From bba853893dd38a9aacfb513cb76d008baf68e673 Mon Sep 17 00:00:00 2001
From: danidfra <danielfilemondev@gmail.com>
Date: Tue, 25 Feb 2025 18:34:06 -0300
Subject: [PATCH] Complete search_filter reducer implementation and refactor
 code

---
 .../explorer/components/explorerFilter.tsx    |  53 ++--
 src/features/explorer/components/filters.tsx  | 268 ++++++++----------
 src/locales/en.json                           |   1 +
 src/reducers/index.ts                         |   2 +
 src/reducers/search-filter.ts                 | 112 ++++++--
 5 files changed, 236 insertions(+), 200 deletions(-)

diff --git a/src/features/explorer/components/explorerFilter.tsx b/src/features/explorer/components/explorerFilter.tsx
index 8035f8f45..496123b5b 100644
--- a/src/features/explorer/components/explorerFilter.tsx
+++ b/src/features/explorer/components/explorerFilter.tsx
@@ -11,57 +11,43 @@ import Text from 'soapbox/components/ui/text.tsx';
 import {
   CreateFilter,
   LanguageFilter,
-  MediaFilter,
   PlatformFilters,
-  RepliesFilter,
+  ToggleFilter,
   generateFilter,
 } from 'soapbox/features/explorer/components/filters.tsx';
 import { useAppDispatch } from 'soapbox/hooks/useAppDispatch.ts';
+import { useAppSelector } from 'soapbox/hooks/useAppSelector.ts';
 
 const messages = defineMessages({
   filters: { id: 'column.explorer.filters', defaultMessage: 'Filters:' },
-  showReplies: { id: 'column.explorer.filters.show_replies', defaultMessage: 'Show replies:' },
-  language: { id: 'column.explorer.filters.language', defaultMessage: 'Language:' },
-  platforms: { id: 'column.explorer.filters.platforms', defaultMessage: 'Platforms:' },
-  createYourFilter: { id: 'column.explorer.filters.create_your_filter', defaultMessage: 'Create your filter' },
-  filterByWords: { id: 'column.explorer.filters.filter_by_words', defaultMessage: 'Filter by this/these words' },
-  include: { id: 'column.explorer.filters.include', defaultMessage: 'Include' },
-  exclude: { id: 'column.explorer.filters.exclude', defaultMessage: 'Exclude' },
-  nostr: { id: 'column.explorer.filters.nostr', defaultMessage: 'Nostr' },
-  bluesky: { id: 'column.explorer.filters.bluesky', defaultMessage: 'Bluesky' },
-  fediverse: { id: 'column.explorer.filters.fediverse', defaultMessage: 'Fediverse' },
-  cancel: { id: 'column.explorer.filters.cancel', defaultMessage: 'Cancel' },
-  addFilter: { id: 'column.explorer.filters.add_filter', defaultMessage: 'Add Filter' },
 });
 
 interface IGenerateFilter {
   name: string;
-  state: boolean | null;
+  status: boolean | null;
   value: string;
 }
 
 const ExplorerFilter = () => {
   const dispatch = useAppDispatch();
+  const filters = useAppSelector((state) => state.search_filter);
   const intl = useIntl();
-  const [isOpen, setIsOpen] = useState(false);
-
-  const [tagFilters, setTagFilters] = useState<IGenerateFilter[]>([
-    { 'name': 'Nostr', state: null, 'value': 'protocol:nostr' },
-    { 'name': 'Bluesky', state: null, 'value': 'protocol:atproto' },
-    { 'name': 'Fediverse', state: null, 'value': 'protocol:activitypub' },
-  ]);
+  const [isOpen, setIsOpen] = useState(true);
 
   useEffect(
     () => {
-
-      const value = tagFilters
-        .filter((searchFilter) => !searchFilter.value.startsWith('protocol:'))
+      const language = filters[0].name.toLowerCase() !== 'default' ? filters[0].value : '';
+      const protocols = filters.slice(1, 4).filter((protocol) => !protocol.status).map((filter) => filter.value).join(' ');
+      const defaultFilters = filters.slice(4, 7).filter((x) => x.status).map((filter) => filter.value).join(' ');
+      const newFilters = filters.slice(7)
         .map((searchFilter) => searchFilter.value)
         .join(' ');
 
+      const value = [ language, protocols, defaultFilters, newFilters ].join(' ');
+
       dispatch(changeSearch(value));
       dispatch(submitSearch(undefined, value));
-    }, [tagFilters, dispatch],
+    }, [filters, dispatch],
   );
 
   return (
@@ -74,7 +60,7 @@ const ExplorerFilter = () => {
             {intl.formatMessage(messages.filters)}
           </Text>
 
-          {tagFilters.length > 0 && [...tagFilters.slice(0, 3).filter((x)=> x.value[0] !== '-' && x.state === null).map((value) => generateFilter(value, setTagFilters)), ...tagFilters.slice(3).map((value) => generateFilter(value, setTagFilters))]}
+          {filters.length > 0 && [...filters.slice(0, 7).filter((value) => value.status).map((value) => generateFilter(dispatch, value)), ...filters.slice(7).map((value) => generateFilter(dispatch, value))]}
 
         </HStack>
         <IconButton
@@ -88,21 +74,24 @@ const ExplorerFilter = () => {
       <Stack className={`overflow-hidden transition-all duration-500 ease-in-out  ${isOpen ? 'max-h-[1000px] opacity-100' : 'max-h-0 opacity-0'}`} space={3}>
 
         {/* Show Reply toggle */}
-        <RepliesFilter onChangeFilters={setTagFilters} />
+        <ToggleFilter type='reply' />
 
         {/* Media toggle */}
-        <MediaFilter onChangeFilters={setTagFilters} />
+        <ToggleFilter type='media' />
+
+        {/* Video toggle */}
+        <ToggleFilter type='video' />
 
         {/* Language */}
-        <LanguageFilter onChangeFilters={setTagFilters} />
+        <LanguageFilter />
 
         {/* Platforms */}
-        <PlatformFilters onChangeFilters={setTagFilters} filters={tagFilters} />
+        <PlatformFilters />
 
         <Divider />
 
         {/* Create your filter */}
-        <CreateFilter onChangeFilters={setTagFilters} />
+        <CreateFilter />
 
       </Stack>
 
diff --git a/src/features/explorer/components/filters.tsx b/src/features/explorer/components/filters.tsx
index 5d6b59bf1..4637f3c7a 100644
--- a/src/features/explorer/components/filters.tsx
+++ b/src/features/explorer/components/filters.tsx
@@ -15,11 +15,16 @@ import Text from 'soapbox/components/ui/text.tsx';
 import Toggle from 'soapbox/components/ui/toggle.tsx';
 import { IGenerateFilter } from 'soapbox/features/explorer/components/explorerFilter.tsx';
 import { SelectDropdown } from 'soapbox/features/forms/index.tsx';
+import { useAppDispatch } from 'soapbox/hooks/useAppDispatch.ts';
+import { useAppSelector } from 'soapbox/hooks/useAppSelector.ts';
+import { changeLanguage, createFilter, handleToggle, removeFilter, selectProtocol } from 'soapbox/reducers/search-filter.ts';
+import { AppDispatch, RootState } from 'soapbox/store.ts';
+import toast from 'soapbox/toast.tsx';
 
 const messages = defineMessages({
-  filters: { id: 'column.explorer.filters', defaultMessage: 'Filters:' },
   showReplies: { id: 'column.explorer.filters.show_replies', defaultMessage: 'Show replies:' },
   showMedia: { id: 'column.explorer.filters.show_text_posts', defaultMessage: 'Just text posts:' },
+  showVideo: { id: 'column.explorer.filters.show_video_posts', defaultMessage: 'Just posts with video:' },
   language: { id: 'column.explorer.filters.language', defaultMessage: 'Language:' },
   platforms: { id: 'column.explorer.filters.platforms', defaultMessage: 'Platforms:' },
   createYourFilter: { id: 'column.explorer.filters.create_your_filter', defaultMessage: 'Create your filter' },
@@ -93,36 +98,46 @@ const languages = {
   zh: '中文',
 };
 
-interface IFilter {
-  onChangeFilters: React.Dispatch<React.SetStateAction<IGenerateFilter[]>>;
-}
-
-interface IPlatformFilters {
-  filters: IGenerateFilter[];
-  onChangeFilters: React.Dispatch<React.SetStateAction<IGenerateFilter[]>>;
-}
-
-const PlatformFilters = ({ onChangeFilters, filters }: IPlatformFilters) => {
+const PlatformFilters = () => {
   const intl = useIntl();
+  const dispatch = useAppDispatch();
+  const filterList = useAppSelector((state: RootState) => state.search_filter);
 
-  const toggleProtocolFilter = (protocolName: string, protocolValue: string) => {
-    onChangeFilters(prevFilters => {
+  const handleProtocolFilter = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const protocol = e.target.name;
 
-      const exists = prevFilters.some(tag => tag.name.toLowerCase() === protocolName.toLowerCase() && tag.value[0] !== '-');
-      const newFilterList = prevFilters.filter(tag => tag.name.toLowerCase() !== protocolName.toLowerCase());
+    dispatch(selectProtocol(protocol));
+  };
 
-      const newFilter = {
-        name: protocolName,
-        state: null,
-        value: exists ? `-protocol:${protocolValue}` : `protocol:${protocolValue}`,
-      };
+  const CheckBox = ({ protocolN } : { protocolN: string }) => {
+    const filter = filterList.find((filter) => filter.name.toLowerCase() === protocolN);
+    const checked = filter?.status;
 
-      if (newFilterList.length === 0) {
-        return [newFilter];
-      }
+    let message;
+    switch (protocolN) {
+      case 'nostr':
+        message = messages.nostr;
+        break;
+      case 'bluesky':
+        message = messages.bluesky;
+        break;
+      default:
+        message = messages.fediverse;
+    }
 
-      return [newFilterList[0], newFilter, ...newFilterList.slice(1)];
-    });
+
+    return (
+      <HStack alignItems='center' space={2}>
+        <Checkbox
+          name={protocolN}
+          checked={checked}
+          onChange={handleProtocolFilter}
+        />
+        <Text size='lg'>
+          {intl.formatMessage(message)}
+        </Text>
+      </HStack>
+    );
   };
 
   return (
@@ -132,56 +147,33 @@ const PlatformFilters = ({ onChangeFilters, filters }: IPlatformFilters) => {
       </Text>
 
       {/* Nostr */}
-      <HStack alignItems='center' space={2}>
-        <Checkbox
-          name='nostr'
-          checked={filters.some(tag => tag.name.toLowerCase() === 'nostr' && tag.value[0] !== '-')}
-          onChange={() => toggleProtocolFilter('Nostr', 'nostr')}
-        />
-        <Text size='lg'>
-          {intl.formatMessage(messages.nostr)}
-        </Text>
-      </HStack>
+      <CheckBox protocolN={'nostr'} />
 
       {/* Bluesky */}
-      <HStack alignItems='center' space={2}>
-        <Checkbox
-          name='bluesky'
-          checked={filters.some(tag => tag.name.toLowerCase() === 'bluesky' && tag.value[0] !== '-')}
-          onChange={() => toggleProtocolFilter('Bluesky', 'atproto')}
-        />
-        <Text size='lg'>
-          {intl.formatMessage(messages.bluesky)}
-        </Text>
-      </HStack>
+      <CheckBox protocolN={'bluesky'} />
 
       {/* Fediverse */}
-      <HStack alignItems='center' space={2}>
-        <Checkbox
-          name='fediverse'
-          checked={filters.some(tag => tag.name.toLowerCase() === 'fediverse' && tag.value[0] !== '-')}
-          onChange={() => toggleProtocolFilter('Fediverse', 'activitypub')}
-        />
-        <Text size='lg'>
-          {intl.formatMessage(messages.fediverse)}
-        </Text>
-      </HStack>
+      <CheckBox protocolN={'fediverse'} />
 
     </HStack>
   );
 
 };
 
-const CreateFilter = ({ onChangeFilters }: IFilter) => {
+const CreateFilter = () => {
   const intl = useIntl();
+  const dispatch = useAppDispatch();
+
   const [inputValue, setInputValue] = useState('');
-  const [include, setInclude] = useState('');
+  const [include, setInclude] = useState(true);
   const hasValue = inputValue.length > 0;
 
   const handleAddFilter = () => {
-    onChangeFilters((prev) => {
-      return [...prev, { name: inputValue, state: include === '', value: `${include}${inputValue.split(' ').join(` ${include}`)}` }];
-    });
+    if (inputValue.length > 0) {
+      dispatch(createFilter({ name: inputValue, status: include }));
+    } else {
+      toast.error('Hey there... you forget to write the filter!');
+    }
   };
 
   return (
@@ -223,9 +215,9 @@ const CreateFilter = ({ onChangeFilters }: IFilter) => {
           <HStack alignItems='center' space={2}>
             <Checkbox
               name='include'
-              checked={!(include.length > 0)}
+              checked={include}
               onChange={() => {
-                setInclude('');
+                setInclude(true);
               }}
             />
             <Text size='lg'>
@@ -237,9 +229,9 @@ const CreateFilter = ({ onChangeFilters }: IFilter) => {
           <HStack alignItems='center' space={2}>
             <Checkbox
               name='exclude'
-              checked={(include.length > 0)}
+              checked={!include}
               onChange={() => {
-                setInclude('-');
+                setInclude(false);
               }}
             />
             <Text size='lg'>
@@ -252,7 +244,7 @@ const CreateFilter = ({ onChangeFilters }: IFilter) => {
       <HStack className='w-full p-0.5' space={2}>
         <Button
           className='w-1/2' theme='secondary' onClick={() => {
-            setInclude('');
+            setInclude(false);
             setInputValue('');
           }
           }
@@ -270,19 +262,13 @@ const CreateFilter = ({ onChangeFilters }: IFilter) => {
 
 };
 
-const LanguageFilter = ({ onChangeFilters }: IFilter) => {
+const LanguageFilter = () => {
   const intl = useIntl();
+  const dispatch = useAppDispatch();
 
   const handleSelectChange: React.ChangeEventHandler<HTMLSelectElement> = e => {
-    const value = e.target.value;
-
-    if (value.toLowerCase() === 'default') {
-      onChangeFilters((prevValue) => prevValue.filter((value) => !value.value.includes('language:')));
-    } else {
-      onChangeFilters((prevValue) => {
-        return [{ name: value.toUpperCase(), state: null, value: `language:${value}` }, ...prevValue.filter((value) => !value.value.includes('language:'))];
-      });
-    }
+    const language = e.target.value;
+    dispatch(changeLanguage(language));
   };
 
   return (
@@ -302,105 +288,97 @@ const LanguageFilter = ({ onChangeFilters }: IFilter) => {
 
 };
 
-const RepliesFilter = ({ onChangeFilters }: IFilter) => {
+const ToggleFilter = ({ type }: {type: 'reply' | 'media' | 'video'}) => {
   const intl = useIntl();
-  const [showReplies, setShowReplies] = useState(false);
+  const dispatch = useAppDispatch();
+  const filterType = type.toLowerCase();
+  let label;
 
-  const handleToggleReplies: React.ChangeEventHandler<HTMLInputElement> = (e) => {
-    setShowReplies(!showReplies);
-    const isOn = e.target.checked;
+  switch (type) {
+    case 'reply':
+      label = intl.formatMessage(messages.showReplies);
+      break;
+    case 'media':
+      label = intl.formatMessage(messages.showMedia);
+      break;
+    default:
+      label = intl.formatMessage(messages.showVideo);
+  }
 
-    if (isOn) {
-      onChangeFilters((prevValue) => [...prevValue.filter((prev) => prev.name.toLowerCase() !== 'reply'), { name: 'Reply', state: null, value: 'reply:true' }]);
-    } else {
-      onChangeFilters((prevValue) => [...prevValue.filter((prev) => prev.name.toLowerCase() !== 'reply')]);
-    }
+  const filters = useAppSelector((state) => state.search_filter);
+  const repliesFilter = filters.find((filter) => filter.name.toLowerCase() === filterType);
+  const checked = repliesFilter?.status;
+
+  const handleToggleComponent = () => {
+    dispatch(handleToggle({ type: filterType, checked: !checked }));
   };
 
   return (
     <HStack className='flex-wrap whitespace-normal' alignItems='center' space={2}>
       <Text size='lg' weight='bold'>
-        {intl.formatMessage(messages.showReplies)}
+        {label}
       </Text>
       <Toggle
-        checked={showReplies}
-        onChange={handleToggleReplies}
+        checked={checked}
+        onChange={handleToggleComponent}
       />
     </HStack>
   );
-
 };
 
-const MediaFilter = ({ onChangeFilters }: IFilter) => {
-  const intl = useIntl();
-  const [showMedia, setShowMedia] = useState(false);
-
-  const handleToggleReplies: React.ChangeEventHandler<HTMLInputElement> = (e) => {
-    setShowMedia(!showMedia);
-    const isOn = e.target.checked;
-
-    if (isOn) {
-      onChangeFilters((prevValue) => [...prevValue.filter((prev) => prev.name.toLowerCase() !== 'text'), { name: 'Text', state: null, value: 'media:false' }]);
-    } else {
-      onChangeFilters((prevValue) => [...prevValue.filter((prev) => prev.name.toLowerCase() !== 'text')]);
-    }
-  };
-
-  return (
-    <HStack className='flex-wrap whitespace-normal' alignItems='center' space={2}>
-      <Text size='lg' weight='bold'>
-        {intl.formatMessage(messages.showMedia)}
-      </Text>
-      <Toggle
-        checked={showMedia}
-        onChange={handleToggleReplies}
-      />
-    </HStack>
-  );
-
-};
-
-const generateFilter = ({ name, state }: IGenerateFilter, onChangeFilters: React.Dispatch<React.SetStateAction<IGenerateFilter[]>>) => {
+const generateFilter = (dispatch: AppDispatch, { name, status }: IGenerateFilter) => {
   let borderColor = '';
   let textColor = '';
   let hasButton = false;
-  switch (name.toLowerCase()) {
-    case 'nostr':
-      borderColor = 'border-purple-500';
-      textColor = 'text-purple-500';
-      break;
-    case 'bluesky':
-      borderColor = 'border-blue-500';
-      textColor = 'text-blue-500';
-      break;
-    case 'fediverse':
-      borderColor = 'border-indigo-500';
-      textColor = 'text-indigo-500';
-      break;
-    default:
-      if (name.toLowerCase() === 'reply' || name.toLowerCase() === 'text' || Object.keys(languages).some((lang) => lang === name.toLowerCase())) {
-        borderColor = 'border-grey-500';
-        textColor = 'text-grey-500';
+  const nameLowCase = name.toLowerCase();
+
+  const handleChangeFilters = () => {
+    dispatch(removeFilter(name));
+  };
+
+  if (Object.keys(languages).some((lang) => lang.toLowerCase() === nameLowCase)) {
+    borderColor = 'border-gray-500';
+    textColor = 'text-gray-500';
+  } else {
+    switch (nameLowCase) {
+      case 'reply':
+      case 'media':
+      case 'video':
+        borderColor = 'border-gray-500';
+        textColor = 'text-gray-500';
         break;
-      }
-      borderColor = state ? 'border-green-500' : 'border-red-500';
-      textColor = state ? 'text-green-500' : 'text-red-500';
-      hasButton = true;
+      case 'nostr':
+        borderColor = 'border-purple-500';
+        textColor = 'text-purple-500';
+        break;
+      case 'bluesky':
+        borderColor = 'border-blue-500';
+        textColor = 'text-blue-500';
+        break;
+      case 'fediverse':
+        borderColor = 'border-indigo-500';
+        textColor = 'text-indigo-500';
+        break;
+      default:
+        borderColor = status ? 'border-green-500' : 'border-red-500';
+        textColor = status ? 'text-green-500' : 'text-red-500';
+        hasButton = true;
+    }
   }
 
   return (
     <div
       key={name}
-      className={`group m-1 flex items-center gap-0.5 whitespace-normal break-words rounded-full border-2 bg-transparent px-3 text-base font-medium shadow-sm hover:cursor-pointer ${hasButton ? 'hover:pr-1' : '' } ${borderColor} `}
+      className={`group m-1 flex items-center gap-0.5 whitespace-normal break-words rounded-full border-2 bg-transparent px-3 text-base font-medium shadow-sm hover:cursor-pointer ${hasButton ? 'hover:pr-1' : '' } ${borderColor} ${textColor} `}
     >
       {name}
       {hasButton && <IconButton
-        iconClassName='!w-4' className={`hidden !p-0 px-1 group-hover:block ${textColor}`} src={xIcon} onClick={() => onChangeFilters((prevValue) => {
-          return prevValue.filter((x) => x.name !== name);
-        })}
+        iconClassName='!w-4' className={`hidden !p-0 px-1 group-hover:block ${textColor}`} src={xIcon}
+        onClick={handleChangeFilters}
+
       />}
     </div>
   );
 };
 
-export { CreateFilter, PlatformFilters, LanguageFilter, RepliesFilter, MediaFilter, generateFilter };
\ No newline at end of file
+export { CreateFilter, PlatformFilters, LanguageFilter, ToggleFilter, generateFilter };
\ No newline at end of file
diff --git a/src/locales/en.json b/src/locales/en.json
index 7bda59c24..26e439175 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -385,6 +385,7 @@
   "column.explorer.filters.platforms": "Platforms:",
   "column.explorer.filters.show_replies": "Show replies:",
   "column.explorer.filters.show_text_posts": "Just text posts:",
+  "column.explorer.filters.show_video_posts": "Just posts with video:",
   "column.explorer.nostr_card.text": "Wondering about Nostr? <a>Click here</a>",
   "column.explorer.nostr_card.title": "Nostr",
   "column.explorer.popular_accounts": "Popular Accounts",
diff --git a/src/reducers/index.ts b/src/reducers/index.ts
index e57877462..031f6336b 100644
--- a/src/reducers/index.ts
+++ b/src/reducers/index.ts
@@ -41,6 +41,7 @@ import profile_hover_card from './profile-hover-card.ts';
 import relationships from './relationships.ts';
 import reports from './reports.ts';
 import scheduled_statuses from './scheduled-statuses.ts';
+import search_filter from './search-filter.ts';
 import search from './search.ts';
 import security from './security.ts';
 import settings from './settings.ts';
@@ -98,6 +99,7 @@ export default combineReducers({
   reports,
   scheduled_statuses,
   search,
+  search_filter,
   security,
   settings,
   sidebar,
diff --git a/src/reducers/search-filter.ts b/src/reducers/search-filter.ts
index c41fe7090..bdd506b42 100644
--- a/src/reducers/search-filter.ts
+++ b/src/reducers/search-filter.ts
@@ -1,43 +1,109 @@
 import { PayloadAction, createSlice } from '@reduxjs/toolkit';
 
 interface IFilters {
-  name: string;
-  state: boolean;
-  value: string;
+  name: string;  // The name of the filter.
+  status: boolean;  // Whether the filter is active or not.
+  value: string;  // The filter value used for searching.
+}
+
+interface IToggle {
+  type: string;  // The filter type to toggle.
+  checked: boolean;  // The new status of the filter.
+}
+
+interface INewFilter {
+  name: string;  // The name of the new filter.
+  status: boolean;  // Whether the filter should be active by default.
 }
 
 const initialState: IFilters[] = [
-  { name: 'Nostr', state: true, value: 'protocol:nostr' },
-  { name: 'Bluesky', state: true, value: 'protocol:atproto' },
-  { name: 'Fediverse', state: true, value: 'protocol:activitypub' },
-  { name: 'Global', state: false, value: 'language' },
-  { name: 'Reply', state: false, value: 'reply:true' },
-  { name: 'Media', state: false, value: 'media:true' },
-  { name: 'Video', state: false, value: 'video:true' },
+  { name: 'Default', status: false, value: 'language:default' },
+  { name: 'Nostr', status: true, value: 'protocol:nostr' },
+  { name: 'Bluesky', status: true, value: 'protocol:atproto' },
+  { name: 'Fediverse', status: true, value: 'protocol:activitypub' },
+  { name: 'Reply', status: false, value: 'reply:true' },
+  { name: 'Media', status: false, value: 'media:true' },
+  { name: 'Video', status: false, value: 'video:true' },
 ];
 
 const search_filter = createSlice({
   name: 'search_filter',
   initialState,
   reducers: {
-    handleToggleReplies: (state, action: PayloadAction<boolean>) => {
-      return state.map((prevEstate) => {
-        const checked = action.payload;
-        return prevEstate.name.toLowerCase() === 'reply'
-          ?
-          {
-            ...prevEstate,
-            state: checked,
-            value: `reply:${checked}`,
+    /**
+     * Toggles the status of a filter.
+     */
+    handleToggle: (state, action: PayloadAction<IToggle>) => {
+      return state.map((currentState) => {
+        const checked = action.payload.checked;
+        const type = action.payload.type.toLowerCase();
+        return currentState.name.toLowerCase() === type
+          ? {
+            ...currentState,
+            status: checked,
+            value: `${type}:${checked}`,
           }
-          :
-          prevEstate;
-      },
+          : currentState;
+      });
+    },
+
+    /**
+     * Changes the language filter.
+     */
+    changeLanguage: (state, action: PayloadAction<string>) => {
+      const selected = action.payload.toLowerCase();
+      return state.map((currentState) =>
+        currentState.value.includes('language:')
+          ? {
+            name: selected.toUpperCase(),
+            status: selected !== 'default',
+            value: `language:${selected}`,
+          }
+          : currentState,
       );
     },
+
+    /**
+     * Toggles the status of a protocol filter.
+     */
+    selectProtocol: (state, action: PayloadAction<string>) => {
+      const protocol = action.payload.toLowerCase();
+      return state.map((currentState) => {
+        const newStatus = !currentState.status;
+        if (currentState.name.toLowerCase() !== protocol) return currentState;
+        return {
+          ...currentState,
+          status: newStatus,
+          value: newStatus ? currentState.value.slice(1) : `-${currentState.value}`,
+        };
+      });
+    },
+
+    /**
+     * Creates a new filter.
+     */
+    createFilter: (state, action: PayloadAction<INewFilter>) => {
+      const filterWords = action.payload.name.trim();
+      const status = action.payload.status;
+      const value = status ? filterWords : `-${filterWords.split(' ').join(' -')}`;
+      return state.some((currentState) => currentState.name === filterWords)
+        ? state
+        : [...state, { name: filterWords, status: status, value: value }];
+    },
+
+    /**
+     * Removes a filter.
+     */
+    removeFilter: (state, action: PayloadAction<string>) => {
+      return state.filter((filter) => filter.name !== action.payload);
+    },
+
+    /**
+     * Resets the filters to the initial state.
+     */
     resetFilters: () => initialState,
   },
 });
 
-export const { handleToggleReplies, resetFilters } = search_filter.actions;
+export const { handleToggle, changeLanguage, selectProtocol, createFilter, removeFilter, resetFilters } = search_filter.actions;
 export default search_filter.reducer;
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