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koreader/frontend/ui/plugin/background_task_plugin.lua

39 lines
1010 B
Lua

--[[--
BackgroundTaskPlugin creates a plugin with a switch to enable or disable it and executes a
background task.
See spec/unit/background_task_plugin_spec.lua for the usage.
]]
local PluginShare = require("pluginshare")
local SwitchPlugin = require("ui/plugin/switch_plugin")
local BackgroundTaskPlugin = SwitchPlugin:extend()
function BackgroundTaskPlugin:_schedule(settings_id)
local enabled = function()
if not self.enabled then
return false
end
if settings_id ~= self.settings_id then
return false
end
return true
end
table.insert(PluginShare.backgroundJobs, {
when = self.when,
repeated = enabled,
executable = self.executable,
})
local Event = require("ui/event")
local UIManager = require("ui/uimanager")
UIManager:broadcastEvent(Event:new("BackgroundJobsUpdated"))
end
function BackgroundTaskPlugin:_start()
self:_schedule(self.settings_id)
end
return BackgroundTaskPlugin