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be-hashing-out.js
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be-hashing-out.js
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// @ts-check
import { BE } from 'be-enhanced/BE.js';
import { propInfo, rejected, resolved } from 'be-enhanced/cc.js';
import { registry } from './register.js';
/** @import {BEConfig, IEnhancement, BEAllProps} from './ts-refs/be-enhanced/types.d.ts' */
/** @import {Actions, PAP, AP, BAP} from './ts-refs/be-hashing-out/types' */;
import { dispatchEvent as de } from 'trans-render/positractions/dispatchEvent.js';
/**
* @implements {Actions}
*
*
*/
class BeHashingOut extends BE {
de = de;
/**
* @type {BEConfig<BAP, Actions & IEnhancement, any>}
*/
static config = {
propInfo: {
...propInfo,
digest: {}
},
actions: {
logDigest: {
ifNoneOf: 'digest'
},
checkDigest:{
ifAllOf: 'digest'
}
},
positractions:[resolved, rejected]
}
/**
*
* @param {BAP} self
*/
async logDigest(self) {
const {enhancedElement} = self;
const msg = this.#getVals(enhancedElement.attributes);
const digest = await this.digestMessage(msg);
const suggestedAttr = `${be_hashing_out}${digest}"`
console.error(String.raw `
Suggested markup:
<script type=module>
import {register} from 'be-hashing-out/register.js';
register('${digest}');
</script>
Suggested Attr:
${suggestedAttr}
`);
return /** @type {PAP} */({
rejected: true,
resolved: false,
});
}
/**
* @type {{[key: string]: string} | undefined}
*/
#attrsWhenLastChecked;
/**
*
* @param {NamedNodeMap} attrs
*/
#getVals(attrs){
/** @type {Array<string>} */
const vals = [];
this.#attrsWhenLastChecked = {};
for(const attr of attrs){
if(attr.name === 'be-hashing-out') continue;
this.#attrsWhenLastChecked[attr.name] = attr.value;
vals.push(`${attr.name}=${attr.value}`);
}
return vals.join(',');
}
/**
*
* @param {Array<string>} attrs
*
*/
confirm(attrs){
const self = /** @type {BAP} */ this;
const {enhancedElement} = self;
const lastChecked = this.#attrsWhenLastChecked;
if(lastChecked === undefined){
return attrs.length === 0;
}
for(const attr of attrs){
if(enhancedElement.getAttribute(attr) !== lastChecked[attr]){
return false;
}
}
return true;
}
/**
*
* @param {BAP} self
*/
async checkDigest(self) {
const {enhancedElement, digest} = self;
const msg = this.#getVals(enhancedElement.attributes);
const digest2 = await this.digestMessage(msg);
if(digest !== digest2 || !registry.has(digest)){
console.error(`${digest}!==${digest2}`);
return /** @type {PAP} */({
rejected: true,
resolved: false,
});
}
return /** @type {PAP} */({
resolved: true,
rejected: false,
});
}
/**
*
* @param {string} message
* @returns {Promise<string>}
*/
async digestMessage(message) {
const encoder = new TextEncoder();
const data = encoder.encode(message);
const hashBuffer = await crypto.subtle.digest('SHA-256', data);
const hashArray = Array.from(new Uint8Array(hashBuffer)); // convert buffer to byte array
const hashHex = hashArray
.map((b) => b.toString(16).padStart(2, "0"))
.join(""); // convert bytes to hex string
return hashHex;
}
}
const be_hashing_out = 'be-hashing-out="';
const len = be_hashing_out.length;
await BeHashingOut.bootUp();
export {BeHashingOut};