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var path = require('path');
var Immutable = require('immutable');
var Output = require('../models/output');
var Promise = require('../utils/promise');
var fs = require('../utils/fs');
var callHook = require('./callHook');
var preparePlugins = require('./preparePlugins');
var preparePages = require('./preparePages');
var prepareAssets = require('./prepareAssets');
var generateAssets = require('./generateAssets');
var generatePages = require('./generatePages');
/**
* Process an output to generate the book
*
* @param {Generator} generator
* @param {Output} output
* @return {Promise<Output>}
*/
function processOutput(generator, startOutput) {
return Promise(startOutput)
.then(preparePlugins)
.then(preparePages)
.then(prepareAssets)
.then(
callHook.bind(null,
'config',
function(output) {
var book = output.getBook();
var config = book.getConfig();
var values = config.getValues();
return values.toJS();
},
function(output, result) {
var book = output.getBook();
var config = book.getConfig();
config = config.updateValues(result);
book = book.set('config', config);
return output.set('book', book);
}
)
)
.then(
callHook.bind(null,
'init',
function(output) {
return {};
},
function(output) {
return output;
}
)
)
.then(function(output) {
if (!generator.onInit) {
return output;
}
return generator.onInit(output);
})
.then(generateAssets.bind(null, generator))
.then(generatePages.bind(null, generator))
.tap(function(output) {
var book = output.getBook();
if (!book.isMultilingual()) {
return;
}
var logger = book.getLogger();
var books = book.getBooks();
var outputRoot = output.getRoot();
var plugins = output.getPlugins();
var state = output.getState();
var options = output.getOptions();
return Promise.forEach(books, function(langBook) {
// Inherits plugins list, options and state
var langOptions = options.set('root', path.join(outputRoot, langBook.getLanguage()));
var langOutput = new Output({
book: langBook,
options: langOptions,
state: state,
generator: generator.name,
plugins: plugins
});
logger.info.ln('');
logger.info.ln('generating language "' + langBook.getLanguage() + '"');
return processOutput(generator, langOutput);
});
})
.then(callHook.bind(null,
'finish:before',
function(output) {
return {};
},
function(output) {
return output;
}
)
)
.then(function(output) {
if (!generator.onFinish) {
return output;
}
return generator.onFinish(output);
})
.then(callHook.bind(null,
'finish',
function(output) {
return {};
},
function(output) {
return output;
}
)
);
}
/**
* Generate a book using a generator.
*
* The overall process is:
* 1. List and load plugins for this book
* 2. Call hook "config"
* 3. Call hook "init"
* 4. Initialize generator
* 5. List all assets and pages
* 6. Copy all assets to output
* 7. Generate all pages
* 8. Call hook "finish:before"
* 9. Finish generation
* 10. Call hook "finish"
*
*
* @param {Generator} generator
* @param {Book} book
* @param {Object} options
* @return {Promise<Output>}
*/
function generateBook(generator, book, options) {
options = generator.Options(options);
var state = generator.State? generator.State({}) : Immutable.Map();
var start = Date.now();
return Promise(
new Output({
book: book,
options: options,
state: state,
generator: generator.name
})
)
// Cleanup output folder
.then(function(output) {
var logger = output.getLogger();
var rootFolder = output.getRoot();
logger.debug.ln('cleanup folder "' + rootFolder + '"');
return fs.ensureFolder(rootFolder)
.thenResolve(output);
})
.then(processOutput.bind(null, generator))
// Log duration and end message
.then(function(output) {
var logger = output.getLogger();
var end = Date.now();
var duration = (end - start)/1000;
logger.info.ok('generation finished with success in ' + duration.toFixed(1) + 's !');
return output;
});
}
module.exports = generateBook;
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