Feature: allow to erase freeform values if there are no mappings

langs/en.json

@@ -217,6 +217,7 @@
         },
         "enableGeolocationForSafari": "Did you not get the popup to ask for geopermission?",
         "enableGeolocationForSafariLink": "Learn how to enable the geolocation permission in settings",
+        "eraseValue": "Erase this value",
         "error": "Something went wrong",
         "example": "Example",
         "examples": "Examples",

src/UI/InputElement/ValidatedInput.svelte

@@ -28,8 +28,12 @@
    * This is only copied to 'value' when appropriate so that no invalid values leak outside;
    * Additionally, the unit is added when copying
    */
-  let _value = new UIEventSource(value.data ?? "")
+  export let unvalidatedText = new UIEventSource(value.data ?? "")
 
+  
+  if(unvalidatedText == /*Compare by reference!*/ value){
+    throw "Value and unvalidatedText may not be the same store!"
+  }
   let validator: Validator = Validators.get(type ?? "string")
   if (validator === undefined) {
     console.warn("Didn't find a validator for type", type)
@@ -41,13 +45,13 @@
     if (unit && value.data) {
       const [v, denom] = unit?.findDenomination(value.data, getCountry)
       if (denom) {
-        _value.setData(v)
+        unvalidatedText.setData(v)
         selectedUnit.setData(denom.canonical)
       } else {
-        _value.setData(value.data ?? "")
+        unvalidatedText.setData(value.data ?? "")
       }
     } else {
-      _value.setData(value.data ?? "")
+      unvalidatedText.setData(value.data ?? "")
     }
   }
 
@@ -67,8 +71,8 @@
     validator = Validators.get(type ?? "string")
 
     _placeholder = placeholder ?? validator?.getPlaceholder() ?? type
-    if (_value.data?.length > 0) {
+    if (unvalidatedText.data?.length > 0) {
-      feedback?.setData(validator?.getFeedback(_value.data, getCountry))
+      feedback?.setData(validator?.getFeedback(unvalidatedText.data, getCountry))
     } else {
       feedback?.setData(undefined)
     }
@@ -78,7 +82,7 @@
 
   function setValues() {
     // Update the value stores
-    const v = _value.data
+    const v = unvalidatedText.data
     if (v === "") {
       value.setData(undefined)
       feedback?.setData(undefined)
@@ -103,12 +107,12 @@
     }
   }
 
-  onDestroy(_value.addCallbackAndRun((_) => setValues()))
+  onDestroy(unvalidatedText.addCallbackAndRun((_) => setValues()))
   if (unit === undefined) {
     onDestroy(
       value.addCallbackAndRunD((fromUpstream) => {
-        if (_value.data !== fromUpstream && fromUpstream !== "") {
+        if (unvalidatedText.data !== fromUpstream && fromUpstream !== "") {
-          _value.setData(fromUpstream)
+          unvalidatedText.setData(fromUpstream)
         }
       })
     )
@@ -131,7 +135,7 @@
     )
   }
 
-  const isValid = _value.map((v) => validator?.isValid(v, getCountry) ?? true)
+  const isValid = unvalidatedText.map((v) => validator?.isValid(v, getCountry) ?? true)
 
   let htmlElem: HTMLInputElement | HTMLTextAreaElement
 
@@ -149,7 +153,7 @@
 {#if validator?.textArea}
   <textarea
     class="w-full"
-    bind:value={$_value}
+    bind:value={$unvalidatedText}
     inputmode={validator?.inputmode ?? "text"}
     placeholder={_placeholder}
     bind:this={htmlElem}
@@ -159,7 +163,7 @@
   <div class={twMerge("inline-flex", cls)}>
     <input
       bind:this={htmlElem}
-      bind:value={$_value}
+      bind:value={$unvalidatedText}
       class="w-full"
       inputmode={validator?.inputmode ?? "text"}
       placeholder={_placeholder}
@@ -170,7 +174,7 @@
     {/if}
 
     {#if unit !== undefined}
-      <UnitInput {unit} {selectedUnit} textValue={_value} upstreamValue={value} {getCountry} />
+      <UnitInput {unit} {selectedUnit} textValue={unvalidatedText} upstreamValue={value} {getCountry} />
     {/if}
   </div>
 {/if}

src/UI/Popup/TagRendering/FreeformInput.svelte

@@ -12,6 +12,7 @@
   import type { SpecialVisualizationState } from "../../SpecialVisualization"
 
   export let value: UIEventSource<string>
+  export let unvalidatedText: UIEventSource<string> = new UIEventSource<string>(value.data)
   export let config: TagRenderingConfig
   export let tags: UIEventSource<Record<string, string>>
 
@@ -64,6 +65,7 @@
       type={config.freeform.type}
       {placeholder}
       {value}
+      {unvalidatedText}
     />
   {/if}
 
@@ -74,5 +76,6 @@
     {value}
     {state}
     on:submit
+    {unvalidatedText}
   />
 </div>

src/UI/Popup/TagRendering/TagRenderingEditable.svelte

@@ -87,6 +87,7 @@
         {state}
         {layer}
         on:saved={() => (editMode = false)}
+        allowDeleteOfFreeform={true}
       >
         <button
           slot="cancel"

src/UI/Popup/TagRendering/TagRenderingQuestion.svelte

@@ -22,17 +22,23 @@
   import { Unit } from "../../../Models/Unit"
   import UserRelatedState from "../../../Logic/State/UserRelatedState"
   import { twJoin } from "tailwind-merge"
+  import type { UploadableTag } from "../../../Logic/Tags/TagUtils"
   import { TagUtils } from "../../../Logic/Tags/TagUtils"
+
   import Search from "../../../assets/svg/Search.svelte"
   import Login from "../../../assets/svg/Login.svelte"
   import { placeholder } from "../../../Utils/placeholder"
+  import { TrashIcon } from "@rgossiaux/svelte-heroicons/solid"
+  import { Tag } from "../../../Logic/Tags/Tag"
 
   export let config: TagRenderingConfig
   export let tags: UIEventSource<Record<string, string>>
   export let selectedElement: Feature
   export let state: SpecialVisualizationState
   export let layer: LayerConfig | undefined
-  export let selectedTags: TagsFilter = undefined
+  export let selectedTags: UploadableTag = undefined
+
+  export let allowDeleteOfFreeform: boolean = false
 
   let feedback: UIEventSource<Translation> = new UIEventSource<Translation>(undefined)
 
@@ -40,6 +46,8 @@
 
   // Will be bound if a freeform is available
   let freeformInput = new UIEventSource<string>(tags?.[config.freeform?.key])
+  let freeformInputUnvalidated = new UIEventSource<string>(freeformInput.data)
+  
   let selectedMapping: number = undefined
   /**
    * A list of booleans, used if multiAnswer is set
@@ -145,6 +153,10 @@
     }
   })
   $: {
+    if (allowDeleteOfFreeform && $freeformInput === undefined && $freeformInputUnvalidated === "" && mappings.length === 0) {
+      selectedTags = new Tag(config.freeform.key, "")
+    } else {
+
       try {
         selectedTags = config?.constructChangeSpecification(
           $freeformInput,
@@ -157,8 +169,11 @@
         selectedTags = undefined
       }
     }
+  }
+
+  function onSave(e = undefined, deleteFreeform = false) {
+    console.log("On click", deleteFreeform, ">>>", selectedTags)
 
-  function onSave(e) {
     if (selectedTags === undefined) {
       return
     }
@@ -199,7 +214,7 @@
     if (e.key === "Enter") {
       e.preventDefault()
       e.stopPropagation()
-        onSave(e)
+      onSave()
     }
   }
 
@@ -269,6 +284,7 @@
             {state}
             feature={selectedElement}
             value={freeformInput}
+            unvalidatedText={freeformInputUnvalidated}
             on:submit={onSave}
           />
         {:else if mappings !== undefined && !config.multiAnswer}
@@ -311,6 +327,7 @@
                   {state}
                   feature={selectedElement}
                   value={freeformInput}
+                  unvalidatedText={freeformInputUnvalidated}
                   on:selected={() => (selectedMapping = config.mappings?.length)}
                   on:submit={onSave}
                 />
@@ -354,6 +371,7 @@
                   {state}
                   feature={selectedElement}
                   value={freeformInput}
+                  unvalidatedText={freeformInputUnvalidated}
                   on:submit={onSave}
                 />
               </label>
@@ -378,12 +396,19 @@
             <!-- TagRenderingQuestion-buttons -->
             <slot name="cancel" />
             <slot name="save-button" {selectedTags}>
+              {#if allowDeleteOfFreeform && mappings.length === 0 && $freeformInput === undefined && $freeformInputUnvalidated === ""}
+                <button class="primary flex" on:click|stopPropagation|preventDefault={_ => onSave(_, true)}>
+                  <TrashIcon class="w-6 h-6 text-red-500" />
+                  <Tr t={Translations.t.general.eraseValue}/>
+                </button>
+              {:else}
                 <button
                   on:click={onSave}
                   class={twJoin(selectedTags === undefined ? "disabled" : "button-shadow", "primary")}
                 >
                   <Tr t={Translations.t.general.save} />
                 </button>
+              {/if}
             </slot>
           </div>
           {#if UserRelatedState.SHOW_TAGS_VALUES.indexOf($showTags) >= 0 || ($showTags === "" && numberOfCs >= Constants.userJourney.tagsVisibleAt) || $featureSwitchIsTesting || $featureSwitchIsDebugging}