AK: Add new failable JsonArray::{append/set} functions

Move all old usages to the more explicit `JsonArray:must_{append/set}`

AK/JsonArray.h

@@ -61,9 +61,12 @@ public:
 
     [[nodiscard]] JsonValue take(size_t index) { return m_values.take(index); }
 
+    void must_append(JsonValue value) { m_values.append(move(value)); }
+    void must_set(size_t index, JsonValue value) { m_values.insert(index, move(value)); }
+
     void clear() { m_values.clear(); }
-    void append(JsonValue value) { m_values.append(move(value)); }
+    ErrorOr<void> append(JsonValue value) { return m_values.try_append(move(value)); }
-    void set(size_t index, JsonValue value) { m_values[index] = move(value); }
+    ErrorOr<void> set(size_t index, JsonValue value) { return m_values.try_insert(index, move(value)); }
 
     template<typename Builder>
     typename Builder::OutputType serialized() const;

AK/JsonParser.cpp

@@ -164,7 +164,7 @@ ErrorOr<JsonValue> JsonParser::parse_array()
         if (peek() == ']')
             break;
         auto element = TRY(parse_helper());
-        array.append(move(element));
+        array.must_append(move(element));
         ignore_while(is_space);
         if (peek() == ']')
             break;

Userland/Applications/KeyboardMapper/KeyboardMapperWidget.cpp

@@ -177,7 +177,7 @@ ErrorOr<void> KeyboardMapperWidget::save_to_file(StringView filename)
                 sb.append_code_point(values[i]);
 
             JsonValue val(sb.to_deprecated_string());
-            items.append(move(val));
+            items.must_append(move(val));
         }
         map_json.set(name, move(items));
     };

Userland/Applications/Spreadsheet/ExportDialog.cpp

@@ -202,7 +202,7 @@ ErrorOr<void> ExportDialog::make_and_run_for(StringView mime, Core::File& file,
     auto export_worksheet = [&]() -> ErrorOr<void> {
         JsonArray array;
         for (auto& sheet : workbook.sheets())
-            array.append(sheet->to_json());
+            array.must_append(sheet->to_json());
 
         auto file_content = array.to_deprecated_string();
         return file.write_until_depleted(file_content.bytes());

Userland/Applications/Spreadsheet/Spreadsheet.cpp

@@ -542,7 +542,7 @@ JsonObject Sheet::to_json() const
     if (!columns_are_standard()) {
         auto columns = JsonArray();
         for (auto& column : m_columns)
-            columns.append(column);
+            columns.must_append(column);
         object.set("columns", move(columns));
     }
     object.set("rows", bottom_right.row + 1);
@@ -587,7 +587,7 @@ JsonObject Sheet::to_json() const
             fmt_object.set("condition", fmt.condition);
             save_format(fmt, fmt_object);
 
-            conditional_formats.append(move(fmt_object));
+            conditional_formats.must_append(move(fmt_object));
         }
 
         data.set("conditional_formats", move(conditional_formats));

Userland/Libraries/LibCore/EventLoop.cpp

@@ -260,7 +260,7 @@ public:
             for (auto& object : Object::all_objects()) {
                 JsonObject json_object;
                 object.save_to(json_object);
-                objects.append(move(json_object));
+                objects.must_append(move(json_object));
             }
             response.set("objects", move(objects));
             send_response(response);

Userland/Libraries/LibCore/Object.h

@@ -335,8 +335,8 @@ requires IsBaseOf<Object, T>
         [this] {                                               \
             auto size = this->getter();                        \
             JsonArray size_array;                              \
-            size_array.append(size.width());                   \
+            size_array.must_append(size.width());              \
-            size_array.append(size.height());                  \
+            size_array.must_append(size.height());             \
             return size_array;                                 \
         },                                                     \
         {});
@@ -379,8 +379,8 @@ requires IsBaseOf<Object, T>
         [this] {                                              \
             auto size = this->getter();                       \
             JsonArray size_array;                             \
-            size_array.append(size.width());                  \
+            size_array.must_append(size.width());             \
-            size_array.append(size.height());                 \
+            size_array.must_append(size.height());            \
             return size_array;                                \
         },                                                    \
         [this](auto& value) {                                 \

Userland/Libraries/LibGUI/JsonArrayModel.cpp

@@ -67,7 +67,7 @@ bool JsonArrayModel::add(Vector<JsonValue> const&& values)
         auto& field_spec = m_fields[i];
         obj.set(field_spec.json_field_name, values.at(i));
     }
-    m_array.append(move(obj));
+    m_array.must_append(move(obj));
     did_update();
     return true;
 }
@@ -85,7 +85,7 @@ bool JsonArrayModel::set(int row, Vector<JsonValue>&& values)
         obj.set(field_spec.json_field_name, move(values.at(i)));
     }
 
-    m_array.set(row, move(obj));
+    m_array.must_set(row, move(obj));
     did_update();
 
     return true;
@@ -99,7 +99,7 @@ bool JsonArrayModel::remove(int row)
     JsonArray new_array;
     for (size_t i = 0; i < m_array.size(); ++i)
         if (i != (size_t)row)
-            new_array.append(m_array.at(i));
+            new_array.must_append(m_array.at(i));
 
     m_array = new_array;
 

Userland/Libraries/LibGUI/Layout.cpp

@@ -34,7 +34,7 @@ Layout::Layout(Margins initial_margins, int spacing)
                 } else {
                     VERIFY_NOT_REACHED();
                 }
-                entries_array.append(move(entry_object));
+                entries_array.must_append(move(entry_object));
             }
             return entries_array;
         });

Userland/Libraries/LibWeb/WebDriver/Capabilities.cpp

@@ -347,7 +347,7 @@ Response process_capabilities(JsonValue const& parameters)
         all_first_match_capabilities = capabilities->as_array();
     } else {
         // a. If all first match capabilities is undefined, set the value to a JSON List with a single entry of an empty JSON Object.
-        all_first_match_capabilities.append(JsonObject {});
+        all_first_match_capabilities.must_append(JsonObject {});
     }
 
     // 4. Let validated first match capabilities be an empty JSON List.
@@ -360,7 +360,7 @@ Response process_capabilities(JsonValue const& parameters)
         auto validated_capabilities = TRY(validate_capabilities(first_match_capabilities));
 
         // b. Append validated capabilities to validated first match capabilities.
-        validated_first_match_capabilities.append(move(validated_capabilities));
+        validated_first_match_capabilities.must_append(move(validated_capabilities));
         return {};
     }));
 
@@ -374,7 +374,7 @@ Response process_capabilities(JsonValue const& parameters)
         auto merged = TRY(merge_capabilities(required_capabilities, first_match_capabilities.as_object()));
 
         // b. Append merged to merged capabilities.
-        merged_capabilities.append(move(merged));
+        merged_capabilities.must_append(move(merged));
         return {};
     }));
 

Userland/Libraries/LibWeb/WebDriver/ExecuteScript.cpp

@@ -170,7 +170,7 @@ static ErrorOr<JsonValue, ExecuteScriptResultType> clone_an_object(JS::Realm& re
                 return ExecuteScriptResultType::JavaScriptError;
             auto array = JsonArray {};
             for (size_t i = 0; i < length; ++i)
-                array.append(JsonValue {});
+                array.must_append(JsonValue {});
             return array;
         }
         // -> Otherwise
@@ -203,7 +203,7 @@ static ErrorOr<JsonValue, ExecuteScriptResultType> clone_an_object(JS::Realm& re
                 [&](JsonArray& array) {
                     // NOTE: If this was a JS array, only indexed properties would be serialized anyway.
                     if (name.is_number())
-                        array.set(name.as_number(), cloned_property_result.value());
+                        array.must_set(name.as_number(), cloned_property_result.value());
                 },
                 [&](JsonObject& object) {
                     object.set(name.to_string(), cloned_property_result.value());

Userland/Services/WebContent/WebDriverConnection.cpp

@@ -1521,7 +1521,7 @@ Messages::WebDriverClient::GetAllCookiesResponse WebDriverConnection::get_all_co
         auto serialized_cookie = serialize_cookie(cookie);
 
         // 2. Append serialized cookie to cookies
-        cookies.append(move(serialized_cookie));
+        cookies.must_append(move(serialized_cookie));
     }
 
     // 5. Return success with data cookies.
@@ -1997,7 +1997,7 @@ ErrorOr<JsonArray, Web::WebDriver::Error> WebDriverConnection::find(StartNodeGet
 
     // 8. For each element in elements returned, append the web element reference object for element, to result.
     for (size_t i = 0; i < elements->length(); ++i)
-        result.append(web_element_reference_object(*elements->item(i)));
+        result.must_append(web_element_reference_object(*elements->item(i)));
 
     // 9. Return success with data result.
     return result;

Userland/Services/WebDriver/Session.cpp

@@ -162,7 +162,7 @@ Web::WebDriver::Response Session::get_window_handles() const
 
     // 2. For each top-level browsing context in the remote end, push the associated window handle onto handles.
     for (auto const& window_handle : m_windows.keys()) {
-        handles.append(JsonValue(window_handle));
+        handles.must_append(JsonValue(window_handle));
     }
 
     // 3. Return success with data handles.

Userland/Shell/Shell.cpp

@@ -2367,7 +2367,7 @@ void Shell::save_to(JsonObject& object)
         job_object.set("running_time", job_entry.value->timer().elapsed());
         job_object.set("command", job_entry.value->cmd());
         job_object.set("is_running_in_background", job_entry.value->is_running_in_background());
-        job_objects.append(move(job_object));
+        job_objects.must_append(move(job_object));
     }
     object.set("jobs", move(job_objects));
 }