81 lines
1.7 KiB
TypeScript
81 lines
1.7 KiB
TypeScript
export type SessionStateValue =
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| 'PENDING'
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| 'IN_PROGRESS'
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| 'PAUSED'
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| 'COMPLETED'
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| 'FAILED'
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| 'STOPPED_AT_STEP_18';
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const VALID_STATES: SessionStateValue[] = [
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'PENDING',
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'IN_PROGRESS',
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'PAUSED',
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'COMPLETED',
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'FAILED',
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'STOPPED_AT_STEP_18',
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];
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const VALID_TRANSITIONS: Record<SessionStateValue, SessionStateValue[]> = {
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PENDING: ['IN_PROGRESS', 'FAILED'],
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IN_PROGRESS: ['PAUSED', 'COMPLETED', 'FAILED', 'STOPPED_AT_STEP_18'],
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PAUSED: ['IN_PROGRESS', 'FAILED'],
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COMPLETED: [],
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FAILED: [],
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STOPPED_AT_STEP_18: [],
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};
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export class SessionState {
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private readonly _value: SessionStateValue;
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private constructor(value: SessionStateValue) {
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this._value = value;
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}
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static create(value: SessionStateValue): SessionState {
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if (!VALID_STATES.includes(value)) {
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throw new Error('Invalid session state');
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}
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return new SessionState(value);
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}
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get value(): SessionStateValue {
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return this._value;
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}
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equals(other: SessionState): boolean {
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return this._value === other._value;
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}
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isPending(): boolean {
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return this._value === 'PENDING';
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}
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isInProgress(): boolean {
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return this._value === 'IN_PROGRESS';
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}
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isCompleted(): boolean {
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return this._value === 'COMPLETED';
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}
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isFailed(): boolean {
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return this._value === 'FAILED';
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}
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isStoppedAtStep18(): boolean {
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return this._value === 'STOPPED_AT_STEP_18';
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}
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canTransitionTo(targetState: SessionState): boolean {
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const allowedTransitions = VALID_TRANSITIONS[this._value];
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return allowedTransitions.includes(targetState._value);
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}
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isTerminal(): boolean {
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return (
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this._value === 'COMPLETED' ||
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this._value === 'FAILED' ||
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this._value === 'STOPPED_AT_STEP_18'
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);
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}
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} |