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h=e.sent,e.abrupt("return",{cipherText:h,salt:m(n),publicServerKey:m(o.publicKey)});case 28:case"end":return e.stop()}}),e,this)}))),function(e,t){return u.apply(this,arguments)})},{key:"_generateEncryptionKeys",value:(s=o(c().mark((function e(t,r,n){var i,o,a,s,u,l,p;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,Promise.all([this._generatePRK(t,n),this._generateCEKInfo(t,n),this._generateNonceInfo(t,n)]);case 2:return i=e.sent,o=i[0],a=i[1],s=i[2],u=new K(o,r),l=new K(o,r),e.next=10,Promise.all([u.generate(a,16),l.generate(s,12)]);case 10:return p=e.sent,e.abrupt("return",{contentEncryptionKey:p[0],nonce:p[1]});case 12:case"end":return e.stop()}}),e,this)}))),function(e,t,r){return s.apply(this,arguments)})},{key:"_generateContext",value:(a=o(c().mark((function e(t,r){var n,i,o,a,s,u,l,p,d;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,S(t.getKey("p256dh"));case 2:return n=e.sent,i={clientPublicKey:n.publicKey,serverPublicKey:r.publicKey},e.next=6,Promise.all([k(i.clientPublicKey),k(i.serverPublicKey)]);case 6:return o=e.sent,a={clientPublicKey:o[0].publicKey,serverPublicKey:o[1].publicKey},s=new TextEncoder("utf-8"),u=s.encode("P-256"),l=new Uint8Array(1).fill(0),(p=new Uint8Array(2))[0]=0,p[1]=a.clientPublicKey.byteLength,(d=new Uint8Array(2))[0]=0,d[1]=a.serverPublicKey.byteLength,e.abrupt("return",_([u,l,p,a.clientPublicKey,d,a.serverPublicKey]));case 18:case"end":return e.stop()}}),e)}))),function(e,t){return a.apply(this,arguments)})},{key:"_generateCEKInfo",value:(i=o(c().mark((function e(t,r){var n,i,o,a;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return n=new TextEncoder("utf-8"),i=n.encode("Content-Encoding: aesgcm"),o=new Uint8Array(1).fill(0),e.next=5,this._generateContext(t,r);case 5:return a=e.sent,e.abrupt("return",_([i,o,a]));case 7:case"end":return e.stop()}}),e,this)}))),function(e,t){return i.apply(this,arguments)})},{key:"_generateNonceInfo",value:(n=o(c().mark((function e(t,r){var n,i,o,a;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return n=new TextEncoder("utf-8"),i=n.encode("Content-Encoding: nonce"),o=new Uint8Array(1).fill(0),e.next=5,this._generateContext(t,r);case 5:return a=e.sent,e.abrupt("return",_([i,o,a]));case 7:case"end":return e.stop()}}),e,this)}))),function(e,t){return n.apply(this,arguments)})},{key:"_generatePRK",value:(r=o(c().mark((function e(t,r){var n,i,o,a;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,this._getSharedSecret(t,r);case 2:return n=e.sent,i=new TextEncoder("utf-8"),o=i.encode("Content-Encoding: auth\0"),a=new K(n,t.getKey("auth")),e.abrupt("return",a.generate(o,32));case 7:case"end":return e.stop()}}),e,this)}))),function(e,t){return r.apply(this,arguments)})},{key:"_getSharedSecret",value:(t=o(c().mark((function e(t,r){var n,i;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,S(t.getKey("p256dh"));case 2:if((n=e.sent).publicKey instanceof CryptoKey){e.next=5;break}throw new Error("The publicKey must be a CryptoKey.");case 5:return i={name:"ECDH",namedCurve:"P-256",public:n.publicKey},e.abrupt("return",crypto.subtle.deriveBits(i,r.privateKey,256));case 7:case"end":return e.stop()}}),e)}))),function(e,r){return t.apply(this,arguments)})}],[{key:"generateServerKeys",value:function(){return crypto.subtle.generateKey({name:"ECDH",namedCurve:"P-256"},!0,["deriveBits"])}}]),e}(),U=function(){function e(){v(this,e)}var t;return b(e,null,[{key:"createVapidAuthHeader",value:(t=o(c().mark((function e(t,r,n,i){var o,a,s,u,l,p,d,f,h,y,v;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:if(r){e.next=2;break}return e.abrupt("return",Promise.reject(new Error("Audience must be the origin of the server")));case 2:if(n){e.next=4;break}return e.abrupt("return",Promise.reject(new Error("Subject must be either a mailto or http link")));case 4:return"number"!=typeof i&&(i=Math.floor(Date.now()/1e3+43200)),o=w(t.publicKey),a=w(t.privateKey),r=new URL(r).origin,s={typ:"JWT",alg:"ES256"},u={aud:r,exp:i,sub:n},l=new TextEncoder("utf-8"),p=m(l.encode(JSON.stringify(s)))+"."+m(l.encode(JSON.stringify(u))),d={kty:"EC",crv:"P-256",x:m(o.subarray(1,33)),y:m(o.subarray(33,65)),d:m(a)},e.next=15,crypto.subtle.importKey("jwk",d,{name:"ECDSA",namedCurve:"P-256"},!0,["sign"]);case 15:return f=e.sent,e.next=18,crypto.subtle.sign({name:"ECDSA",hash:{name:"SHA-256"}},f,l.encode(p));case 18:return h=e.sent,y=p+"."+m(new Uint8Array(h)),v=m(o),e.abrupt("return",{Authorization:"vapid t=".concat(y,", k=").concat(v)});case 22:case"end":return e.stop()}}),e)}))),function(e,r,n,i){return t.apply(this,arguments)})}]),e}(),A=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};v(this,e),this._b64ServerKeys=t.serverKeys,this._b64Salt=t.salt,this._b4VapidKeys=t.vapidKeys}var t,r,n,i,a,s,u;return b(e,[{key:"getServerKeys",value:function(){return this._b64ServerKeys?S(w(this._b64ServerKeys.publicKey),w(this._b64ServerKeys.privateKey)):e.generateServerKeys()}},{key:"getSalt",value:function(){return this._b64Salt?w(this._b64Salt):P()}},{key:"getVapidKeys",value:function(){return this._b4VapidKeys?this._b4VapidKeys:I}},{key:"getRequestDetails",value:(u=o(c().mark((function e(t,r){var n,i,o,a,s,u,l;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return n=U,i=t.endpoint,e.next=4,n.createVapidAuthHeader(this.getVapidKeys(),t.endpoint,"mailto:simple-push-demo@gauntface.co.uk");case 4:return o=e.sent,e.next=7,this.encryptPayload(t,r);case 7:return a=e.sent,s=null,(u={}).TTL=60,a?(s=a.cipherText,u["Content-Encoding"]="aes128gcm"):u["Content-Length"]=0,o&&Object.keys(o).forEach((function(e){u[e]=o[e]})),l={headers:u,endpoint:i},s&&(l.body=s),e.abrupt("return",l);case 16:case"end":return e.stop()}}),e,this)}))),function(e,t){return u.apply(this,arguments)})},{key:"encryptPayload",value:(s=o(c().mark((function e(t,r){var n,i,o,a,s,u,l,p,d,f,h,y;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:if(r&&0!==r.trim().length){e.next=2;break}return e.abrupt("return",Promise.resolve(null));case 2:return n=this.getSalt(),e.next=5,this.getServerKeys();case 5:return i=e.sent,e.next=8,k(i.publicKey);case 8:return o=e.sent,e.next=11,this._generateEncryptionKeys(t,n,i);case 11:return a=e.sent,e.next=14,crypto.subtle.importKey("raw",a.contentEncryptionKey,"AES-GCM",!0,["decrypt","encrypt"]);case 14:return s=e.sent,a.contentEncryptionCryptoKey=s,u=new TextEncoder("utf-8"),l=u.encode(r),(p=new Uint8Array(1)).fill(0),p[0]=2,d=_([l,p]),f={name:"AES-GCM",tagLength:128,iv:a.nonce},e.next=26,crypto.subtle.encrypt(f,a.contentEncryptionCryptoKey,d);case 26:return h=e.sent,e.next=29,this._addEncryptionContentCodingHeader(h,i,n);case 29:return y=e.sent,e.abrupt("return",{cipherText:y,salt:m(n),publicServerKey:m(o.publicKey)});case 31:case"end":return e.stop()}}),e,this)}))),function(e,t){return s.apply(this,arguments)})},{key:"_addEncryptionContentCodingHeader",value:(a=o(c().mark((function e(t,r,n){var i,o,a,s,u;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,k(r.publicKey);case 2:return i=e.sent,o=new Uint8Array([0,0,16,0]),(a=new Uint8Array(1))[0]=i.publicKey.byteLength,s=[n,o,a,i.publicKey,new Uint8Array(t)],u=_(s),e.abrupt("return",u.buffer);case 9:case"end":return e.stop()}}),e)}))),function(e,t,r){return a.apply(this,arguments)})},{key:"_generateEncryptionKeys",value:(i=o(c().mark((function e(t,r,n){var i,o,a,s,u,l,p;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,Promise.all([this._generatePRK(t,n),this._generateCEKInfo(t,n),this._generateNonceInfo(t,n)]);case 2:return i=e.sent,o=i[0],a=i[1],s=i[2],u=new K(o,r),l=new K(o,r),e.next=10,Promise.all([u.generate(a,16),l.generate(s,12)]);case 10:return p=e.sent,e.abrupt("return",{contentEncryptionKey:p[0],nonce:p[1]});case 12:case"end":return e.stop()}}),e,this)}))),function(e,t,r){return i.apply(this,arguments)})},{key:"_generateCEKInfo",value:function(){return _([new TextEncoder("utf-8").encode("Content-Encoding: aes128gcm"),new Uint8Array(1).fill(0)])}},{key:"_generateNonceInfo",value:function(){return _([new TextEncoder("utf-8").encode("Content-Encoding: nonce"),new Uint8Array(1).fill(0)])}},{key:"_generatePRK",value:(n=o(c().mark((function e(t,r){var n,i,o;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,this._getSharedSecret(t,r);case 2:return n=e.sent,e.next=5,this._getKeyInfo(t,r);case 5:return i=e.sent,o=new K(n,t.getKey("auth")),e.abrupt("return",o.generate(i,32));case 8:case"end":return e.stop()}}),e,this)}))),function(e,t){return n.apply(this,arguments)})},{key:"_getSharedSecret",value:(r=o(c().mark((function e(t,r){var n,i;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,S(t.getKey("p256dh"));case 2:if((n=e.sent).publicKey instanceof CryptoKey){e.next=5;break}throw new Error("The publicKey must be a CryptoKey.");case 5:return i={name:"ECDH",namedCurve:"P-256",public:n.publicKey},e.abrupt("return",crypto.subtle.deriveBits(i,r.privateKey,256));case 7:case"end":return e.stop()}}),e)}))),function(e,t){return r.apply(this,arguments)})},{key:"_getKeyInfo",value:(t=o(c().mark((function e(t,r){var n,i;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return n=new TextEncoder("utf-8"),e.next=3,k(r.publicKey);case 3:return i=e.sent,e.abrupt("return",_([n.encode("WebPush: info"),new Uint8Array(1).fill(0),new Uint8Array(t.getKey("p256dh")),i.publicKey]));case 5:case"end":return e.stop()}}),e)}))),function(e,r){return t.apply(this,arguments)})}],[{key:"generateServerKeys",value:function(){return crypto.subtle.generateKey({name:"ECDH",namedCurve:"P-256"},!0,["deriveBits"])}}]),e}();function T(e,t){(null==t||t>e.length)&&(t=e.length);for(var r=0,n=new Array(t);r<t;r++)n[r]=e[r];return n}var N,j,R,D=function(){function e(){v(this,e)}return b(e,null,[{key:"supportedEncodings",value:function(){return PushManager.supportedContentEncodings?PushManager.supportedContentEncodings:["aes128gcm"]}},{key:"generateHelper",value:function(){var e,t=this.supportedEncodings(),r=function(e,t){var r="undefined"!=typeof Symbol&&e[Symbol.iterator]||e["@@iterator"];if(!r){if(Array.isArray(e)||(r=function(e,t){if(e){if("string"==typeof e)return T(e,t);var r=Object.prototype.toString.call(e).slice(8,-1);return"Object"===r&&e.constructor&&(r=e.constructor.name),"Map"===r||"Set"===r?Array.from(e):"Arguments"===r||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(r)?T(e,t):void 0}}(e))||t&&e&&"number"==typeof e.length){r&&(e=r);var n=0,i=function(){};return{s:i,n:function(){return n>=e.length?{done:!0}:{done:!1,value:e[n++]}},e:function(e){throw e},f:i}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var o,a=!0,c=!1;return{s:function(){r=r.call(e)},n:function(){var e=r.next();return a=e.done,e},e:function(e){c=!0,o=e},f:function(){try{a||null==r.return||r.return()}finally{if(c)throw o}}}}(t);try{for(r.s();!(e=r.n()).done;){var n=e.value;switch(n){case"aes128gcm":return new A;case"aesgcm":return new L;default:console.warn("Unknown content encoding: ".concat(n))}}}catch(e){r.e(e)}finally{r.f()}throw console.error("Failed to find a known encoding: ",t),new Error("Unable to find a known encoding")}}]),e}(),M=function(){function e(t,r,n){v(this,e),this._stateChangeCb=t,this._subscriptionUpdate=r,this._publicApplicationKey=w(n),this._state={UNSUPPORTED:{id:"UNSUPPORTED",interactive:!1,pushEnabled:!1},INITIALISING:{id:"INITIALISING",interactive:!1,pushEnabled:!1},PERMISSION_DENIED:{id:"PERMISSION_DENIED",interactive:!1,pushEnabled:!1},PERMISSION_GRANTED:{id:"PERMISSION_GRANTED",interactive:!0},PERMISSION_PROMPT:{id:"PERMISSION_PROMPT",interactive:!0,pushEnabled:!1},ERROR:{id:"ERROR",interactive:!1,pushEnabled:!1},STARTING_SUBSCRIBE:{id:"STARTING_SUBSCRIBE",interactive:!1,pushEnabled:!0},SUBSCRIBED:{id:"SUBSCRIBED",interactive:!0,pushEnabled:!0},STARTING_UNSUBSCRIBE:{id:"STARTING_UNSUBSCRIBE",interactive:!1,pushEnabled:!1},UNSUBSCRIBED:{id:"UNSUBSCRIBED",interactive:!0,pushEnabled:!1}},"serviceWorker"in navigator?"PushManager"in window?"showNotification"in ServiceWorkerRegistration.prototype?this.init():this._stateChangeCb(this._state.UNSUPPORTED,"Showing Notifications from a service worker is not available on this browser"):this._stateChangeCb(this._state.UNSUPPORTED,"PushManager not available on this browser"):this._stateChangeCb(this._state.UNSUPPORTED,"Service worker not available on this browser")}var t,r,n,i;return b(e,[{key:"init",value:(i=o(c().mark((function e(){return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.next=2,navigator.serviceWorker.ready;case 2:this._stateChangeCb(this._state.INITIALISING),this.setUpPushPermission();case 4:case"end":return e.stop()}}),e,this)}))),function(){return i.apply(this,arguments)})},{key:"_permissionStateChange",value:function(e){switch(e){case"denied":this._stateChangeCb(this._state.PERMISSION_DENIED);break;case"granted":this._stateChangeCb(this._state.PERMISSION_GRANTED);break;case"default":this._stateChangeCb(this._state.PERMISSION_PROMPT);break;default:console.error("Unexpected permission state: ",e)}}},{key:"setUpPushPermission",value:(n=o(c().mark((function e(){var t,r;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.prev=0,this._permissionStateChange(Notification.permission),e.next=4,navigator.serviceWorker.ready;case 4:return t=e.sent,e.next=7,t.pushManager.getSubscription();case 7:if(r=e.sent,this._subscriptionUpdate(r),r){e.next=11;break}return e.abrupt("return");case 11:this._stateChangeCb(this._state.SUBSCRIBED),e.next=18;break;case 14:e.prev=14,e.t0=e.catch(0),console.error("setUpPushPermission() ",e.t0),this._stateChangeCb(this._state.ERROR,e.t0);case 18:case"end":return e.stop()}}),e,this,[[0,14]])}))),function(){return n.apply(this,arguments)})},{key:"subscribeDevice",value:(r=o(c().mark((function e(){var t,r;return c().wrap((function(e){for(;;)switch(e.prev=e.next){case 0:this._stateChangeCb(this._state.STARTING_SUBSCRIBE),e.prev=1,e.t0=Notification.permission,e.next="denied"===e.t0?5:"granted"===e.t0?6:7;break;case 5:throw new Error("Push messages are blocked.");case 6:return e.abrupt("break",9);case 7:return e.next=9,new Promise((function(e,t){Notification.requestPermission((function(r){"granted"!==r&&t(new Error("Bad permission result")),e()}))}));case 9:return e.prev=9,e.next=12,navigator.serviceWorker.ready;case 12:return t=e.sent,e.next=15,t.pushManager.subscribe({userVisibleOnly:!0,applicationServerKey:this._publicApplicationKey});case 15:r=e.sent,this._stateChangeCb(this._state.SUBSCRIBED),this._subscriptionUpdate(r),e.next=24;break;case 20:e.prev=20,e.t1=e.catch(9),console.error("subscribeDevice() 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