DocSettings/Purge .sdr: reword, don't purge other books (#8348)

Reword "Purge .sdr" to "Reset settings".
When purging, remove only the known document metadata
files, and not those for a document with the same name but
a different suffix.

frontend/apps/filemanager/filemanager.lua

@@ -249,12 +249,12 @@ function FileManager:setupLayout()
                     end,
                 },
                 {
-                    text = _("Purge .sdr"),
+                    text = _("Reset settings"),
-                    enabled = DocSettings:hasSidecarFile(BaseUtil.realpath(file)),
+                    enabled = is_file and DocSettings:hasSidecarFile(BaseUtil.realpath(file)),
                     callback = function()
                         UIManager:show(ConfirmBox:new{
-                            text = T(_("Purge .sdr to reset settings for this document?\n\n%1"), BD.filename(self.file_dialog.title)),
+                            text = T(_("Reset settings for this document?\n\n%1\n\nAny highlights or bookmarks will be permanently lost."), BD.filepath(file)),
-                            ok_text = _("Purge"),
+                            ok_text = _("Reset"),
                             ok_callback = function()
                                 filemanagerutil.purgeSettings(file)
                                 require("readhistory"):fileSettingsPurged(file)
@@ -280,8 +280,8 @@ function FileManager:setupLayout()
                     callback = function()
                         UIManager:close(self.file_dialog)
                         UIManager:show(ConfirmBox:new{
-                            text = is_file and T(_("Delete file?\n%1\nIf you delete a file, it is permanently lost."), BD.filepath(file)) or
+                            text = is_file and T(_("Delete file?\n\n%1\n\nIf you delete a file, it is permanently lost."), BD.filepath(file)) or
-                                T(_("Delete folder?\n%1\nIf you delete a folder, its content is permanently lost."), BD.filepath(file)),
+                                T(_("Delete folder?\n\n%1\n\nIf you delete a folder, its content is permanently lost."), BD.filepath(file)),
                             ok_text = _("Delete"),
                             ok_callback = function()
                                 deleteFile(file)

frontend/apps/filemanager/filemanagerhistory.lua

@@ -10,6 +10,7 @@ local Screen = require("device").screen
 local filemanagerutil = require("apps/filemanager/filemanagerutil")
 local util = require("ffi/util")
 local _ = require("gettext")
+local T = util.template
 
 local FileManagerHistory = InputContainer:extend{
     hist_menu_title = _("History"),
@@ -50,12 +51,12 @@ function FileManagerHistory:onMenuHold(item)
     local buttons = {
         {
             {
-                text = _("Purge .sdr"),
+                text = _("Reset settings"),
                 enabled = item.file ~= currently_opened_file and DocSettings:hasSidecarFile(util.realpath(item.file)),
                 callback = function()
                     UIManager:show(ConfirmBox:new{
-                        text = util.template(_("Purge .sdr to reset settings for this document?\n\n%1"), BD.filename(item.text)),
+                        text = T(_("Reset settings for this document?\n\n%1\n\nAny highlights or bookmarks will be permanently lost."), BD.filepath(item.file)),
-                        ok_text = _("Purge"),
+                        ok_text = _("Reset"),
                         ok_callback = function()
                             filemanagerutil.purgeSettings(item.file)
                             require("readhistory"):fileSettingsPurged(item.file)
@@ -80,7 +81,7 @@ function FileManagerHistory:onMenuHold(item)
                 enabled = (item.file ~= currently_opened_file and lfs.attributes(item.file, "mode")) and true or false,
                 callback = function()
                     UIManager:show(ConfirmBox:new{
-                        text = _("Are you sure that you want to delete this file?\n") .. BD.filepath(item.file) .. ("\n") .. _("If you delete a file, it is permanently lost."),
+                        text = T(_("Are you sure that you want to delete this document?\n\n%1\n\nIf you delete a file, it is permanently lost."), BD.filepath(item.file)),
                         ok_text = _("Delete"),
                         ok_callback = function()
                             local FileManager = require("apps/filemanager/filemanager")

frontend/apps/filemanager/filemanagerutil.lua

@@ -33,13 +33,7 @@ end
 function filemanagerutil.purgeSettings(file)
     local file_abs_path = util.realpath(file)
     if file_abs_path then
-        os.remove(DocSettings:getSidecarFile(file_abs_path))
+        DocSettings:open(file_abs_path):purge()
-        -- Also remove backup, otherwise it will be used if we re-open this document
-        -- (it also allows for the sidecar folder to be empty and removed)
-        os.remove(DocSettings:getSidecarFile(file_abs_path)..".old")
-        -- If the sidecar folder is empty, os.remove() can delete it.
-        -- Otherwise, the following statement has no effect.
-        os.remove(DocSettings:getSidecarDir(file_abs_path))
     end
 end
 

frontend/docsettings.lua

@@ -9,6 +9,7 @@ local dump = require("dump")
 local ffiutil = require("ffi/util")
 local lfs = require("libs/libkoreader-lfs")
 local logger = require("logger")
+local util = require("util")
 
 local DocSettings = {}
 
@@ -140,7 +141,7 @@ function DocSettings:open(docfile)
                                end
                            end)
     local ok, stored, filepath
-    for _, k in pairs(candidates) do
+    for _, k in ipairs(candidates) do
         -- Ignore empty files
         if lfs.attributes(k[1], "size") > 0 then
             ok, stored = pcall(dofile, k[1])
@@ -312,7 +313,7 @@ function DocSettings:flush()
     self:ensureSidecar(self.sidecar)
     local s_out = dump(self.data)
     os.setlocale('C', 'numeric')
-    for _, f in pairs(serials) do
+    for _, f in ipairs(serials) do
         local directory_updated = false
         if lfs.attributes(f, "mode") == "file" then
             -- As an additional safety measure (to the ffiutil.fsync* calls
@@ -338,7 +339,7 @@ function DocSettings:flush()
 
             if self.candidates ~= nil
             and G_reader_settings:nilOrFalse("preserve_legacy_docsetting") then
-                for _, k in pairs(self.candidates) do
+                for _, k in ipairs(self.candidates) do
                     if k[1] ~= f and k[1] ~= f .. ".old" then
                         logger.dbg("Remove legacy file ", k[1])
                         os.remove(k[1])
@@ -366,12 +367,51 @@ function DocSettings:getFilePath()
 end
 
 --- Purges (removes) sidecar directory.
-function DocSettings:purge()
+function DocSettings:purge(full)
+    -- Remove any of the old ones we may consider as candidates
+    -- in DocSettings:open()
     if self.history_file then
         os.remove(self.history_file)
+        os.remove(self.history_file .. ".old")
+    end
+    if self.legacy_sidecar_file then
+        os.remove(self.legacy_sidecar_file)
     end
     if lfs.attributes(self.sidecar, "mode") == "directory" then
-        ffiutil.purgeDir(self.sidecar)
+        if full then
+            -- Asked to remove all the content of this .sdr directory,
+            -- whether it's ours or not
+            ffiutil.purgeDir(self.sidecar)
+        else
+            -- Only remove the files we know we may have created
+            -- with our usual names.
+            for f in lfs.dir(self.sidecar) do
+                local fullpath = self.sidecar.."/"..f
+                local to_remove = false
+                if lfs.attributes(fullpath, "mode") == "file" then
+                    -- Currently, we only create a single file in there,
+                    -- named metadata.suffix.lua (ie. metadata.epub.lua),
+                    -- with possibly backups named metadata.epub.lua.old and
+                    -- metadata.epub.lua.old_dom20180528, so all sharing the
+                    -- same base: self.sidecar_file
+                    if util.stringStartsWith(fullpath, self.sidecar_file) then
+                        to_remove = true
+                    end
+                end
+                if to_remove then
+                    os.remove(fullpath)
+                    logger.dbg("purge: removed ", fullpath)
+                end
+            end
+            -- If the sidecar folder ends up empty, os.remove() can delete it.
+            -- Otherwise, the following statement has no effect.
+            os.remove(self.sidecar)
+        end
+    end
+    -- We should have meet the candidate we used and remove it above. But in
+    -- case we didn't, remove it
+    if self.filepath and lfs.attributes(self.filepath, "mode") == "file" then
+        os.remove(self.filepath)
     end
     self.data = {}
 end

plugins/coverbrowser.koplugin/covermenu.lua

@@ -243,7 +243,7 @@ function CoverMenu:updateItems(select_number)
                     UIManager:close(self.file_dialog)
                 end
 
-                -- Fudge the "Purge .sdr" button ([1][3]) callback to also trash the cover_info_cache
+                -- Fudge the "Reset settings" button ([1][3]) callback to also trash the cover_info_cache
                 local orig_purge_callback = orig_buttons[1][3].callback
                 orig_buttons[1][3].callback = function()
                     -- Wipe the cache