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/*
* SPDX-FileCopyrightText: syuilo and other misskey contributors
* SPDX-License-Identifier: AGPL-3.0-only
*/
import { generate } from 'astring';
import * as estree from 'estree';
import { walk } from '../node_modules/estree-walker/src/index.js';
import type * as estreeWalker from 'estree-walker';
import type { Plugin } from 'vite';
function isFalsyIdentifier(identifier: estree.Identifier): boolean {
return identifier.name === 'undefined' || identifier.name === 'NaN';
}
function normalizeClassWalker(tree: estree.Node): string | null {
if (tree.type === 'Identifier') return isFalsyIdentifier(tree) ? '' : null;
if (tree.type === 'Literal') return typeof tree.value === 'string' ? tree.value : '';
if (tree.type === 'BinaryExpression') {
if (tree.operator !== '+') return null;
const left = normalizeClassWalker(tree.left);
const right = normalizeClassWalker(tree.right);
if (left === null || right === null) return null;
return `${left}${right}`;
}
if (tree.type === 'TemplateLiteral') {
if (tree.expressions.some((x) => x.type !== 'Literal' && (x.type !== 'Identifier' || !isFalsyIdentifier(x)))) return null;
return tree.quasis.reduce((a, c, i) => {
const v = i === tree.quasis.length - 1 ? '' : (tree.expressions[i] as Partial<estree.Literal>).value;
return a + c.value.raw + (typeof v === 'string' ? v : '');
}, '');
}
if (tree.type === 'ArrayExpression') {
const values = tree.elements.map((treeNode) => {
if (treeNode === null) return '';
if (treeNode.type === 'SpreadElement') return normalizeClassWalker(treeNode.argument);
return normalizeClassWalker(treeNode);
});
if (values.some((x) => x === null)) return null;
return values.join(' ');
}
if (tree.type === 'ObjectExpression') {
const values = tree.properties.map((treeNode) => {
if (treeNode.type === 'SpreadElement') return normalizeClassWalker(treeNode.argument);
let x = treeNode.value;
let inveted = false;
while (x.type === 'UnaryExpression' && x.operator === '!') {
x = x.argument;
inveted = !inveted;
}
if (x.type === 'Literal') {
if (inveted === !x.value) {
return treeNode.key.type === 'Identifier' ? treeNode.computed ? null : treeNode.key.name : treeNode.key.type === 'Literal' ? treeNode.key.value : '';
} else {
return '';
}
}
if (x.type === 'Identifier') {
if (inveted !== isFalsyIdentifier(x)) {
return '';
} else {
return null;
}
}
return null;
});
if (values.some((x) => x === null)) return null;
return values.join(' ');
}
console.error(`Unexpected node type: ${tree.type}`);
return null;
}
export function normalizeClass(tree: estree.Node): string | null {
const walked = normalizeClassWalker(tree);
return walked && walked.replace(/^\s+|\s+(?=\s)|\s+$/g, '');
}
export function unwindCssModuleClassName(ast: estree.Node): void {
(walk as typeof estreeWalker.walk)(ast, {
enter(node, parent): void {
if (parent?.type !== 'Program') return;
if (node.type !== 'VariableDeclaration') return;
if (node.declarations.length !== 1) return;
if (node.declarations[0].id.type !== 'Identifier') return;
const name = node.declarations[0].id.name;
if (node.declarations[0].init?.type !== 'CallExpression') return;
if (node.declarations[0].init.callee.type !== 'Identifier') return;
if (node.declarations[0].init.callee.name !== '_export_sfc') return;
if (node.declarations[0].init.arguments.length !== 2) return;
if (node.declarations[0].init.arguments[0].type !== 'Identifier') return;
const ident = node.declarations[0].init.arguments[0].name;
if (!ident.startsWith('_sfc_main')) return;
if (node.declarations[0].init.arguments[1].type !== 'ArrayExpression') return;
if (node.declarations[0].init.arguments[1].elements.length === 0) return;
const __cssModulesIndex = node.declarations[0].init.arguments[1].elements.findIndex((x) => {
if (x?.type !== 'ArrayExpression') return false;
if (x.elements.length !== 2) return false;
if (x.elements[0]?.type !== 'Literal') return false;
if (x.elements[0].value !== '__cssModules') return false;
if (x.elements[1]?.type !== 'Identifier') return false;
return true;
});
if (!~__cssModulesIndex) return;
const cssModuleForestName = ((node.declarations[0].init.arguments[1].elements[__cssModulesIndex] as estree.ArrayExpression).elements[1] as estree.Identifier).name;
const cssModuleForestNode = parent.body.find((x) => {
if (x.type !== 'VariableDeclaration') return false;
if (x.declarations.length !== 1) return false;
if (x.declarations[0].id.type !== 'Identifier') return false;
if (x.declarations[0].id.name !== cssModuleForestName) return false;
if (x.declarations[0].init?.type !== 'ObjectExpression') return false;
return true;
}) as unknown as estree.VariableDeclaration;
const moduleForest = new Map((cssModuleForestNode.declarations[0].init as estree.ObjectExpression).properties.flatMap((property) => {
if (property.type !== 'Property') return [];
if (property.key.type !== 'Literal') return [];
if (property.value.type !== 'Identifier') return [];
return [[property.key.value as string, property.value.name as string]];
}));
const sfcMain = parent.body.find((x) => {
if (x.type !== 'VariableDeclaration') return false;
if (x.declarations.length !== 1) return false;
if (x.declarations[0].id.type !== 'Identifier') return false;
if (x.declarations[0].id.name !== ident) return false;
return true;
}) as unknown as estree.VariableDeclaration;
if (sfcMain.declarations[0].init?.type !== 'CallExpression') return;
if (sfcMain.declarations[0].init.callee.type !== 'Identifier') return;
if (sfcMain.declarations[0].init.callee.name !== 'defineComponent') return;
if (sfcMain.declarations[0].init.arguments.length !== 1) return;
if (sfcMain.declarations[0].init.arguments[0].type !== 'ObjectExpression') return;
const setup = sfcMain.declarations[0].init.arguments[0].properties.find((x) => {
if (x.type !== 'Property') return false;
if (x.key.type !== 'Identifier') return false;
if (x.key.name !== 'setup') return false;
return true;
}) as unknown as estree.Property;
if (setup.value.type !== 'FunctionExpression') return;
const render = setup.value.body.body.find((x) => {
if (x.type !== 'ReturnStatement') return false;
return true;
}) as unknown as estree.ReturnStatement;
if (render.argument?.type !== 'ArrowFunctionExpression') return;
if (render.argument.params.length !== 2) return;
const ctx = render.argument.params[0];
if (ctx.type !== 'Identifier') return;
if (ctx.name !== '_ctx') return;
if (render.argument.body.type !== 'BlockStatement') return;
for (const [key, value] of moduleForest) {
const cssModuleTreeNode = parent.body.find((x) => {
if (x.type !== 'VariableDeclaration') return false;
if (x.declarations.length !== 1) return false;
if (x.declarations[0].id.type !== 'Identifier') return false;
if (x.declarations[0].id.name !== value) return false;
return true;
}) as unknown as estree.VariableDeclaration;
if (cssModuleTreeNode.declarations[0].init?.type !== 'ObjectExpression') return;
const moduleTree = new Map(cssModuleTreeNode.declarations[0].init.properties.flatMap((property) => {
if (property.type !== 'Property') return [];
const actualKey = property.key.type === 'Identifier' ? property.key.name : property.key.type === 'Literal' ? property.key.value : null;
if (typeof actualKey !== 'string') return [];
if (property.value.type === 'Literal') return [[actualKey, property.value.value as string]];
if (property.value.type !== 'Identifier') return [];
const labelledValue = property.value.name;
const actualValue = parent.body.find((x) => {
if (x.type !== 'VariableDeclaration') return false;
if (x.declarations.length !== 1) return false;
if (x.declarations[0].id.type !== 'Identifier') return false;
if (x.declarations[0].id.name !== labelledValue) return false;
return true;
}) as unknown as estree.VariableDeclaration;
if (actualValue.declarations[0].init?.type !== 'Literal') return [];
return [[actualKey, actualValue.declarations[0].init.value as string]];
}));
(walk as typeof estreeWalker.walk)(render.argument.body, {
enter(childNode) {
if (childNode.type !== 'MemberExpression') return;
if (childNode.object.type !== 'MemberExpression') return;
if (childNode.object.object.type !== 'Identifier') return;
if (childNode.object.object.name !== ctx.name) return;
if (childNode.object.property.type !== 'Identifier') return;
if (childNode.object.property.name !== key) return;
if (childNode.property.type !== 'Identifier') return;
const actualValue = moduleTree.get(childNode.property.name);
if (actualValue === undefined) return;
this.replace({
type: 'Literal',
value: actualValue,
});
},
});
(walk as typeof estreeWalker.walk)(render.argument.body, {
enter(childNode) {
if (childNode.type !== 'MemberExpression') return;
if (childNode.object.type !== 'MemberExpression') return;
if (childNode.object.object.type !== 'Identifier') return;
if (childNode.object.object.name !== ctx.name) return;
if (childNode.object.property.type !== 'Identifier') return;
if (childNode.object.property.name !== key) return;
if (childNode.property.type !== 'Identifier') return;
console.error(`Undefined style detected: ${key}.${childNode.property.name} (in ${name})`);
this.replace({
type: 'Identifier',
name: 'undefined',
});
},
});
(walk as typeof estreeWalker.walk)(render.argument.body, {
enter(childNode) {
if (childNode.type !== 'CallExpression') return;
if (childNode.callee.type !== 'Identifier') return;
if (childNode.callee.name !== 'normalizeClass') return;
if (childNode.arguments.length !== 1) return;
const normalized = normalizeClass(childNode.arguments[0]);
if (normalized === null) return;
this.replace({
type: 'Literal',
value: normalized,
});
},
});
}
if (node.declarations[0].init.arguments[1].elements.length === 1) {
this.replace({
type: 'VariableDeclaration',
declarations: [{
type: 'VariableDeclarator',
id: {
type: 'Identifier',
name: node.declarations[0].id.name,
},
init: {
type: 'Identifier',
name: ident,
},
}],
kind: 'const',
});
} else {
this.replace({
type: 'VariableDeclaration',
declarations: [{
type: 'VariableDeclarator',
id: {
type: 'Identifier',
name: node.declarations[0].id.name,
},
init: {
type: 'CallExpression',
callee: {
type: 'Identifier',
name: '_export_sfc',
},
arguments: [{
type: 'Identifier',
name: ident,
}, {
type: 'ArrayExpression',
elements: node.declarations[0].init.arguments[1].elements.slice(0, __cssModulesIndex).concat(node.declarations[0].init.arguments[1].elements.slice(__cssModulesIndex + 1)),
}],
},
}],
kind: 'const',
});
}
},
});
}
// eslint-disable-next-line import/no-default-export
export default function pluginUnwindCssModuleClassName(): Plugin {
return {
name: 'UnwindCssModuleClassName',
renderChunk(code): { code: string } {
const ast = this.parse(code) as unknown as estree.Node;
unwindCssModuleClassName(ast);
return { code: generate(ast) };
},
};
}
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