Added autocomplete course dropdown for Generate form (#1600)

Author: matt-dahlgren

CHANGELOG.md

@@ -9,6 +9,7 @@
 - Updated the Zoom In/Zoom Out buttons on the graph page to Awesome Icons from +/-
 - Added the React ErrorBoundary library and implemented an ErrorBoundary for the Graph component in the Container component and `js/components/draw/main.js`
 - Updated the export button on the graph and grid pages to Awesome Icons; also added highlight effect and tooltip popup on hover
+- Added an autocomplete feature to the search bar `js/components/generate/GenerateForm`, also rewrote tests related to this feature
 
 ### 🐛 Bug fixes
 

js/components/generate/AutocompleteDropdown.js

@@ -0,0 +1,68 @@
+import React, { useEffect, useState } from "react"
+import Autocomplete from "@mui/material/Autocomplete"
+import Chip from "@mui/material/Chip"
+import { useField } from "formik"
+import PropTypes from "prop-types"
+
+export default function AutocompleteDropdown({
+  name,
+  placeholder,
+  id,
+  onSelectedChange,
+  ...props
+}) {
+  const [, , helpers] = useField(name)
+  const { setValue } = helpers
+  const [optionList, setOptionList] = useState([])
+
+  useEffect(() => {
+    fetch("/courses")
+      .then(response => response.text())
+      .then(data => {
+        const courses = data.split("\n").map(course => course.substring(0, 8))
+        setOptionList(courses)
+      })
+  }, [])
+
+  return (
+    <Autocomplete
+      multiple
+      onChange={(event, newValues) => {
+        onSelectedChange(newValues)
+        setValue(newValues.join(", "))
+      }}
+      options={optionList}
+      includeInputInList
+      disableClearable
+      disableCloseOnSelect
+      popupIcon={null}
+      sx={{ width: "100%" }}
+      renderValue={(value, getItemProps) =>
+        value.map((option, index) => {
+          const { key, ...itemProps } = getItemProps({ index })
+          return <Chip variant="outlined" label={option} key={key} {...itemProps} />
+        })
+      }
+      renderInput={params => (
+        <div ref={params.InputProps.ref}>
+          <input
+            aria-label={name}
+            className="autocomplete-input"
+            type="text"
+            {...params.inputProps}
+            placeholder={placeholder}
+            id={id}
+          />
+        </div>
+      )}
+      {...props}
+    />
+  )
+}
+
+AutocompleteDropdown.propTypes = {
+  name: PropTypes.string,
+  placeholder: PropTypes.string,
+  id: PropTypes.string,
+  onSelectedChange: PropTypes.func,
+}

js/components/generate/GenerateForm.js

@@ -6,12 +6,14 @@ import { Tooltip } from "react-tooltip"
 import { Graph, populateHybridRelatives } from "../graph/Graph"
 import Disclaimer from "../common/Disclaimer"
 import { NavBar } from "../common/NavBar.js.jsx"
+import AutocompleteDropdown from "./AutocompleteDropdown.js"
 
 export default class GenerateForm extends React.Component {
   constructor(props) {
     super(props)
     this.state = {
       fceCount: 0,
+      selectedCourses: [],
     }
 
     this.graph = React.createRef()
@@ -25,6 +27,10 @@ export default class GenerateForm extends React.Component {
     this.setState({ fceCount: this.state.fceCount + credits })
   }
 
+  handleCoursesChange = newCourse => {
+    this.setState({ selectedCourses: newCourse })
+  }
+
   handleSubmit = (values, { setErrors }) => {
     const data = {}
 
@@ -330,7 +336,7 @@ export default class GenerateForm extends React.Component {
                 courses: "",
                 programs: "",
                 taken: "",
-                departments: "CSC, MAT, STA",
+                departments: "",
                 maxDepth: 0,
                 location: ["utsg"],
                 includeRaws: false,
@@ -377,19 +383,25 @@ export default class GenerateForm extends React.Component {
                           ></a>
                           <Tooltip id="courses-tooltip" place="right" />
                         </div>
-                        <Field
+                        <AutocompleteDropdown
                           id="courses"
+                          aria-label="courses"
                           name="courses"
-                          type="text"
                           placeholder="e.g., CSC207H1, CSC324H1"
+                          onSelectedChange={this.handleCoursesChange}
+                          className="autocomplete"
                         />
                         <div className="error-container">
                           <ErrorMessage
                             className="error-message"
                             name="courses"
+                            type="text"
                             component="div"
                           />
                         </div>
+                        <h1 className="chosen-courses">
+                          Selected Courses: {this.state.selectedCourses.join(", ")}
+                        </h1>
                       </>
                     )}