From 64f699ba369db70c2fd6fb12ab2f494df56f6317 Mon Sep 17 00:00:00 2001
From: poire-z <poire-z@users.noreply.github.com>
Date: Sat, 1 Jul 2017 11:41:27 +0200
Subject: [PATCH] Store book metadata and nb of pages in new settings

They may already be available (with other statistics stuff) under
the 'stats' key, but not if Statistics plugin is disabled. As this
plugin may be migrated to SQLite, readerui and readerfooter will now
set two new properties: doc_props (containing all and only the metadata
returned by document:getDocumentProps()) and doc_pages (updated
by readerfooter on any display or font change).

PDF document: returns additional PDF properties: Keywords
and Subject (as Description).
---
 frontend/apps/reader/modules/readerfooter.lua |  1 +
 frontend/apps/reader/readerui.lua             | 10 ++++++++++
 frontend/document/pdfdocument.lua             |  2 ++
 3 files changed, 13 insertions(+)

diff --git a/frontend/apps/reader/modules/readerfooter.lua b/frontend/apps/reader/modules/readerfooter.lua
index d8196afcc..fa090837e 100644
--- a/frontend/apps/reader/modules/readerfooter.lua
+++ b/frontend/apps/reader/modules/readerfooter.lua
@@ -546,6 +546,7 @@ end
 function ReaderFooter:onPageUpdate(pageno)
     self.pageno = pageno
     self.pages = self.view.document:getPageCount()
+    self.ui.doc_settings:saveSetting("doc_pages", self.pages) -- for Book information
     self:updateFooterPage()
 end
 
diff --git a/frontend/apps/reader/readerui.lua b/frontend/apps/reader/readerui.lua
index 9eb5b532d..8c0f57c44 100644
--- a/frontend/apps/reader/readerui.lua
+++ b/frontend/apps/reader/readerui.lua
@@ -342,6 +342,16 @@ function ReaderUI:init()
     end
     self.postInitCallback = nil
 
+    -- Now that document is loaded, store book metadata in settings
+    -- (so that filemanager can use it from sideCar file to display
+    -- Book information).
+    -- via pcall because picdocument:getProps() may fail
+    local ok, doc_props = pcall(self.document.getProps, self.document)
+    if not ok then
+        doc_props = {}
+    end
+    self.doc_settings:saveSetting("doc_props", doc_props)
+
     -- After initialisation notify that document is loaded and rendered
     -- CREngine only reports correct page count after rendering is done
     -- Need the same event for PDF document
diff --git a/frontend/document/pdfdocument.lua b/frontend/document/pdfdocument.lua
index 993f6f123..112bbf7a9 100644
--- a/frontend/document/pdfdocument.lua
+++ b/frontend/document/pdfdocument.lua
@@ -174,6 +174,8 @@ function PdfDocument:getProps()
     props.authors = props.author
     props.series = ""
     props.language = ""
+    props.keywords = props.keywords
+    props.description = props.subject
     return props
 end