1// SPDX-FileCopyrightText: Amolith <amolith@secluded.site>
 2//
 3// SPDX-License-Identifier: AGPL-3.0-or-later
 4
 5package lunatask
 6
 7import (
 8	"errors"
 9	"fmt"
10	"strings"
11)
12
13// RelationshipStrength categorizes the closeness of a relationship.
14type RelationshipStrength string
15
16// Valid relationship strength values.
17const (
18	RelationshipFamily         RelationshipStrength = "family"
19	RelationshipIntimateFriend RelationshipStrength = "intimate-friends"
20	RelationshipCloseFriend    RelationshipStrength = "close-friends"
21	// RelationshipCasualFriend is the default if not specified.
22	RelationshipCasualFriend   RelationshipStrength = "casual-friends"
23	RelationshipAcquaintance   RelationshipStrength = "acquaintances"
24	RelationshipBusiness       RelationshipStrength = "business-contacts"
25	RelationshipAlmostStranger RelationshipStrength = "almost-strangers"
26)
27
28// Errors returned by RelationshipStrength operations.
29var (
30	// ErrInvalidRelationshipStrength is returned when parsing an unknown relationship strength string.
31	ErrInvalidRelationshipStrength = errors.New("invalid relationship strength")
32)
33
34// String returns the relationship strength value as a string.
35func (r RelationshipStrength) String() string {
36	return string(r)
37}
38
39// ParseRelationshipStrength parses a string to a RelationshipStrength value (case-insensitive).
40// Valid values: "family", "intimate-friends", "close-friends", "casual-friends",
41// "acquaintances", "business-contacts", "almost-strangers".
42func ParseRelationshipStrength(str string) (RelationshipStrength, error) {
43	switch strings.ToLower(str) {
44	case "family":
45		return RelationshipFamily, nil
46	case "intimate-friends":
47		return RelationshipIntimateFriend, nil
48	case "close-friends":
49		return RelationshipCloseFriend, nil
50	case "casual-friends":
51		return RelationshipCasualFriend, nil
52	case "acquaintances":
53		return RelationshipAcquaintance, nil
54	case "business-contacts":
55		return RelationshipBusiness, nil
56	case "almost-strangers":
57		return RelationshipAlmostStranger, nil
58	default:
59		return "", fmt.Errorf("%w: %q", ErrInvalidRelationshipStrength, str)
60	}
61}