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3291cc232ec1e6cb1ffa8c47b1c71ab7f9614911
[etc/awesome.git] / widgets / contrib / tpbat / smapi.lua
1 --[[
2      smapi.lua
3      Interface with thinkpad battery information
4
5      Licensed under GNU General Public License v2 
6       * (c) 2013,      Conor Heine           
7                                                   
8 --]]
9
10 local first_line   = require("lain.helpers").first_line
11
12 local string       = { format = string.format }
13 local tonumber     = tonumber
14 local setmetatable = setmetatable
15
16 local smapi = {}
17
18 local apipath = "/sys/devices/platform/smapi"
19
20 -- Most are readable values, but some can be written to (not implemented, yet?)
21 local readable = {
22     barcoding = true,
23     charging_max_current = true,
24     charging_max_voltage = true,
25     chemistry = true,
26     current_avg = true,
27     current_now = true,
28     cycle_count = true,
29     design_capacity = true,
30     design_voltage = true,
31     dump = true,
32     first_use_date = true,
33     force_discharge = false,
34     group0_voltage = true,
35     group1_voltage = true,
36     group2_voltage = true,
37     group3_voltage = true,
38     inhibit_charge_minutes = false,
39     installed = true,
40     last_full_capacity = true,
41     manufacture_date = true,
42     manufacturer = true,
43     model = true,
44     power_avg = true,
45     power_now = true,
46     remaining_capacity = true,
47     remaining_charging_time = true,
48     remaining_percent = true,
49     remaining_percent_error = true,
50     remaining_running_time = true,
51     remaining_running_time_now = true,
52     serial = true,
53     start_charge_thresh = false,
54     state = true,
55     stop_charge_thresh = false,
56     temperature = true,
57     voltage = true,
58 }
59
60 function smapi:battery(name)
61     local bat = {}
62
63     bat.name = name
64     bat.path = apipath .. "/" .. name
65     
66     function bat:get(item)
67         return self.path ~= nil and readable[item] and first_line(self.path .. "/" .. item) or nil
68     end
69
70     function bat:installed()
71         return self:get("installed") == "1"
72     end
73
74     function bat:status()
75         return self:get('state')
76     end
77
78     -- Remaining time can either be time until battery dies or time until charging completes
79     function bat:remaining_time()
80         local time_val = bat_now.status == 'discharging' and 'remaining_running_time' or 'remaining_charging_time'
81         local mins_left = self:get(time_val)
82
83         if mins_left:find("^%d+") == nil then
84             return "N/A"
85         end
86         
87         local hrs = mins_left / 60
88         local min = mins_left % 60
89         return string.format("%02d:%02d", hrs, min)
90     end
91
92     function bat:percent()
93         return tonumber(self:get("remaining_percent"))
94     end
95
96     return setmetatable(bat, {__metatable = false, __newindex = false})
97 end
98
99 return smapi