fix: Allow searching for non-alphanumeric characters (#4266)

* fix: Allow searching for non-alphanumeric characters

Fixes #3675

@rjsparks, this avoids us needing to fork list.js. If you prefer a fork, let me
know.

* Add a TODO

ietf/static/js/list.js

@@ -197,14 +197,18 @@ $(document)
                             hook = parent[0];
                         }
 
-                        list_instance.push(
-                            new List(hook, pagination ? {
+                        let newlist = new List(hook, pagination ? {
                                 valueNames: fields,
                                 pagination: pagination,
                                 page: items_per_page
                             } : {
                                 valueNames: fields
-                            }));
+                            });
+                        // override search module with a patched version
+                        // see https://github.com/javve/list.js/issues/699
+                        // TODO: check if this is still needed if list.js ever sees an update
+                        newlist.search = require("./listjs-search")(newlist);
+                        list_instance.push(newlist);
                     });
 
                 if (enable_search) {

ietf/static/js/listjs-search.js

@@ -0,0 +1,137 @@
+module.exports = function (list) {
+  var item, text, columns, searchString, customSearch
+
+  var prepare = {
+    resetList: function () {
+      list.i = 1
+      list.templater.clear()
+      customSearch = undefined
+    },
+    setOptions: function (args) {
+      if (args.length == 2 && args[1] instanceof Array) {
+        columns = args[1]
+      } else if (args.length == 2 && typeof args[1] == 'function') {
+        columns = undefined
+        customSearch = args[1]
+      } else if (args.length == 3) {
+        columns = args[1]
+        customSearch = args[2]
+      } else {
+        columns = undefined
+      }
+    },
+    setColumns: function () {
+      if (list.items.length === 0) return
+      if (columns === undefined) {
+        columns = list.searchColumns === undefined ? prepare.toArray(list.items[0].values()) : list.searchColumns
+      }
+    },
+    setSearchString: function (s) {
+      s = list.utils.toString(s).toLowerCase()
+      // see https://github.com/javve/list.js/issues/699
+      // s = s.replace(/[-[\]{}()*+?.,\\^$|#]/g, '\\$&') // Escape regular expression characters
+      searchString = s
+    },
+    toArray: function (values) {
+      var tmpColumn = []
+      for (var name in values) {
+        tmpColumn.push(name)
+      }
+      return tmpColumn
+    },
+  }
+  var search = {
+    list: function () {
+      // Extract quoted phrases "word1 word2" from original searchString
+      // searchString is converted to lowercase by List.js
+      var words = [],
+        phrase,
+        ss = searchString
+      while ((phrase = ss.match(/"([^"]+)"/)) !== null) {
+        words.push(phrase[1])
+        ss = ss.substring(0, phrase.index) + ss.substring(phrase.index + phrase[0].length)
+      }
+      // Get remaining space-separated words (if any)
+      ss = ss.trim()
+      if (ss.length) words = words.concat(ss.split(/\s+/))
+      for (var k = 0, kl = list.items.length; k < kl; k++) {
+        var item = list.items[k]
+        item.found = false
+        if (!words.length) continue
+        for (var i = 0, il = words.length; i < il; i++) {
+          var word_found = false
+          for (var j = 0, jl = columns.length; j < jl; j++) {
+            var values = item.values(),
+              column = columns[j]
+            if (values.hasOwnProperty(column) && values[column] !== undefined && values[column] !== null) {
+              var text = typeof values[column] !== 'string' ? values[column].toString() : values[column]
+              if (text.toLowerCase().indexOf(words[i]) !== -1) {
+                // word found, so no need to check it against any other columns
+                word_found = true
+                break
+              }
+            }
+          }
+          // this word not found? no need to check any other words, the item cannot match
+          if (!word_found) break
+        }
+        item.found = word_found
+      }
+    },
+    // Removed search.item() and search.values()
+    reset: function () {
+      list.reset.search()
+      list.searched = false
+    },
+  }
+
+  var searchMethod = function (str) {
+    list.trigger('searchStart')
+
+    prepare.resetList()
+    prepare.setSearchString(str)
+    prepare.setOptions(arguments) // str, cols|searchFunction, searchFunction
+    prepare.setColumns()
+
+    if (searchString === '') {
+      search.reset()
+    } else {
+      list.searched = true
+      if (customSearch) {
+        customSearch(searchString, columns)
+      } else {
+        search.list()
+      }
+    }
+
+    list.update()
+    list.trigger('searchComplete')
+    return list.visibleItems
+  }
+
+  list.handlers.searchStart = list.handlers.searchStart || []
+  list.handlers.searchComplete = list.handlers.searchComplete || []
+
+  list.utils.events.bind(
+    list.utils.getByClass(list.listContainer, list.searchClass),
+    'keyup',
+    list.utils.events.debounce(function (e) {
+      var target = e.target || e.srcElement, // IE have srcElement
+        alreadyCleared = target.value === '' && !list.searched
+      if (!alreadyCleared) {
+        // If oninput already have resetted the list, do nothing
+        searchMethod(target.value)
+      }
+    }, list.searchDelay)
+  )
+
+  // Used to detect click on HTML5 clear button
+  list.utils.events.bind(list.utils.getByClass(list.listContainer, list.searchClass), 'input', function (e) {
+    var target = e.target || e.srcElement
+    if (target.value === '') {
+      searchMethod('')
+    }
+  })
+
+  return searchMethod
+}