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ledger.js
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ledger.js
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const {
ASSET,
LIABILITY,
EQUITY,
REVENUE,
EXPENSE
} = require('./major-account-type')
/**
* The ledger model.
*
* This represents the general ledger.
*
* 総勘定元帳
*/
class Ledger {
/**
* @constructor
* @param {Array<Subledger>} subledgers
*/
constructor(subledgers) {
this.subledgers = {}
this.subledgers[ASSET.name] = []
this.subledgers[LIABILITY.name] = []
this.subledgers[EQUITY.name] = []
this.subledgers[REVENUE.name] = []
this.subledgers[EXPENSE.name] = []
this.subledgerList = []
this.subledgerMap = {}
subledgers.forEach(subledger => this.add(subledger))
}
/**
* Adds the subledger.
*
* @param {Subledger} subledger The subledger
*/
add(subledger) {
switch (subledger.majorType) {
case ASSET:
this.subledgers[ASSET.name].push(subledger)
break
case LIABILITY:
this.subledgers[LIABILITY.name].push(subledger)
break
case EQUITY:
this.subledgers[EQUITY.name].push(subledger)
break
case REVENUE:
this.subledgers[REVENUE.name].push(subledger)
break
case EXPENSE:
this.subledgers[EXPENSE.name].push(subledger)
break
}
this.subledgerMap[subledger.type.name] = subledger
this.subledgerList.push(subledger)
}
/**
* Gets the subledgers by the major account type.
*
* @param {MajorAccountType} majorType The major account type
* @return {Array<Subledger>}
*/
getSubledgersByMajorType(majorType) {
return this.subledgers[majorType.name]
}
/**
* @param {AccountType} type The account type
* @return {Subledger}
* @throws {Error} when the subledger of the given type is not found.
*/
getSubledgerByAccountType(type) {
const subledger = this.subledgerMap[type.name]
if (!subledger) {
throw new Error(`No such account: ${type.name}`)
}
return subledger
}
/**
* @param {AccountType} type
* @return {boolean}
*/
hasSubledgerOfAccountType(type) {
return this.subledgerMap[type.name] != null
}
}
module.exports = Ledger