From 4af3f85e64e795e8ae1d87d4caee8185028294ac Mon Sep 17 00:00:00 2001
From: Ariel Leyva <msomnium.info@gmail.com>
Date: Fri, 6 Mar 2026 09:26:13 -0500
Subject: [PATCH] fix(csv-viewer): add support for missing text encodings in
 dropdown list (#5795)

---
 frontend/src/components/DropdownModal.vue   | 142 ++++++++++++++++
 frontend/src/components/files/CsvViewer.vue | 107 ++++++++++--
 frontend/src/types/global.d.ts              |   4 +
 frontend/src/utils/encodings.ts             | 173 ++++++++++++++++++++
 frontend/src/utils/index.ts                 |  22 +++
 frontend/src/views/files/Preview.vue        |   6 +-
 http/resource.go                            |   2 +-
 7 files changed, 439 insertions(+), 17 deletions(-)
 create mode 100644 frontend/src/components/DropdownModal.vue

diff --git a/frontend/src/components/DropdownModal.vue b/frontend/src/components/DropdownModal.vue
new file mode 100644
index 00000000..66780120
--- /dev/null
+++ b/frontend/src/components/DropdownModal.vue
@@ -0,0 +1,142 @@
+<script setup lang="ts">
+import { ref, watch, onMounted, onBeforeUnmount } from "vue";
+import { vClickOutside } from "@/utils/index";
+
+const props = withDefaults(
+  defineProps<{
+    position?: "top-left" | "bottom-left" | "bottom-right" | "top-right";
+    closeOnClick?: boolean;
+  }>(),
+  {
+    position: "bottom-right",
+    closeOnClick: true,
+  }
+);
+
+const isOpen = defineModel<boolean>();
+
+const triggerRef = ref<HTMLElement | null>(null);
+const listRef = ref<HTMLElement | null>(null);
+const dropdownStyle = ref<Record<string, string>>({});
+
+const updatePosition = () => {
+  if (!isOpen.value || !triggerRef.value) return;
+
+  const rect = triggerRef.value.getBoundingClientRect();
+
+  dropdownStyle.value = {
+    position: "fixed",
+    top: props.position.includes("bottom")
+      ? `${rect.bottom + 2}px`
+      : `${rect.top}px`,
+    left: props.position.includes("left") ? `${rect.left}px` : "auto",
+    right: props.position.includes("right")
+      ? `${window.innerWidth - rect.right}px`
+      : "auto",
+    zIndex: "11000",
+  };
+};
+
+watch(isOpen, (open) => {
+  if (open) {
+    updatePosition();
+  }
+});
+
+const onWindowChange = () => {
+  updatePosition();
+};
+
+const closeDropdown = (e: Event) => {
+  if (
+    e.target instanceof HTMLElement &&
+    listRef.value?.contains(e.target) &&
+    !props.closeOnClick
+  ) {
+    return;
+  }
+  isOpen.value = false;
+};
+
+onMounted(() => {
+  window.addEventListener("resize", onWindowChange);
+  window.addEventListener("scroll", onWindowChange, true);
+});
+
+onBeforeUnmount(() => {
+  window.removeEventListener("resize", onWindowChange);
+  window.removeEventListener("scroll", onWindowChange, true);
+});
+</script>
+
+<script lang="ts">
+export default {
+  directives: {
+    clickOutside: vClickOutside,
+  },
+};
+</script>
+
+<template>
+  <div
+    class="dropdown-modal-container"
+    v-click-outside="closeDropdown"
+    ref="triggerRef"
+  >
+    <button @click="isOpen = !isOpen" class="dropdown-modal-trigger">
+      <slot></slot>
+      <i class="material-icons">chevron_right</i>
+    </button>
+
+    <teleport to="body">
+      <div
+        ref="listRef"
+        class="dropdown-modal-list"
+        :class="{ 'dropdown-modal-open': isOpen }"
+        :style="dropdownStyle"
+      >
+        <div>
+          <slot name="list"></slot>
+        </div>
+      </div>
+    </teleport>
+  </div>
+</template>
+
+<style scoped>
+.dropdown-modal-trigger {
+  background: var(--surfacePrimary);
+  color: var(--textSecondary);
+  border: 1px solid var(--borderPrimary);
+  border-radius: 0.1em;
+  padding: 0.5em 1em;
+  transition: 0.2s ease all;
+  margin: 0;
+  display: flex;
+  justify-content: space-between;
+  gap: 1rem;
+  align-items: center;
+}
+
+.dropdown-modal-trigger > i {
+  transform: rotate(90deg);
+}
+
+.dropdown-modal-list {
+  padding: 0.25rem;
+  background-color: var(--surfacePrimary);
+  color: var(--textSecondary);
+  display: none;
+  border: 1px solid var(--borderPrimary);
+  border-radius: 0.1em;
+}
+
+.dropdown-modal-list > div {
+  max-height: 450px;
+  padding: 0.25rem;
+}
+
+.dropdown-modal-open {
+  display: block;
+}
+</style>
diff --git a/frontend/src/components/files/CsvViewer.vue b/frontend/src/components/files/CsvViewer.vue
index 38c2de59..9e1904af 100644
--- a/frontend/src/components/files/CsvViewer.vue
+++ b/frontend/src/components/files/CsvViewer.vue
@@ -21,19 +21,37 @@
       </div>
       <div class="header-select" v-if="isEncodedContent">
         <label for="fileEncoding">{{ $t("files.fileEncoding") }}</label>
-        <select
-          id="fileEncoding"
-          class="input input--block"
-          v-model="selectedEncoding"
+        <DropdownModal
+          v-model="isEncondingDropdownOpen"
+          :close-on-click="false"
         >
-          <option
-            v-for="encoding in availableEncodings"
-            :value="encoding"
-            :key="encoding"
-          >
-            {{ encoding }}
-          </option>
-        </select>
+          <div>
+            <span class="selected-encoding">{{ selectedEncoding }}</span>
+          </div>
+          <template v-slot:list>
+            <input
+              v-model="encodingSearch"
+              :placeholder="$t('search.search')"
+              class="input input--block"
+              name="encoding"
+            />
+            <div class="encoding-list">
+              <div v-if="encodingList.length == 0" class="message">
+                <i class="material-icons">sentiment_dissatisfied</i>
+                <span>{{ $t("files.lonely") }}</span>
+              </div>
+              <button
+                v-for="encoding in encodingList"
+                :value="encoding"
+                :key="encoding"
+                class="encoding-button"
+                @click="selectedEncoding = encoding"
+              >
+                {{ encoding }}
+              </button>
+            </div>
+          </template>
+        </DropdownModal>
       </div>
     </div>
     <div v-if="displayError" class="csv-error">
@@ -74,10 +92,11 @@
 </template>
 
 <script setup lang="ts">
-import { computed, ref, watchEffect } from "vue";
+import { computed, ref, watch, watchEffect } from "vue";
 import { parse } from "csv-parse/browser/esm";
 import { useI18n } from "vue-i18n";
 import { availableEncodings, decode } from "@/utils/encodings";
+import DropdownModal from "../DropdownModal.vue";
 
 const { t } = useI18n({});
 
@@ -90,6 +109,16 @@ const props = withDefaults(defineProps<Props>(), {
   error: "",
 });
 
+const isEncondingDropdownOpen = ref(false);
+
+const encodingSearch = ref<string>("");
+
+const encodingList = computed(() => {
+  return availableEncodings.filter((e) =>
+    e.toLowerCase().includes(encodingSearch.value.toLowerCase())
+  );
+});
+
 const columnSeparator = ref([",", ";"]);
 
 const selectedEncoding = ref("utf-8");
@@ -128,6 +157,11 @@ watchEffect(() => {
     );
   }
 });
+
+watch(selectedEncoding, () => {
+  isEncondingDropdownOpen.value = false;
+  encodingSearch.value = "";
+});
 </script>
 
 <style scoped>
@@ -271,14 +305,21 @@ watchEffect(() => {
   align-items: center;
   gap: 0.5rem;
   margin-bottom: 0.5rem;
+  flex-direction: column;
+  @media (width >= 640px) {
+    flex-direction: row;
+  }
 }
 
 .header-select > label {
   font-size: small;
-  max-width: 80px;
+  @media (width >= 640px) {
+    max-width: 70px;
+  }
 }
 
-.header-select > select {
+.header-select > select,
+.header-select > div {
   margin-bottom: 0;
 }
 
@@ -286,4 +327,40 @@ watchEffect(() => {
   font-size: 1.2rem;
   color: var(--blue);
 }
+
+.encoding-list {
+  max-height: 300px;
+  min-width: 120px;
+  overflow: auto;
+  overscroll-behavior: contain;
+  -webkit-overflow-scrolling: touch;
+  touch-action: pan-y;
+}
+
+.encoding-button {
+  background-color: transparent;
+  border: none;
+  outline: none;
+  padding: 0.25rem 0.5rem;
+  color: var(--textPrimary);
+  text-align: left;
+  cursor: pointer;
+  border-radius: 0.2rem;
+  white-space: nowrap;
+  display: block;
+  width: 100%;
+}
+
+.encoding-button:hover {
+  background-color: var(--surfaceSecondary);
+}
+
+.selected-encoding {
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
+
+.message {
+  font-size: 1.25em;
+}
 </style>
diff --git a/frontend/src/types/global.d.ts b/frontend/src/types/global.d.ts
index 5475c908..287388f0 100644
--- a/frontend/src/types/global.d.ts
+++ b/frontend/src/types/global.d.ts
@@ -10,4 +10,8 @@ declare global {
     // TODO: no idea what the exact type is
     __vue__: any;
   }
+
+  interface HTMLElement {
+    clickOutsideEvent?: (event: Event) => void;
+  }
 }
diff --git a/frontend/src/utils/encodings.ts b/frontend/src/utils/encodings.ts
index 80f1e219..9be1017a 100644
--- a/frontend/src/utils/encodings.ts
+++ b/frontend/src/utils/encodings.ts
@@ -1,4 +1,5 @@
 export const availableEncodings = [
+  // encodings
   "utf-8",
   "ibm866",
   "iso-8859-2",
@@ -37,6 +38,178 @@ export const availableEncodings = [
   "euc-kr",
   "utf-16be",
   "utf-16le",
+  // label encodings
+  "unicode-1-1-utf-8",
+  "utf8",
+  "866",
+  "cp866",
+  "csibm866",
+  "csisolatin2",
+  "iso-ir-101",
+  "iso8859-2",
+  "iso88592",
+  "iso_8859-2",
+  "iso_8859-2:1987",
+  "l2",
+  "latin2",
+  "csisolatin3",
+  "iso-ir-109",
+  "iso8859-3",
+  "iso88593",
+  "iso_8859-3",
+  "iso_8859-3:1988",
+  "l3",
+  "latin3",
+  "csisolatin4",
+  "iso-ir-110",
+  "iso8859-4",
+  "iso88594",
+  "iso_8859-4",
+  "iso_8859-4:1988",
+  "l4",
+  "latin4",
+  "csisolatincyrillic",
+  "cyrillic",
+  "iso-ir-144",
+  "iso88595",
+  "iso_8859-5",
+  "iso_8859-5:1988",
+  "arabic",
+  "asmo-708",
+  "csiso88596e",
+  "csiso88596i",
+  "csisolatinarabic",
+  "ecma-114",
+  "iso-8859-6-e",
+  "iso-8859-6-i",
+  "iso-ir-127",
+  "iso8859-6",
+  "iso88596",
+  "iso_8859-6",
+  "iso_8859-6:1987",
+  "csisolatingreek",
+  "ecma-118",
+  "elot_928",
+  "greek",
+  "greek8",
+  "iso-ir-126",
+  "iso8859-7",
+  "iso88597",
+  "iso_8859-7",
+  "iso_8859-7:1987",
+  "sun_eu_greek",
+  "csiso88598e",
+  "csisolatinhebrew",
+  "hebrew",
+  "iso-8859-8-e",
+  "iso-ir-138",
+  "iso8859-8",
+  "iso88598",
+  "iso_8859-8",
+  "iso_8859-8:1988",
+  "visual",
+  "csiso88598i",
+  "logical",
+  "csisolatin6",
+  "iso-ir-157",
+  "iso8859-10",
+  "iso885910",
+  "l6",
+  "latin6",
+  "iso8859-13",
+  "iso885913",
+  "iso8859-14",
+  "iso885914",
+  "csisolatin9",
+  "iso8859-15",
+  "iso885915",
+  "l9",
+  "latin9",
+  "cskoi8r",
+  "koi",
+  "koi8",
+  "koi8_r",
+  "csmacintosh",
+  "mac",
+  "x-mac-roman",
+  "dos-874",
+  "iso-8859-11",
+  "iso8859-11",
+  "iso885911",
+  "tis-620",
+  "cp1250",
+  "x-cp1250",
+  "cp1251",
+  "x-cp1251",
+  "ansi_x3.4-1968",
+  "ascii",
+  "cp1252",
+  "cp819",
+  "csisolatin1",
+  "ibm819",
+  "iso-8859-1",
+  "iso-ir-100",
+  "iso8859-1",
+  "iso88591",
+  "iso_8859-1",
+  "iso_8859-1:1987",
+  "l1",
+  "latin1",
+  "us-ascii",
+  "x-cp1252",
+  "cp1253",
+  "x-cp1253",
+  "cp1254",
+  "csisolatin5",
+  "iso-8859-9",
+  "iso-ir-148",
+  "iso8859-9",
+  "iso88599",
+  "iso_8859-9",
+  "iso_8859-9:1989",
+  "l5",
+  "latin5",
+  "x-cp1254",
+  "cp1255",
+  "x-cp1255",
+  "cp1256",
+  "x-cp1256",
+  "cp1257",
+  "x-cp1257",
+  "cp1258",
+  "x-cp1258",
+  "x-mac-ukrainian",
+  "chinese",
+  "csgb2312",
+  "csiso58gb231280",
+  "gb2312",
+  "gb_2312",
+  "gb_2312-80",
+  "iso-ir-58",
+  "x-gbk",
+  "big5-hkscs",
+  "cn-big5",
+  "csbig5",
+  "x-x-big5",
+  "cseucpkdfmtjapanese",
+  "x-euc-jp",
+  "csiso2022jp",
+  "csshiftjis",
+  "ms_kanji",
+  "shift-jis",
+  "sjis",
+  "windows-31j",
+  "x-sjis",
+  "cseuckr",
+  "csksc56011987",
+  "iso-ir-149",
+  "korean",
+  "ks_c_5601-1987",
+  "ks_c_5601-1989",
+  "ksc5601",
+  "ksc_5601",
+  "windows-949",
+  "utf-16",
 ];
 
 export function decode(content: ArrayBuffer, encoding: string): string {
diff --git a/frontend/src/utils/index.ts b/frontend/src/utils/index.ts
index d7f0bd9b..faca1539 100644
--- a/frontend/src/utils/index.ts
+++ b/frontend/src/utils/index.ts
@@ -4,3 +4,25 @@ import { partial } from "filesize";
  * Formats filesize as KiB/MiB/...
  */
 export const filesize = partial({ base: 2 });
+
+export const vClickOutside = {
+  created(el: HTMLElement, binding: any) {
+    el.clickOutsideEvent = (event: Event) => {
+      const target = event.target;
+
+      if (target instanceof Node) {
+        if (!el.contains(target)) {
+          binding.value(event);
+        }
+      }
+    };
+
+    document.addEventListener("click", el.clickOutsideEvent);
+  },
+
+  unmounted(el: HTMLElement) {
+    if (el.clickOutsideEvent) {
+      document.removeEventListener("click", el.clickOutsideEvent);
+    }
+  },
+};
diff --git a/frontend/src/views/files/Preview.vue b/frontend/src/views/files/Preview.vue
index 9a67de2d..2a60e7df 100644
--- a/frontend/src/views/files/Preview.vue
+++ b/frontend/src/views/files/Preview.vue
@@ -311,7 +311,11 @@ const isPdf = computed(() => fileStore.req?.extension.toLowerCase() == ".pdf");
 const isEpub = computed(
   () => fileStore.req?.extension.toLowerCase() == ".epub"
 );
-const isCsv = computed(() => fileStore.req?.extension.toLowerCase() == ".csv");
+const isCsv = computed(
+  () =>
+    fileStore.req?.extension.toLowerCase() == ".csv" &&
+    fileStore.req.size <= CSV_MAX_SIZE
+);
 
 const isResizeEnabled = computed(() => resizePreview);
 
diff --git a/http/resource.go b/http/resource.go
index 7066f35a..f528473d 100644
--- a/http/resource.go
+++ b/http/resource.go
@@ -43,7 +43,7 @@ var resourceGetHandler = withUser(func(w http.ResponseWriter, r *http.Request, d
 		return renderJSON(w, r, file)
 	} else if encoding == "true" {
 		if file.Type != "text" {
-			return http.StatusUnsupportedMediaType, fmt.Errorf("file is not a text file")
+			return renderJSON(w, r, file)
 		}
 
 		f, err := d.user.Fs.Open(r.URL.Path)