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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const identifierUtils = require("./util/identifier");
class RecordIdsPlugin {
apply(compiler) {
compiler.plugin("compilation", compilation => {
compilation.plugin("record-modules", (modules, records) => {
if(!records.modules) records.modules = {};
if(!records.modules.byIdentifier) records.modules.byIdentifier = {};
if(!records.modules.usedIds) records.modules.usedIds = {};
modules.forEach(function(module) {
if(!module.portableId) module.portableId = identifierUtils.makePathsRelative(compiler.context, module.identifier());
const identifier = module.portableId;
records.modules.byIdentifier[identifier] = module.id;
records.modules.usedIds[module.id] = module.id;
});
});
compilation.plugin("revive-modules", (modules, records) => {
if(!records.modules) return;
if(records.modules.byIdentifier) {
const usedIds = {};
modules.forEach(function(module) {
if(module.id !== null) return;
if(!module.portableId) module.portableId = identifierUtils.makePathsRelative(compiler.context, module.identifier());
const identifier = module.portableId;
const id = records.modules.byIdentifier[identifier];
if(id === undefined) return;
if(usedIds[id]) return;
usedIds[id] = true;
module.id = id;
});
}
compilation.usedModuleIds = records.modules.usedIds;
});
function getDepBlockIdent(chunk, block) {
const ident = [];
if(block.chunks.length > 1)
ident.push(block.chunks.indexOf(chunk));
while(block.parent) {
const p = block.parent;
const idx = p.blocks.indexOf(block);
const l = p.blocks.length - 1;
ident.unshift(`${idx}/${l}`);
block = block.parent;
}
if(!block.identifier) return null;
ident.unshift(identifierUtils.makePathsRelative(compiler.context, block.identifier()));
return ident.join(":");
}
compilation.plugin("record-chunks", (chunks, records) => {
records.nextFreeChunkId = compilation.nextFreeChunkId;
if(!records.chunks) records.chunks = {};
if(!records.chunks.byName) records.chunks.byName = {};
if(!records.chunks.byBlocks) records.chunks.byBlocks = {};
records.chunks.usedIds = {};
chunks.forEach(chunk => {
const name = chunk.name;
const blockIdents = chunk.blocks.map(getDepBlockIdent.bind(null, chunk)).filter(Boolean);
if(name) records.chunks.byName[name] = chunk.id;
blockIdents.forEach((blockIdent) => {
records.chunks.byBlocks[blockIdent] = chunk.id;
});
records.chunks.usedIds[chunk.id] = chunk.id;
});
});
compilation.plugin("revive-chunks", (chunks, records) => {
if(!records.chunks) return;
const usedIds = {};
if(records.chunks.byName) {
chunks.forEach(function(chunk) {
if(chunk.id !== null) return;
if(!chunk.name) return;
const id = records.chunks.byName[chunk.name];
if(id === undefined) return;
if(usedIds[id]) return;
usedIds[id] = true;
chunk.id = id;
});
}
if(records.chunks.byBlocks) {
const argumentedChunks = chunks.filter(chunk => chunk.id === null).map(chunk => ({
chunk,
blockIdents: chunk.blocks.map(getDepBlockIdent.bind(null, chunk)).filter(Boolean)
})).filter(arg => arg.blockIdents.length > 0);
let blockIdentsCount = {};
argumentedChunks.forEach((arg, idx) => {
arg.blockIdents.forEach(blockIdent => {
const id = records.chunks.byBlocks[blockIdent];
if(typeof id !== "number") return;
const accessor = `${id}:${idx}`;
blockIdentsCount[accessor] = (blockIdentsCount[accessor] || 0) + 1;
});
});
blockIdentsCount = Object.keys(blockIdentsCount).map(accessor => [blockIdentsCount[accessor]].concat(accessor.split(":").map(Number))).sort((a, b) => b[0] - a[0]);
blockIdentsCount.forEach(function(arg) {
const id = arg[1];
if(usedIds[id]) return;
const idx = arg[2];
const chunk = argumentedChunks[idx].chunk;
if(chunk.id !== null) return;
usedIds[id] = true;
chunk.id = id;
});
}
compilation.usedChunkIds = records.chunks.usedIds;
});
});
}
}
module.exports = RecordIdsPlugin;
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