More work on server book conversion

src/calibre/ebooks/conversion/config.py

@@ -45,6 +45,20 @@ def load_defaults(name):
     return r
 
 
+def load_all_defaults():
+    ans = {}
+    for x in os.listdir(config_dir):
+        if x.endswith('.py'):
+            path = os.path.join(config_dir, x)
+            with ExclusiveFile(path) as f:
+                raw = f.read()
+            r = GuiRecommendations()
+            if raw:
+                r.deserialize(raw)
+            ans[os.path.splitext(x)[0]] = r.copy()
+    return ans
+
+
 def save_specifics(db, book_id, recs):
     raw = recs.serialize()
     db.set_conversion_options(book_id, 'PIPE', raw)
@@ -146,14 +160,11 @@ def get_preferred_input_format_for_book(db, book_id):
 
 
 def sort_formats_by_preference(formats, prefs):
-    uprefs = [x.upper() for x in prefs]
+    uprefs = {x.upper():i for i, x in enumerate(prefs)}
 
     def key(x):
-        try:
-            return uprefs.index(x.upper())
-        except ValueError:
-            pass
-        return len(prefs)
+        return uprefs.get(x.upper(), len(prefs))
+
     return sorted(formats, key=key)
 
 
@@ -188,5 +199,16 @@ def get_output_formats(preferred_output_format):
             fmts.append(pfo)
     else:
         fmts = list(sorted(all_formats,
-                key=lambda x:{'EPUB':'!A', 'MOBI':'!B'}.get(x.upper(), x)))
+            key=lambda x:{'EPUB':'!A', 'AZW3':'!B', 'MOBI':'!C'}.get(x.upper(), x)))
+    return fmts
+
+
+def get_sorted_output_formats():
+    preferred_output_format = prefs['output_format'].upper()
+    fmts = get_output_formats(preferred_output_format)
+    try:
+        fmts.remove(preferred_output_format)
+    except Exception:
+        pass
+    fmts.insert(0, preferred_output_format)
     return fmts

src/calibre/srv/convert.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
+
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+from calibre.srv.errors import BookNotFound
+from calibre.srv.routes import endpoint, json
+from calibre.srv.utils import get_library_data
+
+
+def conversion_defaults():
+    from calibre.ebooks.conversion.config import load_all_defaults
+    ans = getattr(conversion_defaults, 'ans', None)
+    if ans is None:
+        ans = conversion_defaults.ans = load_all_defaults()
+    return ans
+
+
+@endpoint('/conversion/book-data/{book_id}', postprocess=json, types={'book_id': int})
+def conversion_data(ctx, rd, book_id):
+    from calibre.ebooks.conversion.config import (
+        NoSupportedInputFormats, get_input_format_for_book,
+        get_sorted_output_formats, load_specifics)
+    db = get_library_data(ctx, rd)[0]
+    if not ctx.has_id(rd, db, book_id):
+        raise BookNotFound(book_id, db)
+    try:
+        input_format, input_formats = get_input_format_for_book(db, book_id)
+    except NoSupportedInputFormats:
+        input_formats = []
+    else:
+        if input_format in input_formats:
+            input_formats.remove(input_format)
+            input_formats.insert(0, input_format)
+    ans = {
+        'input_formats': [x.upper() for x in input_formats],
+        'output_formats': get_sorted_output_formats(),
+        'conversion_defaults': conversion_defaults(),
+        'conversion_specifics': load_specifics(db, book_id),
+        'title': db.field_for('title', book_id),
+        'authors': db.field_for('authors', book_id),
+    }
+    return ans

src/calibre/srv/handler.py

@@ -179,7 +179,7 @@ class Context(object):
             return old[1]
 
 
-SRV_MODULES = ('ajax', 'books', 'cdb', 'code', 'content', 'legacy', 'opds', 'users_api')
+SRV_MODULES = ('ajax', 'books', 'cdb', 'code', 'content', 'legacy', 'opds', 'users_api', 'convert')
 
 
 class Handler(object):

src/pyj/book_list/book_details.pyj

@@ -14,7 +14,7 @@ from book_list.library_data import (
     book_metadata, cover_url, current_library_id, current_virtual_library,
     download_url, library_data, load_status, set_book_metadata
 )
-from book_list.router import back, home, open_book
+from book_list.router import back, home, open_book, report_a_load_failure
 from book_list.theme import get_color, get_font_size
 from book_list.top_bar import add_button, clear_buttons, create_top_bar, set_title
 from book_list.ui import query_as_href, set_panel_handler, show_panel
@@ -546,17 +546,10 @@ def create_book_details(container):
 
 
 def report_load_failure(container):
-    err = E.div()
-    safe_set_inner_html(err, load_status.error_html)
-    container.appendChild(E.div(
-        style='margin: 1ex 1em',
-        E.div(_('Failed to load books from calibre library, with error:')),
-        err,
-        E.div(
-            style='margin-top: 1em; border-top: solid 1px currentColor; padding-top: 1ex;',
-            E.a(onclick=def(): home(replace=True);, href='javascript: void(0)', style='color: blue', _('Go back to the home page')))
-        ),
-    )
+    report_a_load_failure(
+        container, _('Failed to load books from calibre library, with error:'),
+        load_status.error_html)
+
 
 
 def check_for_books_loaded():

src/pyj/book_list/convert_book.pyj

@@ -0,0 +1,89 @@
+# vim:fileencoding=utf-8
+# License: GPL v3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
+from __python__ import bound_methods, hash_literals
+
+from elementmaker import E
+from gettext import gettext as _
+
+from ajax import ajax
+from book_list.book_details import report_load_failure
+from book_list.library_data import load_status, url_books_query
+from book_list.router import back, report_a_load_failure
+from book_list.top_bar import create_top_bar
+from book_list.ui import set_panel_handler
+from dom import add_extra_css, build_rule, clear
+from utils import conditional_timeout, parse_url_params
+
+CLASS_NAME = 'convert-book-panel'
+
+add_extra_css(def():
+    sel = '.' + CLASS_NAME + ' '
+    style = build_rule(sel, placeholder='TODO: add this')
+    return style
+)
+
+
+conversion_data = None
+conversion_data_load_status = {'loading':True, 'ok':False, 'error_html':None, 'current_fetch': None}
+
+
+def on_data_loaded(end_type, xhr, ev):
+    nonlocal conversion_data
+    conversion_data_load_status.current_fetch = None
+
+    def bad_load(msg):
+        conversion_data_load_status.ok = False
+        conversion_data_load_status.loading = False
+        conversion_data_load_status.error_html = msg or xhr.error_html
+
+    if end_type is 'load':
+        conversion_data = JSON.parse(xhr.responseText)
+    elif end_type is 'abort':
+        pass
+    else:
+        bad_load()
+
+
+def fetch_conversion_data(book_id):
+    if conversion_data_load_status.current_fetch:
+        conversion_data_load_status.current_fetch.abort()
+    query = url_books_query()
+    conversion_data_load_status.loading = True
+    conversion_data_load_status.ok = False
+    conversion_data_load_status.error_html = None
+    conversion_data_load_status.current_fetch = ajax(f'conversion/books-data/{book_id}', on_data_loaded, query=query)
+    conversion_data_load_status.current_fetch.send()
+
+
+def on_close(container_id):
+    back()
+
+
+def check_for_data_loaded():
+    container = this
+    if load_status.loading or conversion_data_load_status.loading:
+        conditional_timeout(container.id, 5, check_for_data_loaded)
+        return
+    container = container.lastChild
+    clear(container)
+    if not load_status.ok:
+        report_load_failure(container)
+        return
+    if not conversion_data_load_status.ok:
+        report_a_load_failure(
+            container, _('Failed to load conversion data from calibre, with error:'),
+        conversion_data_load_status.error_html)
+    # create_convert_book(container)
+
+
+def init(container_id):
+    container = document.getElementById(container_id)
+    create_top_bar(container, title=_('Convert book'), action=on_close.bind(None, container_id), icon='close')
+    container.appendChild(E.div(class_=CLASS_NAME))
+    container.lastChild.appendChild(E.div(_('Loading conversion data, please wait...'), style='margin: 1ex 1em'))
+    conditional_timeout(container_id, 5, check_for_data_loaded)
+    q = parse_url_params()
+    fetch_conversion_data(q.book_id)
+
+
+set_panel_handler('convert_book', init)

src/pyj/book_list/router.pyj

@@ -2,11 +2,17 @@
 # License: GPL v3 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
 from __python__ import bound_methods, hash_literals
 
+from elementmaker import E
+from gettext import gettext as _
+
 from book_list.constants import book_list_container_id, read_book_container_id
 from book_list.globals import get_current_query
 from book_list.library_data import current_library_id
 from modals import close_all_modals
-from utils import encode_query_with_path, parse_url_params, request_full_screen
+from utils import (
+    encode_query_with_path, parse_url_params, request_full_screen,
+    safe_set_inner_html
+)
 
 mode_handlers = {}
 default_mode_handler = None
@@ -89,5 +95,20 @@ def back():
             q = {}
         push_state(q, replace=True)
 
+
 def home(replace=False):
     push_state({})
+
+
+def report_a_load_failure(container, msg, error_html):
+    err = E.div()
+    safe_set_inner_html(err, error_html)
+    container.appendChild(E.div(
+        style='margin: 1ex 1em',
+        E.div(msg),
+        err,
+        E.div(
+            style='margin-top: 1em; border-top: solid 1px currentColor; padding-top: 1ex;',
+            E.a(onclick=def(): home(replace=True);, href='javascript: void(0)', style='color: blue', _('Go back to the home page')))
+        ),
+    )