https://ivaprime.com/static/js/userPreferences.js

1const UserPreferences = new class {
2    constructor() {
3        this.cookieName = 'user_prefs';
4        this.expiryDays = 365;
5
6        this.defaultSettings = {
7            "theme": "light",
8            "cookieConsentGiven": false,
9
10            "modifyPlasmidAfterOperation": true,
11            "onlyModifyPlasmid": false,
12            "symmetricPrimers": false,
13            "HRMinLength": 18,
14            "HRTm": 50,
15            "HRSubcloningTm": 55,
16            "TBRTm": 60,
17            "maxTmSi": 49.5,
18            "primerConc": 100,
19            "TmAlgorithm": "oligoCalc",
20            "saltConc": 0,
21            "saltCorr": "SchildkrautLifson",
22            "dmsoConc": 0,
23
24            "useGCClamp": false,
25
26            "baseWidth": 16,
27
28            "preferredOrganism": "Escherichia coli",
29
30            "overwriteSnapGeneColors": true,
31        };
32
33        const savedPreferences = this.loadPreferences();
34        //console.log(`UserPreferences -> savedPreferences=\n${JSON.stringify(savedPreferences, null, 2)}`);
35        this.preferences = { ...this.defaultSettings, ...savedPreferences };
36        //console.log(`UserPreferences -> merged=\n${JSON.stringify(this.preferences, null, 2)}`);
37        this.savePreferences();
38    };
39
40    /**
41     * Load preferences from cookie.
42     * 
43     * @returns {Object} - Dictionary of settings
44     */
45    loadPreferences() {
46        const cookies = document.cookie.split('; ');
47        let userPrefsCookie = null;
48        for (let cookie of cookies) {
49            let [key, value] = cookie.split('=');
50            if (key === this.cookieName) {
51                userPrefsCookie = decodeURIComponent(value);
52            };
53        };
54        return userPrefsCookie ? JSON.parse(userPrefsCookie) : {};
55    };
56
57    
58    /**
59     * Save current preferences to the cookie.
60     */
61    savePreferences() {
62        let expires = '';
63        if (this.expiryDays) {
64            const date = new Date();
65            date.setTime(date.getTime() + this.expiryDays * 24 * 60 * 60 * 1000);
66            expires = `; expires=${date.toUTCString()}`;
67        };
68
69        document.cookie = `${this.cookieName}=${JSON.stringify(this.preferences)}${expires}; path=/`;
70    };
71
72
73    /**
74     * Delete user preferences cookie
75     */
76    deleteCookie() {
77        document.cookie = `${this.cookieName}=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/;`;
78        location.reload();
79    };
80
81
82    /**
83     * Set user preference.
84     * 
85     * @param {String} key - Name of entry
86     * @param {any} value - Value of entry
87     */
88    set(key, value) {
89        this.preferences[key] = value;
90        this.savePreferences();
91    };
92
93
94    setBulk(prefs) {
95        Object.assign(this.preferences, prefs); 
96        this.savePreferences();
97    };
98
99
100    /**
101     * Get specific user preference value
102     * 
103     * @param {String} key - Name of entry
104     * @returns {any} - Value of entry
105     */
106    get(key) {
107        console.assert(key in this.preferences, `User preference "${key}" does not exist.`);
108        return this.preferences[key];
109    };
110};