mirror of https://github.com/koreader/koreader
Migrate history folder, FileManagerHistory uses own history.lua file and ReadHistory component
Zijie He
8 years ago
committed by
Hzj_jie
parent
2dbfcdf207
commit
667e8834ad
@ -0,0 +1,112 @@
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local lfs = require("libs/libkoreader-lfs")
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local DataStorage = require("datastorage")
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local DocSettings = require("docsettings")
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local joinPath = require("ffi/util").joinPath
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local dump = require("dump")
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local history_file = joinPath(DataStorage:getDataDir(), "history.lua")
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local ReadHistory = {
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hist = {},
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}
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local function buildEntry(input_time, input_file)
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return {
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time = input_time,
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text = input_file:gsub(".*/", ""),
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file = input_file,
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callback = function()
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local ReaderUI = require("apps/reader/readerui")
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ReaderUI:showReader(input_file)
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end
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}
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end
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function ReadHistory:_sort()
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table.sort(self.hist, function(l, r) return l.file < r.file end)
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-- TODO(zijiehe): Use binary insert instead of a loop to deduplicate.
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for i = #self.hist, 2, -1 do
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if self.hist[i].file == self.hist[i - 1].file then
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table.remove(self.hist, i)
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end
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end
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table.sort(self.hist, function(v1, v2) return v1.time > v2.time end)
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-- TODO(zijiehe): Use binary search to find an item when deleting it.
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for i = 1, #self.hist, 1 do
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self.hist[i].index = i
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end
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end
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-- Reduces total count in hist list to a reasonable number by removing last
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-- several items.
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function ReadHistory:_reduce()
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while #self.hist > 500 do
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table.remove(self.hist, #self.hist)
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end
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end
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-- Flushes current history table into file.
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function ReadHistory:_flush()
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local content = {}
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for k, v in pairs(self.hist) do
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content[k] = {
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time = v.time,
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file = v.file
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}
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end
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local f = io.open(history_file, "w")
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f:write("return " .. dump(content) .. "\n")
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f:close()
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end
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-- Reads history table from file
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function ReadHistory:_read()
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local ok, data = pcall(dofile, history_file)
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if ok then
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for k, v in pairs(data) do
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table.insert(self.hist, buildEntry(v.time, v.file))
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end
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end
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end
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-- Reads history from legacy history folder
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function ReadHistory:_readLegacyHistory()
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local history_dir = DataStorage:getHistoryDir()
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for f in lfs.dir(history_dir) do
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local path = joinPath(history_dir, f)
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if lfs.attributes(path, "mode") == "file" then
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local file = joinPath(DocSettings:getPathFromHistory(f),
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DocSettings:getNameFromHistory(f))
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table.insert(self.hist,
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buildEntry(lfs.attributes(path, "modification"), file))
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end
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end
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end
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function ReadHistory:_init()
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self:_read()
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self:_readLegacyHistory()
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self:_sort()
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self:_reduce()
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end
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function ReadHistory:removeItem(item)
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table.remove(self.hist, item.index)
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os.remove(DocSettings:getHistoryPath(item.file))
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self:_flush()
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end
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function ReadHistory:addItem(file)
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if file ~= nil and lfs.attributes(file, "mode") == "file" then
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table.insert(self.hist, 1, buildEntry(os.time(), file))
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-- TODO(zijiehe): We do not need to sort if we can use binary insert and
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-- binary search.
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self:_sort()
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self:_reduce()
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self:_flush()
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end
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end
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ReadHistory:_init()
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return ReadHistory
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