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import autobind from 'autobind-decorator';
import { PageVar, envVarsDef, Fn, HpmlScope, HpmlError } from '.';
import { version } from '@/config';
import { AiScript, utils, values } from '@syuilo/aiscript';
import { createAiScriptEnv } from '../aiscript/api';
import { collectPageVars } from '../collect-page-vars';
import { initHpmlLib, initAiLib } from './lib';
import * as os from '@/os';
import { markRaw, ref, Ref, unref } from 'vue';
import { Expr, isLiteralValue, Variable } from './expr';
/**
* Hpml evaluator
*/
export class Hpml {
private variables: Variable[];
private pageVars: PageVar[];
private envVars: Record<keyof typeof envVarsDef, any>;
public aiscript?: AiScript;
public pageVarUpdatedCallback?: values.VFn;
public canvases: Record<string, HTMLCanvasElement> = {};
public vars: Ref<Record<string, any>> = ref({});
public page: Record<string, any>;
private opts: {
randomSeed: string; visitor?: any; url?: string;
enableAiScript: boolean;
};
constructor(page: Hpml['page'], opts: Hpml['opts']) {
this.page = page;
this.variables = this.page.variables;
this.pageVars = collectPageVars(this.page.content);
this.opts = opts;
if (this.opts.enableAiScript) {
this.aiscript = markRaw(new AiScript({ ...createAiScriptEnv({
storageKey: 'pages:' + this.page.id
}), ...initAiLib(this) }, {
in: (q) => {
return new Promise(ok => {
os.inputText({
title: q,
}).then(({ canceled, result: a }) => {
ok(a);
});
});
},
out: (value) => {
console.log(value);
},
log: (type, params) => {
},
}));
this.aiscript.scope.opts.onUpdated = (name, value) => {
this.eval();
};
}
const date = new Date();
this.envVars = {
AI: 'kawaii',
VERSION: version,
URL: this.page ? `${opts.url}/@${this.page.user.username}/pages/${this.page.name}` : '',
LOGIN: opts.visitor != null,
NAME: opts.visitor ? opts.visitor.name || opts.visitor.username : '',
USERNAME: opts.visitor ? opts.visitor.username : '',
USERID: opts.visitor ? opts.visitor.id : '',
NOTES_COUNT: opts.visitor ? opts.visitor.notesCount : 0,
FOLLOWERS_COUNT: opts.visitor ? opts.visitor.followersCount : 0,
FOLLOWING_COUNT: opts.visitor ? opts.visitor.followingCount : 0,
IS_CAT: opts.visitor ? opts.visitor.isCat : false,
SEED: opts.randomSeed ? opts.randomSeed : '',
YMD: `${date.getFullYear()}/${date.getMonth() + 1}/${date.getDate()}`,
AISCRIPT_DISABLED: !this.opts.enableAiScript,
NULL: null
};
this.eval();
}
@autobind
public eval() {
try {
this.vars.value = this.evaluateVars();
} catch (err) {
//this.onError(e);
}
}
@autobind
public interpolate(str: string) {
if (str == null) return null;
return str.replace(/{(.+?)}/g, match => {
const v = unref(this.vars)[match.slice(1, -1).trim()];
return v == null ? 'NULL' : v.toString();
});
}
@autobind
public callAiScript(fn: string) {
try {
if (this.aiscript) this.aiscript.execFn(this.aiscript.scope.get(fn), []);
} catch (err) {}
}
@autobind
public registerCanvas(id: string, canvas: any) {
this.canvases[id] = canvas;
}
@autobind
public updatePageVar(name: string, value: any) {
const pageVar = this.pageVars.find(v => v.name === name);
if (pageVar !== undefined) {
pageVar.value = value;
if (this.pageVarUpdatedCallback) {
if (this.aiscript) this.aiscript.execFn(this.pageVarUpdatedCallback, [values.STR(name), utils.jsToVal(value)]);
}
} else {
throw new HpmlError(`No such page var '${name}'`);
}
}
@autobind
public updateRandomSeed(seed: string) {
this.opts.randomSeed = seed;
this.envVars.SEED = seed;
}
@autobind
private _interpolateScope(str: string, scope: HpmlScope) {
return str.replace(/{(.+?)}/g, match => {
const v = scope.getState(match.slice(1, -1).trim());
return v == null ? 'NULL' : v.toString();
});
}
@autobind
public evaluateVars(): Record<string, any> {
const values: Record<string, any> = {};
for (const [k, v] of Object.entries(this.envVars)) {
values[k] = v;
}
for (const v of this.pageVars) {
values[v.name] = v.value;
}
for (const v of this.variables) {
values[v.name] = this.evaluate(v, new HpmlScope([values]));
}
return values;
}
@autobind
private evaluate(expr: Expr, scope: HpmlScope): any {
if (isLiteralValue(expr)) {
if (expr.type === null) {
return null;
}
if (expr.type === 'number') {
return parseInt((expr.value as any), 10);
}
if (expr.type === 'text' || expr.type === 'multiLineText') {
return this._interpolateScope(expr.value || '', scope);
}
if (expr.type === 'textList') {
return this._interpolateScope(expr.value || '', scope).trim().split('\n');
}
if (expr.type === 'ref') {
return scope.getState(expr.value);
}
if (expr.type === 'aiScriptVar') {
if (this.aiscript) {
try {
return utils.valToJs(this.aiscript.scope.get(expr.value));
} catch (err) {
return null;
}
} else {
return null;
}
}
// Define user function
if (expr.type === 'fn') {
return {
slots: expr.value.slots.map(x => x.name),
exec: (slotArg: Record<string, any>) => {
return this.evaluate(expr.value.expression, scope.createChildScope(slotArg, expr.id));
}
} as Fn;
}
return;
}
// Call user function
if (expr.type.startsWith('fn:')) {
const fnName = expr.type.split(':')[1];
const fn = scope.getState(fnName);
const args = {} as Record<string, any>;
for (let i = 0; i < fn.slots.length; i++) {
const name = fn.slots[i];
args[name] = this.evaluate(expr.args[i], scope);
}
return fn.exec(args);
}
if (expr.args === undefined) return null;
const funcs = initHpmlLib(expr, scope, this.opts.randomSeed, this.opts.visitor);
// Call function
const fnName = expr.type;
const fn = (funcs as any)[fnName];
if (fn == null) {
throw new HpmlError(`No such function '${fnName}'`);
} else {
return fn(...expr.args.map(x => this.evaluate(x, scope)));
}
}
}
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