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import { type SetRequired } from 'type-fest';
import { dateIsInAssignmentRange, doPeriodsOverlap, toTimestamp, type UnixTimestampInSeconds } from '@amalia/ext/dates';
import { TeamRole, type TeamAssignment } from '@amalia/tenants/assignments/teams/types';
import { type HierarchyContextDehydrated, type HierarchyContextInterface } from '@amalia/tenants/teams/hierarchy/types';
import { type TeamContract } from '@amalia/tenants/teams/types';
import { UserRole, type UserContract } from '@amalia/tenants/users/types';
export class HierarchyContext implements HierarchyContextInterface {
private subTeamsOfEachTeam: HierarchyContextDehydrated['subTeamsOfEachTeam'];
private readonly currentUserAssignments: TeamAssignment[];
public constructor(
private readonly currentUser: UserContract,
private readonly teamAssignments: SetRequired<TeamAssignment, 'user'>[],
teamHierarchy: TeamContract[],
) {
// Check team assignments contains users.
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition -- Falsy when relation isn't loaded.
if (teamAssignments.some((ta) => !ta.user)) {
throw new Error('Hierarchy Context should be instantiated with its users.');
}
this.currentUserAssignments = teamAssignments.filter((t) => t.user.id === currentUser.id);
this.subTeamsOfEachTeam = [UserRole.MANAGER, UserRole.READ_ONLY_MANAGER].includes(currentUser.role)
? // If the current user is a manager, populate the subteams.
// Build the list of teamIds in the hierarchy where the current user can be manager.
// It avoids dumping the full hierarchy in this class.
pick(
HierarchyContext.buildSubTeamsHierarchyTree(teamHierarchy),
// Filter the list of assignments to retrieve those where the current user is manager.
this.currentUserAssignments
.filter((managerAssignment) => managerAssignment.teamRole === TeamRole.TEAM_MANAGER)
.map((ta) => ta.teamId),
)
: {};
}
/**
* Get team assignments of the current user at a given date.
* @param date
*/
public getUserTeamAssignments(date: Date | UnixTimestampInSeconds): TeamAssignment[] {
const observationDateTimestamp = toTimestamp(date);
return this.currentUserAssignments.filter((teamAssignment) =>
dateIsInAssignmentRange(observationDateTimestamp, teamAssignment),
);
}
/**
* Returns true if the user is a member of the team at a given date.
*
* It doesn't support hierarchy, it's only for direct team assignment.
*
* @param teamId
* @param date
*/
public isTeamMember(teamId: TeamContract['id'], date: Date | UnixTimestampInSeconds): boolean {
return this.getUserTeamAssignments(date)
.map((ta) => ta.teamId)
.includes(teamId);
}
/**
* Returns true if the user is managing a specific team at a given date.
*
* It supports hierarchy.
*
* @param teamId
* @param date
*/
public isTeamManager(teamId: TeamContract['id'], date: Date | UnixTimestampInSeconds): boolean {
return this.getTeamIdsWhereUserIsManager(date).includes(teamId);
}
private getOngoingManagerAssignmentsOfCurrentUser(observationDateTimestamp: number): TeamAssignment[] {
return this.currentUserAssignments.filter(
(managerAssignment) =>
managerAssignment.teamRole === TeamRole.TEAM_MANAGER &&
dateIsInAssignmentRange(observationDateTimestamp, managerAssignment),
);
}
/**
* Return the list of users that the current person managed at least one day.
*
* It can be interesting for instance if you want to see all statements that can be
* accessed by a manager. We cannot do an SQL query with the dates of each assignment,
* so we're going to gather all statements for all the users managed by that person at least
* one day, then we'll filter out the statements by calling the "isManager" method for
* the start date of each of them.
*/
public getAllPeopleCurrentUserManagedAtLeastOneDay(): UserContract[] {
const currentUserManagerAssignments = this.currentUserAssignments.filter(
(managerAssignment) => managerAssignment.teamRole === TeamRole.TEAM_MANAGER,
);
if (!currentUserManagerAssignments.length) {
return [];
}
// For each manager assignment I had.
return uniqBy(
currentUserManagerAssignments.flatMap((currentUserManagerAssignment) => {
// Get the list of the teams managed during this period. It's my team and its subteams.
const teamIdsManagedDuringThisAssignment = new Set([
currentUserManagerAssignment.teamId,
...(this.subTeamsOfEachTeam[currentUserManagerAssignment.teamId] ?? []),
]);
return this.teamAssignments
.filter(
(employeeAssignment) =>
// Remove myself
employeeAssignment.user.id !== currentUserManagerAssignment.user!.id &&
// Return all the people that have been in one of those teams.
teamIdsManagedDuringThisAssignment.has(employeeAssignment.teamId) &&
// And their assignment dates overlaps with when I was manager.
doPeriodsOverlap(
{
startDate: currentUserManagerAssignment.effectiveAsOf,
endDate: currentUserManagerAssignment.effectiveUntil,
},
{
startDate: employeeAssignment.effectiveAsOf,
endDate: employeeAssignment.effectiveUntil,
},
),
)
.map((employeeAssignment) => employeeAssignment.user);
}),
'id',
);
}
/**
* Get the list of team ids that are managed by the current user.
* @param date
*/
public getTeamIdsWhereUserIsManager(date: Date | UnixTimestampInSeconds): TeamContract['id'][] {
const observationDateTimestamp = toTimestamp(date);
const ongoingManagerAssignments = this.getOngoingManagerAssignmentsOfCurrentUser(observationDateTimestamp);
if (!ongoingManagerAssignments.length) {
return [];
}
// Compute the list of teams where the current user is manager based on the hierarchy.
return ongoingManagerAssignments.flatMap((ma) => [ma.teamId, ...(this.subTeamsOfEachTeam[ma.teamId] ?? [])]);
}
/**
* Get the list of all team assignments for which the current user is manager at a given date.
* @param date
*/
public getSubordinates(date: Date | UnixTimestampInSeconds) {
const observationDateTimestamp = toTimestamp(date);
const listOfTeamsWhereCurrentUserIsCurrentlyManager = this.getTeamIdsWhereUserIsManager(observationDateTimestamp);
const listOfTeamsWhereCurrentUserIsAssignedAsManager = new Set(
this.getOngoingManagerAssignmentsOfCurrentUser(observationDateTimestamp).map((ma) => ma.teamId),
);
// Knowing all the teams where the current user has authority on the given date, we can filter assignments.
return this.teamAssignments.filter(
(employeeAssignment) =>
listOfTeamsWhereCurrentUserIsCurrentlyManager.includes(employeeAssignment.teamId) &&
dateIsInAssignmentRange(observationDateTimestamp, employeeAssignment) &&
// The user is me
(employeeAssignment.user.id === this.currentUser.id ||
// OR the user is not a manager.
employeeAssignment.teamRole !== TeamRole.TEAM_MANAGER ||
// OR the user is a manager of a team I manage (but not at the same level as me).
// Because business rules states that if we're two manager of the same team,
// we technically don't manage each others.
!listOfTeamsWhereCurrentUserIsAssignedAsManager.has(employeeAssignment.teamId)),
);
}
public getSubordinateIds(date: Date | UnixTimestampInSeconds) {
return this.getSubordinates(date).map((employeeAssignment) => employeeAssignment.user.id);
}
/**
* Return true if the current user is manager of a given employee at a given date.
*
* @param employeeId - UserId of the employee.
* @param date
*/
public isManagerOf(employeeId: string, date: Date | UnixTimestampInSeconds) {
return this.getSubordinates(date).some((employeeAssignment) => employeeAssignment.user.id === employeeId);
}
/**
* Builds a hashmap. Key is the teamId, value is an array containing the id of all
* teams that are a subteam of the teamId.
*
* @param teamHierarchy
* @private
*/
private static buildSubTeamsHierarchyTree(
teamHierarchy: TeamContract[],
): Record<TeamContract['id'], TeamContract['id'][]> {
return teamHierarchy.reduce(
(acc, curr) => {
const parsingOfMyChildren = curr.childrenTeams.length
? HierarchyContext.buildSubTeamsHierarchyTree(curr.childrenTeams)
: {};
return {
...acc,
...parsingOfMyChildren,
[curr.id]: Object.keys(parsingOfMyChildren),
};
},
{} as Record<TeamContract['id'], TeamContract['id'][]>,
);
}
/**
* Returning undefined to avoid having it unintentionally in a DTO.
*/
public toString() {
return undefined;
}
/**
* Transform the manager scope, to put it in a key value storage or to send
* it to the frontend.
*/
public dehydrate(): HierarchyContextDehydrated {
return {
teamAssignments: this.teamAssignments,
subTeamsOfEachTeam: this.subTeamsOfEachTeam,
};
}
/**
* Given an objectManagerScope, builds a class.
*
* @param currentUser
* @param objectManagerScope
*/
public static hydrate(currentUser: UserContract, objectManagerScope: HierarchyContextDehydrated) {
const hierarchyContext = new HierarchyContext(currentUser, objectManagerScope.teamAssignments, []);
hierarchyContext.subTeamsOfEachTeam = objectManagerScope.subTeamsOfEachTeam;
return hierarchyContext;
}
}
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