refactor: use subclasses for different item types

lang/de.json

@@ -257,11 +257,11 @@
     "DS4.ErrorSlayingDiceRecursionLimitExceeded": "Die maximale Rekursionstiefe für slayende Würfelwürfe wurde überschritten.",
     "DS4.ErrorInvalidNumberOfDice": "Ungültige Anzahl an Würfeln.",
     "DS4.ErrorInvalidActorType": "Ungültiger Aktortyp '{type}'.",
+    "DS4.ErrorInvalidItemType": "Ungültiger Itemtyp '{type}'.",
     "DS4.ErrorDuringMigration": "Fehler während der Aktualisierung des DS4 Systems von Migrationsversion {currentVersion} auf {targetVersion}. Der Fehler trat während der Ausführung des Migrationsskripts mit der Version {migrationVersion} auf. Spätere Migrationsskripte wurden nicht ausgeführt. Mehr Details finden Sie in der Entwicklerkonsole (F12).",
     "DS4.ErrorDuringCompendiumMigration": "Fehler während der Aktualisierung Kompendiums '{pack}' für DS4 von Migrationsversion {currentVersion} auf {targetVersion}. Der Fehler trat während der Ausführung des Migrationsskripts mit der Version {migrationVersion} auf. Spätere Migrationsskripte wurden nicht ausgeführt. Mehr Details finden Sie in der Entwicklerkonsole (F12).",
     "DS4.ErrorCannotRollUnownedItem": "Für das Item '{name}' ({id}) kann nicht gewürfelt werden, da es keinem Aktor gehört.",
     "DS4.ErrorRollingForItemTypeNotPossible": "Würfeln ist für Items vom Typ '{type}' nicht möglich.",
-    "DS4.ErrorWrongItemType": "Ein Item vom Type '{expectedType}' wurde erwartet aber das Item '{name}' ({id}) ist vom Typ '{actualType}'.",
     "DS4.ErrorUnexpectedAttackType": "Unerwartete Angriffsart '{actualType}', erwartete Angriffsarten: {expectedTypes}",
     "DS4.ErrorUnexpectedAttribute": "Unerwartetes Attribut '{actualAttribute}', erwartete Attribute: {expectedTypes}",
     "DS4.ErrorUnexpectedTrait": "Unerwartete Eigenschaft '{actualTrait}', erwartete Eigenschaften: {expectedTypes}",

lang/en.json

@@ -257,11 +257,11 @@
     "DS4.ErrorSlayingDiceRecursionLimitExceeded": "Maximum recursion depth for slaying dice roll exceeded.",
     "DS4.ErrorInvalidNumberOfDice": "Invalid number of dice.",
     "DS4.ErrorInvalidActorType": "Invalid actor type '{type}'.",
+    "DS4.ErrorInvalidItemType": "Invalid item type '{type}'.",
     "DS4.ErrorDuringMigration": "Error while migrating DS4 system from migration version {currentVersion} to {targetVersion}. The error occurred during execution of migration script with version {migrationVersion}. Later migrations have not been executed. For more details, please look at the development console (F12).",
     "DS4.ErrorDuringCompendiumMigration": "Error while migrating compendium '{pack}' for DS4 from migration version {currentVersion} to {targetVersion}. The error occurred during execution of migration script with version {migrationVersion}. Later migrations have not been executed. For more details, please look at the development console (F12).",
     "DS4.ErrorCannotRollUnownedItem": "Rolling for item '{name}' ({id})is not possible because it is not owned.",
     "DS4.ErrorRollingForItemTypeNotPossible": "Rolling is not possible for items of type '{type}'.",
-    "DS4.ErrorWrongItemType": "Expected an item of type '{expectedType}' but item '{name}' ({id}) is of type '{actualType}'.",
     "DS4.ErrorUnexpectedAttackType": "Unexpected attack type '{actualType}', expected it to be one of: {expectedTypes}",
     "DS4.ErrorUnexpectedAttribute": "Unexpected attribute '{actualAttribute}', expected it to be one of: {expectedTypes}",
     "DS4.ErrorUnexpectedTrait": "Unexpected trait '{actualTrait}', expected it to be one of: {expectedTypes}",

spec/item/spell/calculate-spell-price.spec.ts

@@ -2,8 +2,8 @@
 //
 // SPDX-License-Identifier: MIT
 
-import { CooldownDuration, DS4SpellDataSourceData } from "../../../src/item/item-data-source";
-import { calculateSpellPrice } from "../../../src/item/type-specific-helpers/spell";
+import { CooldownDuration, DS4SpellDataSourceData } from "../../../src/item/spell/spell-data-source";
+import { calculateSpellPrice } from "../../../src/item/spell/calculate-spell-price";
 
 const defaultData: DS4SpellDataSourceData = {
     description: "",

src/actor/actor.ts

@@ -6,9 +6,10 @@
 import { ModifiableDataBaseTotal } from "../common/common-data";
 import { DS4 } from "../config";
 import { getGame } from "../helpers";
+import { DS4ArmorDataProperties } from "../item/armor/armor-data-properties";
 import { DS4Item } from "../item/item";
-import { DS4ArmorDataProperties, DS4ShieldDataProperties } from "../item/item-data-properties";
 import { ItemType } from "../item/item-data-source";
+import { DS4ShieldDataProperties } from "../item/shield/shield-data-properties";
 import { createCheckRoll } from "../rolls/check-factory";
 import { Check } from "./actor-data-properties-base";
 import { isAttribute, isTrait } from "./actor-data-source-base";

src/hooks/init.ts

@@ -26,6 +26,7 @@ import { DS4Roll } from "../rolls/roll";
 import registerSlayingDiceModifier from "../rolls/slaying-dice-modifier";
 import { registerSystemSettings } from "../settings";
 import { DS4TokenDocument } from "../token-document";
+import { DS4ItemProxy } from "../item/proxy";
 
 export default function registerForInitHook(): void {
     Hooks.once("init", init);
@@ -36,7 +37,7 @@ async function init() {
 
     getGame().ds4 = {
         DS4Actor: DS4ActorProxy,
-        DS4Item,
+        DS4Item: DS4ItemProxy,
         DS4,
         createCheckRoll,
         migration,
@@ -46,7 +47,7 @@ async function init() {
     CONFIG.DS4 = DS4;
 
     CONFIG.Actor.documentClass = DS4ActorProxy;
-    CONFIG.Item.documentClass = DS4Item;
+    CONFIG.Item.documentClass = DS4ItemProxy;
     CONFIG.ActiveEffect.documentClass = DS4ActiveEffect;
     CONFIG.ChatMessage.documentClass = DS4ChatMessage;
     CONFIG.Token.documentClass = DS4TokenDocument;

src/item/alphabet/alphabet-data-properties.ts

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4AlphabetDataSourceData } from "./alphabet-data-source";
+
+export interface DS4AlphabetDataProperties {
+    type: "alphabet";
+    data: DS4AlphabetDataPropertiesData;
+}
+
+interface DS4AlphabetDataPropertiesData extends DS4AlphabetDataSourceData, DS4ItemDataPropertiesDataRollable {}

src/item/alphabet/alphabet-data-source.ts

@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataSourceDataBase } from "../item-data-source-base";
+
+export interface DS4AlphabetDataSource {
+    type: "alphabet";
+    data: DS4AlphabetDataSourceData;
+}
+
+export type DS4AlphabetDataSourceData = DS4ItemDataSourceDataBase;

src/item/alphabet/alphabet.ts

@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4Item } from "../item";
+
+export class DS4Alphabet extends DS4Item {}
+
+export interface DS4Alphabet {
+    data: foundry.data.ItemData & { type: "alphabet"; _source: { type: "alphabet" } };
+}

src/item/armor/armor-data-properties.ts

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4ArmorDataSourceData } from "./armor-data-source";
+
+export interface DS4ArmorDataProperties {
+    type: "armor";
+    data: DS4ArmorDataPropertiesData;
+}
+
+interface DS4ArmorDataPropertiesData extends DS4ArmorDataSourceData, DS4ItemDataPropertiesDataRollable {}

src/item/armor/armor-data-source.ts

@@ -0,0 +1,25 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4 } from "../../config";
+import {
+    DS4ItemDataSourceDataBase,
+    DS4ItemDataSourceDataEquipable,
+    DS4ItemDataSourceDataPhysical,
+    DS4ItemDataSourceDataProtective,
+} from "../item-data-source-base";
+
+export interface DS4ArmorDataSource {
+    type: "armor";
+    data: DS4ArmorDataSourceData;
+}
+
+export interface DS4ArmorDataSourceData
+    extends DS4ItemDataSourceDataBase,
+        DS4ItemDataSourceDataPhysical,
+        DS4ItemDataSourceDataEquipable,
+        DS4ItemDataSourceDataProtective {
+    armorMaterialType: keyof typeof DS4.i18n.armorMaterialTypes;
+    armorType: keyof typeof DS4.i18n.armorTypes;
+}

src/item/armor/armor.ts

@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4Item } from "../item";
+
+export class DS4Armor extends DS4Item {}
+
+export interface DS4Armor {
+    data: foundry.data.ItemData & { type: "armor"; _source: { type: "armor" } };
+}

src/item/equipment/equipment-data-properties.ts

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4EquipmentDataSourceData } from "./equipment-data-source";
+
+export interface DS4EquipmentDataProperties {
+    type: "equipment";
+    data: DS4EquipmentDataPropertiesData;
+}
+
+interface DS4EquipmentDataPropertiesData extends DS4EquipmentDataSourceData, DS4ItemDataPropertiesDataRollable {}

src/item/equipment/equipment-data-source.ts

@@ -0,0 +1,19 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import {
+    DS4ItemDataSourceDataBase,
+    DS4ItemDataSourceDataEquipable,
+    DS4ItemDataSourceDataPhysical,
+} from "../item-data-source-base";
+
+export interface DS4EquipmentDataSource {
+    type: "equipment";
+    data: DS4EquipmentDataSourceData;
+}
+
+export interface DS4EquipmentDataSourceData
+    extends DS4ItemDataSourceDataBase,
+        DS4ItemDataSourceDataPhysical,
+        DS4ItemDataSourceDataEquipable {}

src/item/equipment/equipment.ts

@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4Item } from "../item";
+
+export class DS4Equipment extends DS4Item {}
+
+export interface DS4Equipment {
+    data: foundry.data.ItemData & { type: "equipment"; _source: { type: "equipment" } };
+}

src/item/item-data-properties-base.ts

@@ -0,0 +1,7 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+export interface DS4ItemDataPropertiesDataRollable {
+    rollable: boolean;
+}

src/item/item-data-properties.ts

@@ -1,21 +1,18 @@
-// SPDX-FileCopyrightText: 2021 Johannes Loher
+// SPDX-FileCopyrightText: 2022 Johannes Loher
 //
 // SPDX-License-Identifier: MIT
 
-import { ModifiableDataBaseTotalMax } from "../common/common-data";
-import {
-    DS4AlphabetDataSourceData,
-    DS4ArmorDataSourceData,
-    DS4EquipmentDataSourceData,
-    DS4LanguageDataSourceData,
-    DS4LootDataSourceData,
-    DS4RacialAbilityDataSourceData,
-    DS4ShieldDataSourceData,
-    DS4SpecialCreatureAbilityDataSourceData,
-    DS4SpellDataSourceData,
-    DS4TalentDataSourceData,
-    DS4WeaponDataSourceData,
-} from "./item-data-source";
+import { DS4AlphabetDataProperties } from "./alphabet/alphabet-data-properties";
+import { DS4ArmorDataProperties } from "./armor/armor-data-properties";
+import { DS4EquipmentDataProperties } from "./equipment/equipment-data-properties";
+import { DS4LanguageDataProperties } from "./language/language-data-properties";
+import { DS4LootDataProperties } from "./loot/loot-data-properties";
+import { DS4RacialAbilityDataProperties } from "./racial-ability/racial-ability-data-properties";
+import { DS4ShieldDataProperties } from "./shield/shield-data-properties";
+import { DS4SpecialCreatureAbilityDataProperties } from "./special-creature-ability/special-creature-ability-data-properties";
+import { DS4SpellDataProperties } from "./spell/spell-data-properties";
+import { DS4TalentDataProperties } from "./talent/talent-data-properties";
+import { DS4WeaponDataProperties } from "./weapon/weapon-data-properties";
 
 declare global {
     interface DataConfig {
@@ -24,107 +21,14 @@ declare global {
 }
 
 export type DS4ItemDataProperties =
-    | DS4WeaponDataProperties
-    | DS4ArmorDataProperties
-    | DS4ShieldDataProperties
-    | DS4SpellDataProperties
-    | DS4EquipmentDataProperties
-    | DS4LootDataProperties
-    | DS4TalentDataProperties
-    | DS4RacialAbilityDataProperties
-    | DS4LanguageDataProperties
     | DS4AlphabetDataProperties
-    | DS4SpecialCreatureAbilityDataProperties;
-
-export interface DS4WeaponDataProperties {
-    type: "weapon";
-    data: DS4WeaponDataPropertiesData;
-}
-
-export interface DS4ArmorDataProperties {
-    type: "armor";
-    data: DS4ArmorDataPropertiesData;
-}
-
-export interface DS4ShieldDataProperties {
-    type: "shield";
-    data: DS4ShieldDataPropertiesData;
-}
-
-export interface DS4SpellDataProperties {
-    type: "spell";
-    data: DS4SpellDataPropertiesData;
-}
-
-export interface DS4EquipmentDataProperties {
-    type: "equipment";
-    data: DS4EquipmentDataPropertiesData;
-}
-
-export interface DS4LootDataProperties {
-    type: "loot";
-    data: DS4LootDataPropertiesData;
-}
-
-export interface DS4TalentDataProperties {
-    type: "talent";
-    data: DS4TalentDataPropertiesData;
-}
-
-export interface DS4RacialAbilityDataProperties {
-    type: "racialAbility";
-    data: DS4RacialAbilityDataPropertiesData;
-}
-
-export interface DS4LanguageDataProperties {
-    type: "language";
-    data: DS4LanguageDataPropertiesData;
-}
-
-export interface DS4AlphabetDataProperties {
-    type: "alphabet";
-    data: DS4AlphabetDataPropertiesData;
-}
-
-export interface DS4SpecialCreatureAbilityDataProperties {
-    type: "specialCreatureAbility";
-    data: DS4SpecialCreatureAbilityDataPropertiesData;
-}
-
-// templates
-
-interface DS4ItemDataPropertiesDataRollable {
-    rollable: boolean;
-}
-
-//types
-
-interface DS4WeaponDataPropertiesData extends DS4WeaponDataSourceData, DS4ItemDataPropertiesDataRollable {}
-
-interface DS4ArmorDataPropertiesData extends DS4ArmorDataSourceData, DS4ItemDataPropertiesDataRollable {}
-
-interface DS4ShieldDataPropertiesData extends DS4ShieldDataSourceData, DS4ItemDataPropertiesDataRollable {}
-
-interface DS4SpellDataPropertiesData extends DS4SpellDataSourceData, DS4ItemDataPropertiesDataRollable {
-    price: number | null;
-}
-
-interface DS4EquipmentDataPropertiesData extends DS4EquipmentDataSourceData, DS4ItemDataPropertiesDataRollable {}
-
-interface DS4LootDataPropertiesData extends DS4LootDataSourceData, DS4ItemDataPropertiesDataRollable {}
-
-interface DS4TalentDataPropertiesData extends DS4TalentDataSourceData, DS4ItemDataPropertiesDataRollable {
-    rank: ModifiableDataBaseTotalMax<number>;
-}
-
-interface DS4RacialAbilityDataPropertiesData
-    extends DS4RacialAbilityDataSourceData,
-        DS4ItemDataPropertiesDataRollable {}
-
-interface DS4LanguageDataPropertiesData extends DS4LanguageDataSourceData, DS4ItemDataPropertiesDataRollable {}
-
-interface DS4AlphabetDataPropertiesData extends DS4AlphabetDataSourceData, DS4ItemDataPropertiesDataRollable {}
-
-interface DS4SpecialCreatureAbilityDataPropertiesData
-    extends DS4SpecialCreatureAbilityDataSourceData,
-        DS4ItemDataPropertiesDataRollable {}
+    | DS4ArmorDataProperties
+    | DS4EquipmentDataProperties
+    | DS4LanguageDataProperties
+    | DS4LootDataProperties
+    | DS4RacialAbilityDataProperties
+    | DS4ShieldDataProperties
+    | DS4SpecialCreatureAbilityDataProperties
+    | DS4SpellDataProperties
+    | DS4TalentDataProperties
+    | DS4WeaponDataProperties;

src/item/item-data-source-base.ts

@@ -0,0 +1,30 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+// SPDX-FileCopyrightText: 2021 Oliver Rümpelein
+// SPDX-FileCopyrightText: 2021 Gesina Schwalbe
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4 } from "../config";
+
+export interface DS4ItemDataSourceDataBase {
+    description: string;
+}
+
+export interface DS4ItemDataSourceDataPhysical {
+    quantity: number;
+    price: number;
+    availability: keyof typeof DS4.i18n.itemAvailabilities;
+    storageLocation: string;
+}
+
+export function isDS4ItemDataTypePhysical(input: foundry.data.ItemData["data"]): boolean {
+    return "quantity" in input && "price" in input && "availability" in input && "storageLocation" in input;
+}
+
+export interface DS4ItemDataSourceDataEquipable {
+    equipped: boolean;
+}
+
+export interface DS4ItemDataSourceDataProtective {
+    armorValue: number;
+}

src/item/item-data-source.ts

@@ -1,11 +1,19 @@
-// SPDX-FileCopyrightText: 2021 Johannes Loher
-// SPDX-FileCopyrightText: 2021 Oliver Rümpelein
-// SPDX-FileCopyrightText: 2021 Gesina Schwalbe
+// SPDX-FileCopyrightText: 2022 Johannes Loher
 //
 // SPDX-License-Identifier: MIT
 
-import { ModifiableDataBaseMax } from "../common/common-data";
 import { DS4 } from "../config";
+import { DS4AlphabetDataSource } from "./alphabet/alphabet-data-source";
+import { DS4ArmorDataSource } from "./armor/armor-data-source";
+import { DS4EquipmentDataSource } from "./equipment/equipment-data-source";
+import { DS4LanguageDataSource } from "./language/language-data-source";
+import { DS4LootDataSource } from "./loot/loot-data-source";
+import { DS4RacialAbilityDataSource } from "./racial-ability/racial-ability-data-source";
+import { DS4ShieldDataSource } from "./shield/shield-data-source";
+import { DS4SpecialCreatureAbilityDataSource } from "./special-creature-ability/special-creature-ability-data-source";
+import { DS4SpellDataSource } from "./spell/spell-data-source";
+import { DS4TalentDataSource } from "./talent/talent-data-source";
+import { DS4WeaponDataSource } from "./weapon/weapon-data-source";
 
 declare global {
     interface SourceConfig {
@@ -16,169 +24,14 @@ declare global {
 export type ItemType = keyof typeof DS4.i18n.itemTypes;
 
 export type DS4ItemDataSource =
-    | DS4WeaponDataSource
-    | DS4ArmorDataSource
-    | DS4ShieldDataSource
-    | DS4SpellDataSource
-    | DS4EquipmentDataSource
-    | DS4LootDataSource
-    | DS4TalentDataSource
-    | DS4RacialAbilityDataSource
-    | DS4LanguageDataSource
     | DS4AlphabetDataSource
-    | DS4SpecialCreatureAbilityDataSource;
-
-interface DS4WeaponDataSource {
-    type: "weapon";
-    data: DS4WeaponDataSourceData;
-}
-
-interface DS4ArmorDataSource {
-    type: "armor";
-    data: DS4ArmorDataSourceData;
-}
-
-interface DS4ShieldDataSource {
-    type: "shield";
-    data: DS4ShieldDataSourceData;
-}
-
-interface DS4SpellDataSource {
-    type: "spell";
-    data: DS4SpellDataSourceData;
-}
-
-interface DS4EquipmentDataSource {
-    type: "equipment";
-    data: DS4EquipmentDataSourceData;
-}
-
-interface DS4LootDataSource {
-    type: "loot";
-    data: DS4LootDataSourceData;
-}
-
-interface DS4TalentDataSource {
-    type: "talent";
-    data: DS4TalentDataSourceData;
-}
-
-interface DS4RacialAbilityDataSource {
-    type: "racialAbility";
-    data: DS4RacialAbilityDataSourceData;
-}
-
-interface DS4LanguageDataSource {
-    type: "language";
-    data: DS4LanguageDataSourceData;
-}
-
-interface DS4AlphabetDataSource {
-    type: "alphabet";
-    data: DS4AlphabetDataSourceData;
-}
-
-interface DS4SpecialCreatureAbilityDataSource {
-    type: "specialCreatureAbility";
-    data: DS4SpecialCreatureAbilityDataSourceData;
-}
-
-// templates
-
-interface DS4ItemDataSourceDataBase {
-    description: string;
-}
-
-interface DS4ItemDataSourceDataPhysical {
-    quantity: number;
-    price: number;
-    availability: keyof typeof DS4.i18n.itemAvailabilities;
-    storageLocation: string;
-}
-
-export function isDS4ItemDataTypePhysical(input: foundry.data.ItemData["data"]): boolean {
-    return "quantity" in input && "price" in input && "availability" in input && "storageLocation" in input;
-}
-
-interface DS4ItemDataSourceDataEquipable {
-    equipped: boolean;
-}
-
-interface DS4ItemDataSourceDataProtective {
-    armorValue: number;
-}
-
-// types
-
-export interface DS4WeaponDataSourceData
-    extends DS4ItemDataSourceDataBase,
-        DS4ItemDataSourceDataPhysical,
-        DS4ItemDataSourceDataEquipable {
-    attackType: AttackType;
-    weaponBonus: number;
-    opponentDefense: number;
-}
-
-export type AttackType = keyof typeof DS4.i18n.attackTypes;
-
-export interface DS4ArmorDataSourceData
-    extends DS4ItemDataSourceDataBase,
-        DS4ItemDataSourceDataPhysical,
-        DS4ItemDataSourceDataEquipable,
-        DS4ItemDataSourceDataProtective {
-    armorMaterialType: keyof typeof DS4.i18n.armorMaterialTypes;
-    armorType: keyof typeof DS4.i18n.armorTypes;
-}
-
-export interface DS4ShieldDataSourceData
-    extends DS4ItemDataSourceDataBase,
-        DS4ItemDataSourceDataPhysical,
-        DS4ItemDataSourceDataEquipable,
-        DS4ItemDataSourceDataProtective {}
-
-export type CooldownDuration = keyof typeof DS4.i18n.cooldownDurations;
-
-export interface DS4SpellDataSourceData extends DS4ItemDataSourceDataBase, DS4ItemDataSourceDataEquipable {
-    spellType: keyof typeof DS4.i18n.spellTypes;
-    bonus: string;
-    spellCategory: keyof typeof DS4.i18n.spellCategories;
-    maxDistance: UnitData<DistanceUnit>;
-    effectRadius: UnitData<DistanceUnit>;
-    duration: UnitData<TemporalUnit>;
-    cooldownDuration: CooldownDuration;
-    minimumLevels: {
-        healer: number | null;
-        wizard: number | null;
-        sorcerer: number | null;
-    };
-}
-
-export interface UnitData<UnitType> {
-    value: string;
-    unit: UnitType;
-}
-
-type DistanceUnit = keyof typeof DS4.i18n.distanceUnits;
-
-type TemporalUnit = keyof typeof DS4.i18n.temporalUnits;
-
-export interface DS4EquipmentDataSourceData
-    extends DS4ItemDataSourceDataBase,
-        DS4ItemDataSourceDataPhysical,
-        DS4ItemDataSourceDataEquipable {}
-
-export interface DS4LootDataSourceData extends DS4ItemDataSourceDataBase, DS4ItemDataSourceDataPhysical {}
-
-export interface DS4TalentDataSourceData extends DS4ItemDataSourceDataBase {
-    rank: ModifiableDataBaseMax<number>;
-}
-
-export type DS4RacialAbilityDataSourceData = DS4ItemDataSourceDataBase;
-
-export type DS4LanguageDataSourceData = DS4ItemDataSourceDataBase;
-
-export type DS4AlphabetDataSourceData = DS4ItemDataSourceDataBase;
-
-export interface DS4SpecialCreatureAbilityDataSourceData extends DS4ItemDataSourceDataBase {
-    experiencePoints: number;
-}
+    | DS4ArmorDataSource
+    | DS4EquipmentDataSource
+    | DS4LanguageDataSource
+    | DS4LootDataSource
+    | DS4RacialAbilityDataSource
+    | DS4ShieldDataSource
+    | DS4SpecialCreatureAbilityDataSource
+    | DS4SpellDataSource
+    | DS4TalentDataSource
+    | DS4WeaponDataSource;

src/item/item-sheet.ts

@@ -9,7 +9,7 @@ import { DS4 } from "../config";
 import { getGame } from "../helpers";
 import notifications from "../ui/notifications";
 import { enforce } from "../utils";
-import { isDS4ItemDataTypePhysical } from "./item-data-source";
+import { isDS4ItemDataTypePhysical } from "./item-data-source-base";
 
 /**
  * The Sheet class for DS4 Items

src/item/item.ts

@@ -3,12 +3,8 @@
 //
 // SPDX-License-Identifier: MIT
 
-import { DS4 } from "../config";
 import { getGame } from "../helpers";
-import { createCheckRoll } from "../rolls/check-factory";
-import notifications from "../ui/notifications";
-import { AttackType, ItemType } from "./item-data-source";
-import { calculateSpellPrice } from "./type-specific-helpers/spell";
+import { ItemType } from "./item-data-source";
 
 declare global {
     interface DocumentClassConfig {
@@ -27,18 +23,7 @@ export class DS4Item extends Item {
 
     /** @override */
     prepareDerivedData(): void {
-        if (this.data.type === "talent") {
-            const data = this.data.data;
-            data.rank.total = data.rank.base + data.rank.mod;
-        }
-        if (this.data.type === "weapon" || this.data.type === "spell") {
-            this.data.data.rollable = this.data.data.equipped;
-        } else {
-            this.data.data.rollable = false;
-        }
-        if (this.data.type === "spell") {
-            this.data.data.price = calculateSpellPrice(this.data.data);
-        }
+        this.data.data.rollable = false;
     }
 
     isNonEquippedEuipable(): boolean {
@@ -49,9 +34,6 @@ export class DS4Item extends Item {
      * The number of times that active effect changes originating from this item should be applied.
      */
     get activeEffectFactor(): number | undefined {
-        if (this.data.type === "talent") {
-            return this.data.data.rank.total;
-        }
         return 1;
     }
 
@@ -66,142 +48,8 @@ export class DS4Item extends Item {
      * Roll a check for an action with this item.
      * @param options - Additional options to customize the roll
      */
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
     async roll(options: { speaker?: { token?: TokenDocument; alias?: string } } = {}): Promise<void> {
-        switch (this.data.type) {
-            case "weapon":
-                return this.rollWeapon(options);
-            case "spell":
-                return this.rollSpell(options);
-            default:
-                throw new Error(
-                    getGame().i18n.format("DS4.ErrorRollingForItemTypeNotPossible", { type: this.data.type }),
-                );
-        }
-    }
-
-    protected async rollWeapon(options: { speaker?: { token?: TokenDocument; alias?: string } } = {}): Promise<void> {
-        if (!(this.data.type === "weapon")) {
-            throw new Error(
-                getGame().i18n.format("DS4.ErrorWrongItemType", {
-                    actualType: this.data.type,
-                    expectedType: "weapon",
-                    id: this.id,
-                    name: this.name,
-                }),
-            );
-        }
-
-        if (!this.data.data.equipped) {
-            return notifications.warn(
-                getGame().i18n.format("DS4.WarningItemMustBeEquippedToBeRolled", {
-                    name: this.name,
-                    id: this.id,
-                    type: this.data.type,
-                }),
-            );
-        }
-
-        if (!this.actor) {
-            throw new Error(getGame().i18n.format("DS4.ErrorCannotRollUnownedItem", { name: this.name, id: this.id }));
-        }
-
-        const ownerDataData = this.actor.data.data;
-        const weaponBonus = this.data.data.weaponBonus;
-        const combatValue = await this.getCombatValueKeyForAttackType(this.data.data.attackType);
-        const checkTargetNumber = ownerDataData.combatValues[combatValue].total + weaponBonus;
-
-        const speaker = ChatMessage.getSpeaker({ actor: this.actor, ...options.speaker });
-        await createCheckRoll(checkTargetNumber, {
-            rollMode: getGame().settings.get("core", "rollMode"),
-            maximumCoupResult: ownerDataData.rolling.maximumCoupResult,
-            minimumFumbleResult: ownerDataData.rolling.minimumFumbleResult,
-            flavor: "DS4.ItemWeaponCheckFlavor",
-            flavorData: { actor: speaker.alias ?? this.actor.name, weapon: this.name },
-            speaker,
-        });
-    }
-
-    protected async rollSpell(options: { speaker?: { token?: TokenDocument; alias?: string } } = {}): Promise<void> {
-        if (!(this.data.type === "spell")) {
-            throw new Error(
-                getGame().i18n.format("DS4.ErrorWrongItemType", {
-                    actualType: this.data.type,
-                    expectedType: "spell",
-                    id: this.id,
-                    name: this.name,
-                }),
-            );
-        }
-
-        if (!this.data.data.equipped) {
-            return notifications.warn(
-                getGame().i18n.format("DS4.WarningItemMustBeEquippedToBeRolled", {
-                    name: this.name,
-                    id: this.id,
-                    type: this.data.type,
-                }),
-            );
-        }
-
-        if (!this.actor) {
-            throw new Error(getGame().i18n.format("DS4.ErrorCannotRollUnownedItem", { name: this.name, id: this.id }));
-        }
-
-        const ownerDataData = this.actor.data.data;
-        const spellModifier = Number.isNumeric(this.data.data.bonus) ? parseInt(this.data.data.bonus) : undefined;
-        if (spellModifier === undefined) {
-            notifications.info(
-                getGame().i18n.format("DS4.InfoManuallyEnterSpellModifier", {
-                    name: this.name,
-                    spellModifier: this.data.data.bonus,
-                }),
-            );
-        }
-        const spellType = this.data.data.spellType;
-        const checkTargetNumber = ownerDataData.combatValues[spellType].total + (spellModifier ?? 0);
-
-        const speaker = ChatMessage.getSpeaker({ actor: this.actor, ...options.speaker });
-        await createCheckRoll(checkTargetNumber, {
-            rollMode: getGame().settings.get("core", "rollMode"),
-            maximumCoupResult: ownerDataData.rolling.maximumCoupResult,
-            minimumFumbleResult: ownerDataData.rolling.minimumFumbleResult,
-            flavor: "DS4.ItemSpellCheckFlavor",
-            flavorData: { actor: speaker.alias ?? this.actor.name, spell: this.name },
-            speaker,
-        });
-    }
-
-    protected async getCombatValueKeyForAttackType(attackType: AttackType): Promise<"meleeAttack" | "rangedAttack"> {
-        if (attackType === "meleeRanged") {
-            const { melee, ranged } = { ...DS4.i18n.attackTypes };
-            const identifier = "attack-type-selection";
-            return Dialog.prompt({
-                title: getGame().i18n.localize("DS4.DialogAttackTypeSelection"),
-                content: await renderTemplate("systems/ds4/templates/dialogs/simple-select-form.hbs", {
-                    selects: [
-                        {
-                            label: getGame().i18n.localize("DS4.AttackType"),
-                            identifier,
-                            options: { melee, ranged },
-                        },
-                    ],
-                }),
-                label: getGame().i18n.localize("DS4.GenericOkButton"),
-                callback: (html) => {
-                    const selectedAttackType = html.find(`#${identifier}`).val();
-                    if (selectedAttackType !== "melee" && selectedAttackType !== "ranged") {
-                        throw new Error(
-                            getGame().i18n.format("DS4.ErrorUnexpectedAttackType", {
-                                actualType: selectedAttackType,
-                                expectedTypes: "'melee', 'ranged'",
-                            }),
-                        );
-                    }
-                    return `${selectedAttackType}Attack` as const;
-                },
-            });
-        } else {
-            return `${attackType}Attack` as const;
-        }
+        throw new Error(getGame().i18n.format("DS4.ErrorRollingForItemTypeNotPossible", { type: this.data.type }));
     }
 }

src/item/language/language-data-properties.ts

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4LanguageDataSourceData } from "./language-data-source";
+
+export interface DS4LanguageDataProperties {
+    type: "language";
+    data: DS4LanguageDataPropertiesData;
+}
+
+interface DS4LanguageDataPropertiesData extends DS4LanguageDataSourceData, DS4ItemDataPropertiesDataRollable {}

src/item/language/language-data-source.ts

@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataSourceDataBase } from "../item-data-source-base";
+
+export interface DS4LanguageDataSource {
+    type: "language";
+    data: DS4LanguageDataSourceData;
+}
+
+export type DS4LanguageDataSourceData = DS4ItemDataSourceDataBase;

src/item/language/language.ts

@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4Item } from "../item";
+
+export class DS4Language extends DS4Item {}
+
+export interface DS4Language {
+    data: foundry.data.ItemData & { type: "language"; _source: { type: "language" } };
+}

src/item/loot/loot-data-properties.ts

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4LootDataSourceData } from "./loot-data-source";
+
+export interface DS4LootDataProperties {
+    type: "loot";
+    data: DS4LootDataPropertiesData;
+}
+
+interface DS4LootDataPropertiesData extends DS4LootDataSourceData, DS4ItemDataPropertiesDataRollable {}

src/item/loot/loot-data-source.ts

@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataSourceDataBase, DS4ItemDataSourceDataPhysical } from "../item-data-source-base";
+
+export interface DS4LootDataSource {
+    type: "loot";
+    data: DS4LootDataSourceData;
+}
+
+export interface DS4LootDataSourceData extends DS4ItemDataSourceDataBase, DS4ItemDataSourceDataPhysical {}

src/item/loot/loot.ts

@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4Item } from "../item";
+
+export class DS4Loot extends DS4Item {}
+
+export interface DS4Loot {
+    data: foundry.data.ItemData & { type: "loot"; _source: { type: "loot" } };
+}

src/item/proxy.ts

@@ -0,0 +1,50 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { getGame } from "../helpers";
+import { DS4Alphabet } from "./alphabet/alphabet";
+import { DS4Armor } from "./armor/armor";
+import { DS4Equipment } from "./equipment/equipment";
+import { DS4Item } from "./item";
+import { DS4Language } from "./language/language";
+import { DS4Loot } from "./loot/loot";
+import { DS4RacialAbility } from "./racial-ability/racial-ability";
+import { DS4Shield } from "./shield/shield";
+import { DS4SpecialCreatureAbility } from "./special-creature-ability/special-creature-ability";
+import { DS4Spell } from "./spell/spell";
+import { DS4Talent } from "./talent/talent";
+import { DS4Weapon } from "./weapon/weapon";
+
+const handler = {
+    construct(_: typeof DS4Item, args: ConstructorParameters<typeof DS4Item>) {
+        switch (args[0]?.type) {
+            case "alphabet":
+                return new DS4Alphabet(...args);
+            case "armor":
+                return new DS4Armor(...args);
+            case "equipment":
+                return new DS4Equipment(...args);
+            case "language":
+                return new DS4Language(...args);
+            case "loot":
+                return new DS4Loot(...args);
+            case "racialAbility":
+                return new DS4RacialAbility(...args);
+            case "shield":
+                return new DS4Shield(...args);
+            case "specialCreatureAbility":
+                return new DS4SpecialCreatureAbility(...args);
+            case "spell":
+                return new DS4Spell(...args);
+            case "talent":
+                return new DS4Talent(...args);
+            case "weapon":
+                return new DS4Weapon(...args);
+            default:
+                throw new Error(getGame().i18n.format("DS4.ErrorInvalidItemType", { type: args[0]?.type }));
+        }
+    },
+};
+
+export const DS4ItemProxy: typeof DS4Item = new Proxy(DS4Item, handler);

src/item/racial-ability/racial-ability-data-properties.ts

@@ -0,0 +1,15 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4RacialAbilityDataSourceData } from "./racial-ability-data-source";
+
+export interface DS4RacialAbilityDataProperties {
+    type: "racialAbility";
+    data: DS4RacialAbilityDataPropertiesData;
+}
+
+interface DS4RacialAbilityDataPropertiesData
+    extends DS4RacialAbilityDataSourceData,
+        DS4ItemDataPropertiesDataRollable {}

src/item/racial-ability/racial-ability-data-source.ts

@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataSourceDataBase } from "../item-data-source-base";
+
+export interface DS4RacialAbilityDataSource {
+    type: "racialAbility";
+    data: DS4RacialAbilityDataSourceData;
+}
+
+export type DS4RacialAbilityDataSourceData = DS4ItemDataSourceDataBase;

src/item/racial-ability/racial-ability.ts

@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4Item } from "../item";
+
+export class DS4RacialAbility extends DS4Item {}
+
+export interface DS4RacialAbility {
+    data: foundry.data.ItemData & { type: "racialAbility"; _source: { type: "racialAbility" } };
+}

src/item/shield/shield-data-properties.ts

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4ShieldDataSourceData } from "./shield-data-source";
+
+export interface DS4ShieldDataProperties {
+    type: "shield";
+    data: DS4ShieldDataPropertiesData;
+}
+
+interface DS4ShieldDataPropertiesData extends DS4ShieldDataSourceData, DS4ItemDataPropertiesDataRollable {}

src/item/shield/shield-data-source.ts

@@ -0,0 +1,21 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import {
+    DS4ItemDataSourceDataBase,
+    DS4ItemDataSourceDataEquipable,
+    DS4ItemDataSourceDataPhysical,
+    DS4ItemDataSourceDataProtective,
+} from "../item-data-source-base";
+
+export interface DS4ShieldDataSource {
+    type: "shield";
+    data: DS4ShieldDataSourceData;
+}
+
+export interface DS4ShieldDataSourceData
+    extends DS4ItemDataSourceDataBase,
+        DS4ItemDataSourceDataPhysical,
+        DS4ItemDataSourceDataEquipable,
+        DS4ItemDataSourceDataProtective {}

src/item/shield/shield.ts

@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4Item } from "../item";
+
+export class DS4Shield extends DS4Item {}
+
+export interface DS4Shield {
+    data: foundry.data.ItemData & { type: "shield"; _source: { type: "shield" } };
+}

src/item/special-creature-ability/special-creature-ability-data-properties.ts

@@ -0,0 +1,15 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4SpecialCreatureAbilityDataSourceData } from "./special-creature-ability-data-source";
+
+export interface DS4SpecialCreatureAbilityDataProperties {
+    type: "specialCreatureAbility";
+    data: DS4SpecialCreatureAbilityDataPropertiesData;
+}
+
+interface DS4SpecialCreatureAbilityDataPropertiesData
+    extends DS4SpecialCreatureAbilityDataSourceData,
+        DS4ItemDataPropertiesDataRollable {}

src/item/special-creature-ability/special-creature-ability-data-source.ts

@@ -0,0 +1,14 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataSourceDataBase } from "../item-data-source-base";
+
+export interface DS4SpecialCreatureAbilityDataSource {
+    type: "specialCreatureAbility";
+    data: DS4SpecialCreatureAbilityDataSourceData;
+}
+
+export interface DS4SpecialCreatureAbilityDataSourceData extends DS4ItemDataSourceDataBase {
+    experiencePoints: number;
+}

src/item/special-creature-ability/special-creature-ability.ts

@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4Item } from "../item";
+
+export class DS4SpecialCreatureAbility extends DS4Item {}
+
+export interface DS4SpecialCreatureAbility {
+    data: foundry.data.ItemData & { type: "specialCreatureAbility"; _source: { type: "specialCreatureAbility" } };
+}

src/item/spell/calculate-spell-price.ts

@@ -2,7 +2,7 @@
 //
 // SPDX-License-Identifier: MIT
 
-import { CooldownDuration, DS4SpellDataSourceData } from "../item-data-source";
+import { CooldownDuration, DS4SpellDataSourceData } from "./spell-data-source";
 
 export function calculateSpellPrice(data: DS4SpellDataSourceData): number | null {
     const spellPriceFactor = calculateSpellPriceFactor(data.cooldownDuration);

src/item/spell/spell-data-properties.ts

@@ -0,0 +1,15 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4SpellDataSourceData } from "./spell-data-source";
+
+export interface DS4SpellDataProperties {
+    type: "spell";
+    data: DS4SpellDataPropertiesData;
+}
+
+interface DS4SpellDataPropertiesData extends DS4SpellDataSourceData, DS4ItemDataPropertiesDataRollable {
+    price: number | null;
+}

src/item/spell/spell-data-source.ts

@@ -0,0 +1,35 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4 } from "../../config";
+import { DS4ItemDataSourceDataBase, DS4ItemDataSourceDataEquipable } from "../item-data-source-base";
+
+export interface DS4SpellDataSource {
+    type: "spell";
+    data: DS4SpellDataSourceData;
+}
+
+export interface DS4SpellDataSourceData extends DS4ItemDataSourceDataBase, DS4ItemDataSourceDataEquipable {
+    spellType: keyof typeof DS4.i18n.spellTypes;
+    bonus: string;
+    spellCategory: keyof typeof DS4.i18n.spellCategories;
+    maxDistance: UnitData<DistanceUnit>;
+    effectRadius: UnitData<DistanceUnit>;
+    duration: UnitData<TemporalUnit>;
+    cooldownDuration: CooldownDuration;
+    minimumLevels: {
+        healer: number | null;
+        wizard: number | null;
+        sorcerer: number | null;
+    };
+}
+
+export interface UnitData<UnitType> {
+    value: string;
+    unit: UnitType;
+}
+
+type DistanceUnit = keyof typeof DS4.i18n.distanceUnits;
+type TemporalUnit = keyof typeof DS4.i18n.temporalUnits;
+export type CooldownDuration = keyof typeof DS4.i18n.cooldownDurations;

src/item/spell/spell.ts

@@ -0,0 +1,63 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { getGame } from "../../helpers";
+import { createCheckRoll } from "../../rolls/check-factory";
+import notifications from "../../ui/notifications";
+import { DS4Item } from "../item";
+import { calculateSpellPrice } from "./calculate-spell-price";
+
+export class DS4Spell extends DS4Item {
+    /** @override */
+    prepareDerivedData(): void {
+        this.data.data.rollable = this.data.data.equipped;
+        this.data.data.price = calculateSpellPrice(this.data.data);
+    }
+
+    /** @override */
+    async roll(options: { speaker?: { token?: TokenDocument; alias?: string } } = {}): Promise<void> {
+        const game = getGame();
+
+        if (!this.data.data.equipped) {
+            return notifications.warn(
+                game.i18n.format("DS4.WarningItemMustBeEquippedToBeRolled", {
+                    name: this.name,
+                    id: this.id,
+                    type: this.data.type,
+                }),
+            );
+        }
+
+        if (!this.actor) {
+            throw new Error(game.i18n.format("DS4.ErrorCannotRollUnownedItem", { name: this.name, id: this.id }));
+        }
+
+        const ownerDataData = this.actor.data.data;
+        const spellModifier = Number.isNumeric(this.data.data.bonus) ? parseInt(this.data.data.bonus) : undefined;
+        if (spellModifier === undefined) {
+            notifications.info(
+                game.i18n.format("DS4.InfoManuallyEnterSpellModifier", {
+                    name: this.name,
+                    spellModifier: this.data.data.bonus,
+                }),
+            );
+        }
+        const spellType = this.data.data.spellType;
+        const checkTargetNumber = ownerDataData.combatValues[spellType].total + (spellModifier ?? 0);
+
+        const speaker = ChatMessage.getSpeaker({ actor: this.actor, ...options.speaker });
+        await createCheckRoll(checkTargetNumber, {
+            rollMode: game.settings.get("core", "rollMode"),
+            maximumCoupResult: ownerDataData.rolling.maximumCoupResult,
+            minimumFumbleResult: ownerDataData.rolling.minimumFumbleResult,
+            flavor: "DS4.ItemSpellCheckFlavor",
+            flavorData: { actor: speaker.alias ?? this.actor.name, spell: this.name },
+            speaker,
+        });
+    }
+}
+
+export interface DS4Spell {
+    data: foundry.data.ItemData & { type: "spell"; _source: { type: "spell" } };
+}

src/item/talent/talent-data-properties.ts

@@ -0,0 +1,16 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { ModifiableDataBaseTotalMax } from "../../common/common-data";
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4TalentDataSourceData } from "./talent-data-source";
+
+export interface DS4TalentDataProperties {
+    type: "talent";
+    data: DS4TalentDataPropertiesData;
+}
+
+interface DS4TalentDataPropertiesData extends DS4TalentDataSourceData, DS4ItemDataPropertiesDataRollable {
+    rank: ModifiableDataBaseTotalMax<number>;
+}

src/item/talent/talent-data-source.ts

@@ -0,0 +1,15 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { ModifiableDataBaseMax } from "../../common/common-data";
+import { DS4ItemDataSourceDataBase } from "../item-data-source-base";
+
+export interface DS4TalentDataSource {
+    type: "talent";
+    data: DS4TalentDataSourceData;
+}
+
+export interface DS4TalentDataSourceData extends DS4ItemDataSourceDataBase {
+    rank: ModifiableDataBaseMax<number>;
+}

src/item/talent/talent.ts

@@ -0,0 +1,23 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4Item } from "../item";
+
+export class DS4Talent extends DS4Item {
+    /** @override */
+    prepareDerivedData(): void {
+        super.prepareDerivedData();
+        const data = this.data.data;
+        data.rank.total = data.rank.base + data.rank.mod;
+    }
+
+    /** @override */
+    get activeEffectFactor(): number | undefined {
+        return this.data.data.rank.total;
+    }
+}
+
+export interface DS4Talent {
+    data: foundry.data.ItemData & { type: "talent"; _source: { type: "talent" } };
+}

src/item/weapon/weapon-data-properties.ts

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4ItemDataPropertiesDataRollable } from "../item-data-properties-base";
+import { DS4WeaponDataSourceData } from "./weapon-data-source";
+
+interface DS4WeaponDataPropertiesData extends DS4WeaponDataSourceData, DS4ItemDataPropertiesDataRollable {}
+
+export interface DS4WeaponDataProperties {
+    type: "weapon";
+    data: DS4WeaponDataPropertiesData;
+}

src/item/weapon/weapon-data-source.ts

@@ -0,0 +1,26 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4 } from "../../config";
+import {
+    DS4ItemDataSourceDataBase,
+    DS4ItemDataSourceDataEquipable,
+    DS4ItemDataSourceDataPhysical,
+} from "../item-data-source-base";
+
+export interface DS4WeaponDataSource {
+    type: "weapon";
+    data: DS4WeaponDataSourceData;
+}
+
+export interface DS4WeaponDataSourceData
+    extends DS4ItemDataSourceDataBase,
+        DS4ItemDataSourceDataPhysical,
+        DS4ItemDataSourceDataEquipable {
+    attackType: AttackType;
+    weaponBonus: number;
+    opponentDefense: number;
+}
+
+export type AttackType = keyof typeof DS4.i18n.attackTypes;

src/item/weapon/weapon.ts

@@ -0,0 +1,88 @@
+// SPDX-FileCopyrightText: 2022 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import { DS4 } from "../../config";
+import { getGame } from "../../helpers";
+import { createCheckRoll } from "../../rolls/check-factory";
+import notifications from "../../ui/notifications";
+import { DS4Item } from "../item";
+import { AttackType } from "./weapon-data-source";
+
+export class DS4Weapon extends DS4Item {
+    /** @override */
+    prepareDerivedData(): void {
+        this.data.data.rollable = this.data.data.equipped;
+    }
+
+    /** @override */
+    async roll(options: { speaker?: { token?: TokenDocument; alias?: string } } = {}): Promise<void> {
+        const game = getGame();
+        if (!this.data.data.equipped) {
+            return notifications.warn(
+                game.i18n.format("DS4.WarningItemMustBeEquippedToBeRolled", {
+                    name: this.name,
+                    id: this.id,
+                    type: this.data.type,
+                }),
+            );
+        }
+
+        if (!this.actor) {
+            throw new Error(game.i18n.format("DS4.ErrorCannotRollUnownedItem", { name: this.name, id: this.id }));
+        }
+
+        const ownerDataData = this.actor.data.data;
+        const weaponBonus = this.data.data.weaponBonus;
+        const combatValue = await this.getCombatValueKeyForAttackType(this.data.data.attackType);
+        const checkTargetNumber = ownerDataData.combatValues[combatValue].total + weaponBonus;
+
+        const speaker = ChatMessage.getSpeaker({ actor: this.actor, ...options.speaker });
+        await createCheckRoll(checkTargetNumber, {
+            rollMode: getGame().settings.get("core", "rollMode"),
+            maximumCoupResult: ownerDataData.rolling.maximumCoupResult,
+            minimumFumbleResult: ownerDataData.rolling.minimumFumbleResult,
+            flavor: "DS4.ItemWeaponCheckFlavor",
+            flavorData: { actor: speaker.alias ?? this.actor.name, weapon: this.name },
+            speaker,
+        });
+    }
+
+    private async getCombatValueKeyForAttackType(attackType: AttackType): Promise<"meleeAttack" | "rangedAttack"> {
+        if (attackType === "meleeRanged") {
+            const { melee, ranged } = { ...DS4.i18n.attackTypes };
+            const identifier = "attack-type-selection";
+            return Dialog.prompt({
+                title: getGame().i18n.localize("DS4.DialogAttackTypeSelection"),
+                content: await renderTemplate("systems/ds4/templates/dialogs/simple-select-form.hbs", {
+                    selects: [
+                        {
+                            label: getGame().i18n.localize("DS4.AttackType"),
+                            identifier,
+                            options: { melee, ranged },
+                        },
+                    ],
+                }),
+                label: getGame().i18n.localize("DS4.GenericOkButton"),
+                callback: (html) => {
+                    const selectedAttackType = html.find(`#${identifier}`).val();
+                    if (selectedAttackType !== "melee" && selectedAttackType !== "ranged") {
+                        throw new Error(
+                            getGame().i18n.format("DS4.ErrorUnexpectedAttackType", {
+                                actualType: selectedAttackType,
+                                expectedTypes: "'melee', 'ranged'",
+                            }),
+                        );
+                    }
+                    return `${selectedAttackType}Attack` as const;
+                },
+            });
+        } else {
+            return `${attackType}Attack` as const;
+        }
+    }
+}
+
+export interface DS4Weapon {
+    data: foundry.data.ItemData & { type: "weapon"; _source: { type: "weapon" } };
+}

src/migrations/005.ts

@@ -2,7 +2,6 @@
 //
 // SPDX-License-Identifier: MIT
 
-import { CooldownDuration } from "../item/item-data-source";
 import {
     getActorUpdateDataGetter,
     getCompendiumMigrator,
@@ -45,10 +44,10 @@ function getItemUpdateData(itemData: Partial<foundry.data.ItemData["_source"]>)
     return updateData;
 }
 
-function migrateCooldownDuration(cooldownDurationValue?: string, cooldownDurationUnit?: string) {
+function migrateCooldownDuration(cooldownDurationValue = "", cooldownDurationUnit = "") {
     if (Number.isNumeric(cooldownDurationValue)) {
-        const value = Number.fromString(cooldownDurationValue!);
-        const rounds = getRounds(cooldownDurationUnit ?? "", value);
+        const value = Number.fromString(cooldownDurationValue);
+        const rounds = getRounds(cooldownDurationUnit, value);
 
         if (rounds * secondsPerRound > secondsPerDay) {
             return "d20d";