancel={() => this.setState({deletingMCWidget: false})}
-        onConfirm={() => this.deleteMCWidget(this.state.selectedWidgetId)}
+        onConfirm={() => {
+          this.setState({
+            deletingMCWidget: false
+          })
+          this.deleteMCOs(this.state.selectedWidgetId, 0)
+        }}
       />
     </div>
   }

client/views/ExamEditor.jsx

@@ -112,6 +112,7 @@ class ExamEditor extends React.Component {
         api.post('problems', formData).then(result => {
           widgetData.id = result.widget_id
           problemData.id = result.id
+          problemData.name = result.problem_name
           widgetData.problem = problemData
 
           this.props.createNewWidget(widgetData)
@@ -198,7 +199,7 @@ class ExamEditor extends React.Component {
    */
   updateMCO = (widget, data) => {
     // update state
-    this.props.updateMCWidget(widget, {
+    this.props.updateMCOsInState(widget, {
       x: Math.round(data.x),
       y: Math.round(data.y)
     })
@@ -246,7 +247,7 @@ class ExamEditor extends React.Component {
 
       let changed = (oldX !== newX) || (oldY !== newY) // update the state only if the mc options were moved
       if (changed) {
-        this.props.updateMCWidget(widget, {
+        this.props.updateMCOsInState(widget, {
           x: Math.round(newX),
           y: Math.round(newY)
         })
@@ -301,7 +302,14 @@ class ExamEditor extends React.Component {
         <div className={isSelected ? 'mcq-widget widget selected' : 'mcq-widget widget '}>
           {widget.problem.mc_options.map((option) => {
             return (
-              <div key={'widget_mco_' + option.id} className='mcq-option'>
+              <div key={'widget_mco_' + option.id} className='mcq-option'
+                onMouseEnter={() => {
+                  this.props.highlightFeedback(widget, option.feedback_id)
+                }}
+                onMouseLeave={() => {
+                  this.props.removeHighlight(widget, option.feedback_id)
+                }}
+              >
                 <div className='mcq-option-label'>
                   {option.label}
                 </div>

environment.yml

+name: zesje-dev
+channels:
+    - conda-forge
+    - anaconda
+dependencies:
+    - python=3.6 
+    - yarn
+    - gunicorn
+    - redis
+    - pip
+    - pip:
+        # Core components
+        - flask
+        - flask_restful
+        - flask_sqlalchemy
+        - sqlalchemy
+        - Flask-Migrate
+        - alembic
+        - pyyaml
+        - celery
+        - redis
+
+        # General utilities
+        - numpy==1.15.4
+        - scipy==1.3.0
+
+        # summary plot generation
+        - matplotlib
+        - seaborn
+
+        # PDF generation
+        - pdfrw
+        - reportlab
+        - Wand
+        - Pillow  # also scan processing
+
+        # Scan processing
+        - opencv-python
+        - pikepdf
+        - pylibdmtx
+        - pdfminer3
+
+        # Exporting
+        - pandas
+        - openpyxl  # required for writing dataframes as Excel spreadsheets
+
+        #
+        # Development dependencies
+        #
+
+        # Tests
+        - pytest
+        - pyssim
+        - pytest-cov
+
+        # Linting
+        - flake8

package.json

@@ -3,7 +3,7 @@
   "main": "index.js",
   "license": "AGPL-3.0",
   "scripts": {
-    "dev": "concurrently --kill-others --names \"WEBPACK,PYTHON,CELERY\" --prefix-colors \"bgBlue.bold,bgGreen.bold,bgRed.bold\" \"webpack-dev-server --hot --inline --progress --config webpack.dev.js\" \"ZESJE_SETTINGS=$(pwd)/zesje.dev.cfg python3 zesje\" \"ZESJE_SETTINGS=$(pwd)/zesje.dev.cfg celery -A zesje.celery worker -l info --autoscale=4,1 --max-tasks-per-child=16\"",
+    "dev": "concurrently --kill-others --names \"WEBPACK,PYTHON,CELERY,REDIS\" --prefix-colors \"bgBlue.bold,bgGreen.bold,bgRed.bold,bgYellow.bold\" \"webpack-dev-server --hot --inline --progress --config webpack.dev.js\" \"ZESJE_SETTINGS=$(pwd)/zesje.dev.cfg python3 zesje\" \"ZESJE_SETTINGS=$(pwd)/zesje.dev.cfg celery -A zesje.celery worker -l info --autoscale=4,1 --max-tasks-per-child=16\" \"redis-server redis.conf\"",
     "build": "webpack --config webpack.prod.js",
     "ci": "yarn lint; yarn test",
     "lint": "yarn lint:js; yarn lint:py",
@@ -33,6 +33,7 @@
     "babel-plugin-transform-class-properties": "^6.24.1",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "bulma": "^0.7.1",
+    "bulma-switch": "^2.0.0",
     "bulma-tooltip": "^2.0.1",
     "concurrently": "^3.6.0",
     "css-loader": "^1.0.0",
@@ -52,6 +53,7 @@
     "react": "^16.4.0",
     "react-autosuggest": "^9.3.4",
     "react-bulma-notification": "^1.1.0",
+    "react-bulma-switch": "^0.0.3",
     "react-dom": "^16.4.0",
     "react-dropzone": "^4.2.13",
     "react-hot-loader": "^4.3.3",

redis.conf

+port 6479
+loglevel notice
\ No newline at end of file

requirements-dev.txt

-# Tests
-pytest
-pyssim
-pytest-cov
-
-# Linting
-flake8

requirements.txt

-# Core components
-flask
-flask_restful
-flask_sqlalchemy
-sqlalchemy
-Flask-Migrate
-alembic
-pyyaml
-celery
-redis
-
-# General utilities
-numpy
-scipy
-
-# summary plot generation
-matplotlib
-seaborn
-
-# PDF generation
-pdfrw
-reportlab
-Wand
-Pillow  # also scan processing
-pyStrich  # TODO: can we replace this with stuff from pylibdmtx?
-
-# Scan processing
-opencv-python
-git+https://github.com/mstamy2/PyPDF2
-pylibdmtx
-
-# Exporting
-pandas
-openpyxl  # required for writing dataframes as Excel spreadsheets

tests/conftest.py

 import os
 
 import pytest
-
 from flask import Flask
 from zesje.api import api_bp
 from zesje.database import db
@@ -40,3 +39,12 @@ def test_client(app):
     with app.app_context():
         db.drop_all()
         db.create_all()
+
+
+@pytest.fixture
+def empty_app(app):
+    with app.app_context():
+        db.drop_all()
+        db.create_all()
+
+    return app