foundry-vtt-system-midgard5/source/module/items/M5Item.ts

import { M5Character } from "../actors/M5Character"
import M5ModAggregate from "../actors/M5ModAggregate"
import { enumKeys, M5Attributes, M5ModOperation, M5ModPair, M5ModType, M5RollData, M5RollResult, M5Stats } from "../M5Base"
import { M5Roll } from "../rolls/M5Roll"

export class M5Item extends Item {
	static readonly SKILL = "skill"

	prepareDerivedData() {
		const itemId: string = (this as any).id
		const itemType: string = (this as any).type
		const actor = (this.actor as any)
		const character = actor as M5Character
		const itemData = (this as any).system
		const calc = itemData.calc

		if (itemType === "skill") {
			calc.fw = itemData.fw
			calc.bonus = 0

			let pairs: Array<M5ModPair> = [{
				source: (this as any).name,
				mod: {
					type: M5ModType.SKILL,
					id: itemId,
					operation: M5ModOperation.SET,
					value: itemData.fw
				}
			}]

			if (character) {
				const actorCalc = character.derivedData({ skills: true, weapons: true, defensiveWeapons: true, armor: true, items: true, spells: true })
				if (actorCalc?.skillMods && Object.keys(actorCalc.skillMods).indexOf(itemId) !== -1) {
					pairs = pairs.concat(actorCalc.skillMods[itemId])
				
					if (itemData?.attribute && itemData.attribute !== "") {
						pairs.push({
							source: (this as any).name,
							mod: {
								type: M5ModType.SKILL,
								id: itemId,
								operation: M5ModOperation.ADD,
								value: actorCalc.attributes[itemData.attribute].bonus
							}
						})
					}
				}
			}

			const res = M5ModAggregate.processPairs(pairs)
			res.mods.forEach(mod => {
				if ([M5ModOperation.SET, M5ModOperation.FIXED].includes(mod.operation))
					calc.fw = mod.value
				else
					calc.bonus += mod.value
			})

			calc.ew = calc.fw + calc.bonus
			calc.sources = res.mods
		} else if (itemType === "weapon") {
			calc.fw = 0
			calc.bonus = 0
			calc.special = itemData.special ? 2 : 0
			calc.ew = calc.special + itemData.stats.attackBonus
			calc.combatSkills = null

			if (actor) {
				const actorCalc = character.derivedData({ weapons: true, defensiveWeapons: true, armor: true, items: true, spells: true })
				if (actorCalc) {
					calc.ew += actorCalc.stats.attackBonus.value
					calc.combatSkills = actorCalc.skills.combat
				}

				const skill = character.getItem(itemData.skillId)
				//console.log("M5Item.prepareDerivedData:weapon", itemData, skill?.system)
				if (skill) {
					skill.prepareDerivedData()
					const skillData = skill.system
					calc.ew += skillData.calc.ew
					calc.bonus += skillData.calc.bonus
					calc.fw += skillData.fw
				}
			}
		} else if (itemType === "defensiveWeapon") {
			calc.fw = 0
			calc.bonus = 0
			calc.special = itemData.special ? 2 : 0
			calc.ew = calc.special + itemData.stats.defenseBonus
			calc.combatSkills = null

			if (actor) {
				const actorCalc = character.derivedData({ weapons: true, defensiveWeapons: true, armor: true, items: true, spells: true })
				if (actorCalc) {
					calc.ew += actorCalc.stats.defense.value + actorCalc.stats.defenseBonus.value
					calc.combatSkills = actorCalc.skills.combat
				}

				const skill = character.getItem(itemData.skillId)
				//console.log("M5Item.prepareDerivedData:weapon", itemData, skill?.system)
				if (skill) {
					skill.prepareDerivedData()
					const skillData = skill.system
					calc.ew += skillData.calc.ew
					calc.bonus += skillData.calc.bonus
					calc.fw += skillData.fw
				}
			}
		} else if (itemType === "spell") {
			calc.ew = itemData.bonus
			if (actor) {
				const actorCalc = character.derivedData({ weapons: true, defensiveWeapons: true, armor: true, items: true, spells: true })
				if (actorCalc) {
					calc.ew += actorCalc.stats.spellCasting.value
				}
			}
		} else if (itemType === "item") {
			calc.mods = {}
			Object.keys(itemData?.mods).forEach(key => {
				const mod = itemData.mods[key]
				const modCalc = {}
				switch (mod.type) {
					case M5ModType.ATTRIBUTE: {
						for (const key of enumKeys(M5Attributes)) {
							const val: string = M5Attributes[key]
							modCalc[val] = (game as Game).i18n.localize(`midgard5.actor-${val}-long`)
						}
						break
					}
					case M5ModType.STAT: {
						for (const key of enumKeys(M5Stats)) {
							const val: string = M5Stats[key]
							modCalc[val] = (game as Game).i18n.localize(`midgard5.mod-stat-${val}`)
						}
						break
					}
					case M5ModType.SKILL: {
						if (character) {
							const actorCalc = character.derivedData({ weapons: true, defensiveWeapons: true, armor: true, items: true, spells: true })
							if (actorCalc) {
								let category = (game as Game).i18n.localize("midgard5.skill")
								Object.keys(actorCalc.skills.general).forEach(skillId => {
									const skill = character.getItem(skillId)
									if (skill)
										modCalc[skillId] = `${category}: ${skill.name}`
								})
	
								category = (game as Game).i18n.localize("midgard5.language")
								Object.keys(actorCalc.skills.language).forEach(skillId => {
									const skill = character.getItem(skillId)
									if (skill)
										modCalc[skillId] = `${category}: ${skill.name}`
								})
	
								category = (game as Game).i18n.localize("midgard5.weapon-skill")
								Object.keys(actorCalc.skills.combat).forEach(skillId => {
									const skill = character.getItem(skillId)
									if (skill)
										modCalc[skillId] = `${category}: ${skill.name}`
								})
	
								category = (game as Game).i18n.localize("midgard5.innate-ability")
								Object.keys(actorCalc.skills.innate).forEach(skillId => {
									const skill = character.getItem(skillId)
									if (skill)
										modCalc[skillId] = `${category}: ${skill.name}`
								})
							}
						}
						break
					}
				}

				calc.mods[key] = modCalc
			})
		}
	}

	getRollData() {
		const actor = this.actor as any
		const item = this as any

		let ret: M5RollData = actor?.getRollData() ?? {
			c: null,
			i: null,
			iType: null,
			rolls: {},
			res: {}
		}

		ret.i = item.system
		ret.iType = item.type
		return ret
	}

	async roll() {
		const item = (this as any)

		// Initialize chat data.
		const speaker = ChatMessage.getSpeaker({ actor: this.actor })
		const rollMode = (game as Game).settings.get('core', 'rollMode')
		const label = `[${item.type}] ${item.name}`

		// If there's no roll data, send a chat message.
		const formulaNames = item.system.rolls?.formulas ? Object.keys(item.system.rolls.formulas) : []
		if (formulaNames.length > 0) {
			const rollData = this.getRollData()
			formulaNames.forEach(formulaName => {
				const formula = item.system.rolls.formulas[formulaName]
				if (formula) {
					rollData.rolls[formulaName] = {
						formula: formula.formula,
						label: formula.label,
						enabled: formula.enabled,
						result: "",
						total: 0,
						totalStr: "",
						dice: {}
					} as M5RollResult
				}
			})
			
			const roll = new M5Roll(rollData, this.actor, item.name)
			return roll.toMessage()
		} else {
			ChatMessage.create({
				speaker: speaker,
				rollMode: rollMode,
				flavor: label,
				content: item.system.description ?? ''
			})
			return null
		}
	}

	getItem(itemId: string): any {
		return (this as any).getEmbeddedDocument("Item", itemId)
	}

}