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Diffstat (limited to 'rbot/utils.rb')
| -rw-r--r-- | rbot/utils.rb | 778 |
1 files changed, 778 insertions, 0 deletions
diff --git a/rbot/utils.rb b/rbot/utils.rb new file mode 100644 index 00000000..516fb4dc --- /dev/null +++ b/rbot/utils.rb @@ -0,0 +1,778 @@ +require 'net/http' +require 'uri' + +module Irc + + # miscellaneous useful functions + module Utils + # read a time in string format, turn it into "seconds from now". + # example formats handled are "5 minutes", "2 days", "five hours", + # "11:30", "15:45:11", "one day", etc. + # + # Throws:: RunTimeError "invalid time string" on parse failure + def Utils.timestr_offset(timestr) + case timestr + when (/^(\S+)\s+(\S+)$/) + mult = $1 + unit = $2 + if(mult =~ /^([\d.]+)$/) + num = $1.to_f + raise "invalid time string" unless num + else + case mult + when(/^(one|an|a)$/) + num = 1 + when(/^two$/) + num = 2 + when(/^three$/) + num = 3 + when(/^four$/) + num = 4 + when(/^five$/) + num = 5 + when(/^six$/) + num = 6 + when(/^seven$/) + num = 7 + when(/^eight$/) + num = 8 + when(/^nine$/) + num = 9 + when(/^ten$/) + num = 10 + when(/^fifteen$/) + num = 15 + when(/^twenty$/) + num = 20 + when(/^thirty$/) + num = 30 + when(/^sixty$/) + num = 60 + else + raise "invalid time string" + end + end + case unit + when (/^(s|sec(ond)?s?)$/) + return num + when (/^(m|min(ute)?s?)$/) + return num * 60 + when (/^(h|h(ou)?rs?)$/) + return num * 60 * 60 + when (/^(d|days?)$/) + return num * 60 * 60 * 24 + else + raise "invalid time string" + end + when (/^(\d+):(\d+):(\d+)$/) + hour = $1.to_i + min = $2.to_i + sec = $3.to_i + now = Time.now + later = Time.mktime(now.year, now.month, now.day, hour, min, sec) + return later - now + when (/^(\d+):(\d+)$/) + hour = $1.to_i + min = $2.to_i + now = Time.now + later = Time.mktime(now.year, now.month, now.day, hour, min, now.sec) + return later - now + when (/^(\d+):(\d+)(am|pm)$/) + hour = $1.to_i + min = $2.to_i + ampm = $3 + if ampm == "pm" + hour += 12 + end + now = Time.now + later = Time.mktime(now.year, now.month, now.day, hour, min, now.sec) + return later - now + when (/^(\S+)$/) + num = 1 + unit = $1 + case unit + when (/^(s|sec(ond)?s?)$/) + return num + when (/^(m|min(ute)?s?)$/) + return num * 60 + when (/^(h|h(ou)?rs?)$/) + return num * 60 * 60 + when (/^(d|days?)$/) + return num * 60 * 60 * 24 + else + raise "invalid time string" + end + else + raise "invalid time string" + end + end + + # turn a number of seconds into a human readable string, e.g + # 2 days, 3 hours, 18 minutes, 10 seconds + def Utils.secs_to_string(secs) + ret = "" + days = (secs / (60 * 60 * 24)).to_i + secs = secs % (60 * 60 * 24) + hours = (secs / (60 * 60)).to_i + secs = (secs % (60 * 60)) + mins = (secs / 60).to_i + secs = (secs % 60).to_i + ret += "#{days} days, " if days > 0 + ret += "#{hours} hours, " if hours > 0 || days > 0 + ret += "#{mins} minutes and " if mins > 0 || hours > 0 || days > 0 + ret += "#{secs} seconds" + return ret + end + + def Utils.safe_exec(command, *args) + IO.popen("-") {|p| + if(p) + return p.readlines.join("\n") + else + begin + $stderr = $stdout + exec(command, *args) + rescue Exception => e + puts "exec of #{command} led to exception: #{e}" + Kernel::exit! 0 + end + puts "exec of #{command} failed" + Kernel::exit! 0 + end + } + end + + # returns a string containing the result of an HTTP GET on the uri + def Utils.http_get(uristr, readtimeout=8, opentimeout=4) + + # ruby 1.7 or better needed for this (or 1.6 and debian unstable) + Net::HTTP.version_1_2 + # (so we support the 1_1 api anyway, avoids problems) + + uri = URI.parse uristr + query = uri.path + if uri.query + query += "?#{uri.query}" + end + + proxy_host = nil + proxy_port = nil + if(ENV['http_proxy'] && proxy_uri = URI.parse(ENV['http_proxy'])) + proxy_host = proxy_uri.host + proxy_port = proxy_uri.port + end + + http = Net::HTTP.new(uri.host, uri.port, proxy_host, proxy_port) + http.open_timeout = opentimeout + http.read_timeout = readtimeout + + http.start {|http| + begin + resp = http.get(query) + if resp.code == "200" + return resp.body + end + rescue => e + # cheesy for now + $stderr.puts "Utils.http_get exception: #{e}, while trying to get #{uristr}" + return nil + end + } + end + + # This is nasty-ass. I hate writing parsers. + class Metar + attr_reader :decoded + attr_reader :input + attr_reader :date + attr_reader :nodata + def initialize(string) + str = nil + @nodata = false + string.each_line {|l| + if str == nil + # grab first line (date) + @date = l.chomp.strip + str = "" + else + if(str == "") + str = l.chomp.strip + else + str += " " + l.chomp.strip + end + end + } + if @date && @date =~ /^(\d+)\/(\d+)\/(\d+) (\d+):(\d+)$/ + # 2002/02/26 05:00 + @date = Time.gm($1, $2, $3, $4, $5, 0) + else + @date = Time.now + end + @input = str.chomp + @cloud_layers = 0 + @cloud_coverage = { + 'SKC' => '0', + 'CLR' => '0', + 'VV' => '8/8', + 'FEW' => '1/8 - 2/8', + 'SCT' => '3/8 - 4/8', + 'BKN' => '5/8 - 7/8', + 'OVC' => '8/8' + } + @wind_dir_texts = [ + 'North', + 'North/Northeast', + 'Northeast', + 'East/Northeast', + 'East', + 'East/Southeast', + 'Southeast', + 'South/Southeast', + 'South', + 'South/Southwest', + 'Southwest', + 'West/Southwest', + 'West', + 'West/Northwest', + 'Northwest', + 'North/Northwest', + 'North' + ] + @wind_dir_texts_short = [ + 'N', + 'N/NE', + 'NE', + 'E/NE', + 'E', + 'E/SE', + 'SE', + 'S/SE', + 'S', + 'S/SW', + 'SW', + 'W/SW', + 'W', + 'W/NW', + 'NW', + 'N/NW', + 'N' + ] + @weather_array = { + 'MI' => 'Mild ', + 'PR' => 'Partial ', + 'BC' => 'Patches ', + 'DR' => 'Low Drifting ', + 'BL' => 'Blowing ', + 'SH' => 'Shower(s) ', + 'TS' => 'Thunderstorm ', + 'FZ' => 'Freezing', + 'DZ' => 'Drizzle ', + 'RA' => 'Rain ', + 'SN' => 'Snow ', + 'SG' => 'Snow Grains ', + 'IC' => 'Ice Crystals ', + 'PE' => 'Ice Pellets ', + 'GR' => 'Hail ', + 'GS' => 'Small Hail and/or Snow Pellets ', + 'UP' => 'Unknown ', + 'BR' => 'Mist ', + 'FG' => 'Fog ', + 'FU' => 'Smoke ', + 'VA' => 'Volcanic Ash ', + 'DU' => 'Widespread Dust ', + 'SA' => 'Sand ', + 'HZ' => 'Haze ', + 'PY' => 'Spray', + 'PO' => 'Well-Developed Dust/Sand Whirls ', + 'SQ' => 'Squalls ', + 'FC' => 'Funnel Cloud Tornado Waterspout ', + 'SS' => 'Sandstorm/Duststorm ' + } + @cloud_condition_array = { + 'SKC' => 'clear', + 'CLR' => 'clear', + 'VV' => 'vertical visibility', + 'FEW' => 'a few', + 'SCT' => 'scattered', + 'BKN' => 'broken', + 'OVC' => 'overcast' + } + @strings = { + 'mm_inches' => '%s mm (%s inches)', + 'precip_a_trace' => 'a trace', + 'precip_there_was' => 'There was %s of precipitation ', + 'sky_str_format1' => 'There were %s at a height of %s meters (%s feet)', + 'sky_str_clear' => 'The sky was clear', + 'sky_str_format2' => ', %s at a height of %s meter (%s feet) and %s at a height of %s meters (%s feet)', + 'sky_str_format3' => ' and %s at a height of %s meters (%s feet)', + 'clouds' => ' clouds', + 'clouds_cb' => ' cumulonimbus clouds', + 'clouds_tcu' => ' towering cumulus clouds', + 'visibility_format' => 'The visibility was %s kilometers (%s miles).', + 'wind_str_format1' => 'blowing at a speed of %s meters per second (%s miles per hour)', + 'wind_str_format2' => ', with gusts to %s meters per second (%s miles per hour),', + 'wind_str_format3' => ' from the %s', + 'wind_str_calm' => 'calm', + 'precip_last_hour' => 'in the last hour. ', + 'precip_last_6_hours' => 'in the last 3 to 6 hours. ', + 'precip_last_24_hours' => 'in the last 24 hours. ', + 'precip_snow' => 'There is %s mm (%s inches) of snow on the ground. ', + 'temp_min_max_6_hours' => 'The maximum and minimum temperatures over the last 6 hours were %s and %s degrees Celsius (%s and %s degrees Fahrenheit).', + 'temp_max_6_hours' => 'The maximum temperature over the last 6 hours was %s degrees Celsius (%s degrees Fahrenheit). ', + 'temp_min_6_hours' => 'The minimum temperature over the last 6 hours was %s degrees Celsius (%s degrees Fahrenheit). ', + 'temp_min_max_24_hours' => 'The maximum and minimum temperatures over the last 24 hours were %s and %s degrees Celsius (%s and %s degrees Fahrenheit). ', + 'light' => 'Light ', + 'moderate' => 'Moderate ', + 'heavy' => 'Heavy ', + 'mild' => 'Mild ', + 'nearby' => 'Nearby ', + 'current_weather' => 'Current weather is %s. ', + 'pretty_print_metar' => '%s on %s, the wind was %s at %s. The temperature was %s degrees Celsius (%s degrees Fahrenheit), and the pressure was %s hPa (%s inHg). The relative humidity was %s%%. %s %s %s %s %s' + } + + parse + end + + def store_speed(value, windunit, meterspersec, knots, milesperhour) + # Helper function to convert and store speed based on unit. + # &$meterspersec, &$knots and &$milesperhour are passed on + # reference + if (windunit == 'KT') + # The windspeed measured in knots: + @decoded[knots] = sprintf("%.2f", value) + # The windspeed measured in meters per second, rounded to one decimal place: + @decoded[meterspersec] = sprintf("%.2f", value.to_f * 0.51444) + # The windspeed measured in miles per hour, rounded to one decimal place: */ + @decoded[milesperhour] = sprintf("%.2f", value.to_f * 1.1507695060844667) + elsif (windunit == 'MPS') + # The windspeed measured in meters per second: + @decoded[meterspersec] = sprintf("%.2f", value) + # The windspeed measured in knots, rounded to one decimal place: + @decoded[knots] = sprintf("%.2f", value.to_f / 0.51444) + #The windspeed measured in miles per hour, rounded to one decimal place: + @decoded[milesperhour] = sprintf("%.1f", value.to_f / 0.51444 * 1.1507695060844667) + elsif (windunit == 'KMH') + # The windspeed measured in kilometers per hour: + @decoded[meterspersec] = sprintf("%.1f", value.to_f * 1000 / 3600) + @decoded[knots] = sprintf("%.1f", value.to_f * 1000 / 3600 / 0.51444) + # The windspeed measured in miles per hour, rounded to one decimal place: + @decoded[milesperhour] = sprintf("%.1f", knots.to_f * 1.1507695060844667) + end + end + + def parse + @decoded = Hash.new + puts @input + @input.split(" ").each {|part| + if (part == 'METAR') + # Type of Report: METAR + @decoded['type'] = 'METAR' + elsif (part == 'SPECI') + # Type of Report: SPECI + @decoded['type'] = 'SPECI' + elsif (part == 'AUTO') + # Report Modifier: AUTO + @decoded['report_mod'] = 'AUTO' + elsif (part == 'NIL') + @nodata = true + elsif (part =~ /^\S{4}$/ && ! (@decoded.has_key?('station'))) + # Station Identifier + @decoded['station'] = part + elsif (part =~ /([0-9]{2})([0-9]{2})([0-9]{2})Z/) + # ignore this bit, it's useless without month/year. some of these + # things are hideously out of date. + # now = Time.new + # time = Time.gm(now.year, now.month, $1, $2, $3, 0) + # Date and Time of Report + # @decoded['time'] = time + elsif (part == 'COR') + # Report Modifier: COR + @decoded['report_mod'] = 'COR' + elsif (part =~ /([0-9]{3}|VRB)([0-9]{2,3}).*(KT|MPS|KMH)/) + # Wind Group + windunit = $3 + # now do ereg to get the actual values + part =~ /([0-9]{3}|VRB)([0-9]{2,3})((G[0-9]{2,3})?#{windunit})/ + if ($1 == 'VRB') + @decoded['wind_deg'] = 'variable directions' + @decoded['wind_dir_text'] = 'variable directions' + @decoded['wind_dir_text_short'] = 'VAR' + else + @decoded['wind_deg'] = $1 + @decoded['wind_dir_text'] = @wind_dir_texts[($1.to_i/22.5).round] + @decoded['wind_dir_text_short'] = @wind_dir_texts_short[($1.to_i/22.5).round] + end + store_speed($2, windunit, + 'wind_meters_per_second', + 'wind_knots', + 'wind_miles_per_hour') + + if ($4 != nil) + # We have a report with information about the gust. + # First we have the gust measured in knots + if ($4 =~ /G([0-9]{2,3})/) + store_speed($1,windunit, + 'wind_gust_meters_per_second', + 'wind_gust_knots', + 'wind_gust_miles_per_hour') + end + end + elsif (part =~ /([0-9]{3})V([0-9]{3})/) + # Variable wind-direction + @decoded['wind_var_beg'] = $1 + @decoded['wind_var_end'] = $2 + elsif (part == "9999") + # A strange value. When you look at other pages you see it + # interpreted like this (where I use > to signify 'Greater + # than'): + @decoded['visibility_miles'] = '>7'; + @decoded['visibility_km'] = '>11.3'; + elsif (part =~ /^([0-9]{4})$/) + # Visibility in meters (4 digits only) + # The visibility measured in kilometers, rounded to one decimal place. + @decoded['visibility_km'] = sprintf("%.1f", $1.to_i / 1000) + # The visibility measured in miles, rounded to one decimal place. + @decoded['visibility_miles'] = sprintf("%.1f", $1.to_i / 1000 / 1.609344) + elsif (part =~ /^[0-9]$/) + # Temp Visibility Group, single digit followed by space + @decoded['temp_visibility_miles'] = part + elsif (@decoded['temp_visibility_miles'] && (@decoded['temp_visibility_miles']+' '+part) =~ /^M?(([0-9]?)[ ]?([0-9])(\/?)([0-9]*))SM$/) + # Visibility Group + if ($4 == '/') + vis_miles = $2.to_i + $3.to_i/$5.to_i + else + vis_miles = $1.to_i; + end + if (@decoded['temp_visibility_miles'][0] == 'M') + # The visibility measured in miles, prefixed with < to indicate 'Less than' + @decoded['visibility_miles'] = '<' + sprintf("%.1f", vis_miles) + # The visibility measured in kilometers. The value is rounded + # to one decimal place, prefixed with < to indicate 'Less than' */ + @decoded['visibility_km'] = '<' . sprintf("%.1f", vis_miles * 1.609344) + else + # The visibility measured in mile.s */ + @decoded['visibility_miles'] = sprintf("%.1f", vis_miles) + # The visibility measured in kilometers, rounded to one decimal place. + @decoded['visibility_km'] = sprintf("%.1f", vis_miles * 1.609344) + end + elsif (part =~ /^(-|\+|VC|MI)?(TS|SH|FZ|BL|DR|BC|PR|RA|DZ|SN|SG|GR|GS|PE|IC|UP|BR|FG|FU|VA|DU|SA|HZ|PY|PO|SQ|FC|SS|DS)+$/) + # Current weather-group + @decoded['weather'] = '' unless @decoded.has_key?('weather') + if (part[0].chr == '-') + # A light phenomenon + @decoded['weather'] += @strings['light'] + part = part[1,part.length] + elsif (part[0].chr == '+') + # A heavy phenomenon + @decoded['weather'] += @strings['heavy'] + part = part[1,part.length] + elsif (part[0,2] == 'VC') + # Proximity Qualifier + @decoded['weather'] += @strings['nearby'] + part = part[2,part.length] + elsif (part[0,2] == 'MI') + @decoded['weather'] += @strings['mild'] + part = part[2,part.length] + else + # no intensity code => moderate phenomenon + @decoded['weather'] += @strings['moderate'] + end + + while (part && bite = part[0,2]) do + # Now we take the first two letters and determine what they + # mean. We append this to the variable so that we gradually + # build up a phrase. + + @decoded['weather'] += @weather_array[bite] + # Here we chop off the two first letters, so that we can take + # a new bite at top of the while-loop. + part = part[2,-1] + end + elsif (part =~ /(SKC|CLR)/) + # Cloud-layer-group. + # There can be up to three of these groups, so we store them as + # cloud_layer1, cloud_layer2 and cloud_layer3. + + @cloud_layers += 1; + # Again we have to translate the code-characters to a + # meaningful string. + @decoded['cloud_layer'+ (@cloud_layers.to_s) +'_condition'] = @cloud_condition_array[$1] + @decoded['cloud_layer'+ (@cloud_layers.to_s) +'_coverage'] = @cloud_coverage[$1] + elsif (part =~ /^(VV|FEW|SCT|BKN|OVC)([0-9]{3})(CB|TCU)?$/) + # We have found (another) a cloud-layer-group. There can be up + # to three of these groups, so we store them as cloud_layer1, + # cloud_layer2 and cloud_layer3. + @cloud_layers += 1; + # Again we have to translate the code-characters to a meaningful string. + if ($3 == 'CB') + # cumulonimbus (CB) clouds were observed. */ + @decoded['cloud_layer'+ (@cloud_layers.to_s) +'_condition'] = + @cloud_condition_array[$1] + @strings['clouds_cb'] + elsif ($3 == 'TCU') + # towering cumulus (TCU) clouds were observed. + @decoded['cloud_layer'+ (@cloud_layers.to_s) +'_condition'] = + @cloud_condition_array[$1] + @strings['clouds_tcu'] + else + @decoded['cloud_layer'+ (@cloud_layers.to_s) +'_condition'] = + @cloud_condition_array[$1] + @strings['clouds'] + end + @decoded['cloud_layer'+ (@cloud_layers.to_s) +'_coverage'] = @cloud_coverage[$1] + @decoded['cloud_layer'+ (@cloud_layers.to_s) +'_altitude_ft'] = $2.to_i * 100 + @decoded['cloud_layer'+ (@cloud_layers.to_s) +'_altitude_m'] = ($2.to_f * 30.48).round + elsif (part =~ /^T([0-9]{4})$/) + store_temp($1,'temp_c','temp_f') + elsif (part =~ /^T?(M?[0-9]{2})\/(M?[0-9\/]{1,2})?$/) + # Temperature/Dew Point Group + # The temperature and dew-point measured in Celsius. + @decoded['temp_c'] = sprintf("%d", $1.tr('M', '-')) + if $2 == "//" || !$2 + @decoded['dew_c'] = 0 + else + @decoded['dew_c'] = sprintf("%.1f", $2.tr('M', '-')) + end + # The temperature and dew-point measured in Fahrenheit, rounded to + # the nearest degree. + @decoded['temp_f'] = ((@decoded['temp_c'].to_f * 9 / 5) + 32).round + @decoded['dew_f'] = ((@decoded['dew_c'].to_f * 9 / 5) + 32).round + elsif(part =~ /A([0-9]{4})/) + # Altimeter + # The pressure measured in inHg + @decoded['altimeter_inhg'] = sprintf("%.2f", $1.to_i/100) + # The pressure measured in mmHg, hPa and atm + @decoded['altimeter_mmhg'] = sprintf("%.1f", $1.to_f * 0.254) + @decoded['altimeter_hpa'] = sprintf("%d", ($1.to_f * 0.33863881578947).to_i) + @decoded['altimeter_atm'] = sprintf("%.3f", $1.to_f * 3.3421052631579e-4) + elsif(part =~ /Q([0-9]{4})/) + # Altimeter + # This is strange, the specification doesnt say anything about + # the Qxxxx-form, but it's in the METARs. + # The pressure measured in hPa + @decoded['altimeter_hpa'] = sprintf("%d", $1.to_i) + # The pressure measured in mmHg, inHg and atm + @decoded['altimeter_mmhg'] = sprintf("%.1f", $1.to_f * 0.7500616827) + @decoded['altimeter_inhg'] = sprintf("%.2f", $1.to_f * 0.0295299875) + @decoded['altimeter_atm'] = sprintf("%.3f", $1.to_f * 9.869232667e-4) + elsif (part =~ /^T([0-9]{4})([0-9]{4})/) + # Temperature/Dew Point Group, coded to tenth of degree. + # The temperature and dew-point measured in Celsius. + store_temp($1,'temp_c','temp_f') + store_temp($2,'dew_c','dew_f') + elsif (part =~ /^1([0-9]{4}$)/) + # 6 hour maximum temperature Celsius, coded to tenth of degree + store_temp($1,'temp_max6h_c','temp_max6h_f') + elsif (part =~ /^2([0-9]{4}$)/) + # 6 hour minimum temperature Celsius, coded to tenth of degree + store_temp($1,'temp_min6h_c','temp_min6h_f') + elsif (part =~ /^4([0-9]{4})([0-9]{4})$/) + # 24 hour maximum and minimum temperature Celsius, coded to + # tenth of degree + store_temp($1,'temp_max24h_c','temp_max24h_f') + store_temp($2,'temp_min24h_c','temp_min24h_f') + elsif (part =~ /^P([0-9]{4})/) + # Precipitation during last hour in hundredths of an inch + # (store as inches) + @decoded['precip_in'] = sprintf("%.2f", $1.to_f/100) + @decoded['precip_mm'] = sprintf("%.2f", $1.to_f * 0.254) + elsif (part =~ /^6([0-9]{4})/) + # Precipitation during last 3 or 6 hours in hundredths of an + # inch (store as inches) + @decoded['precip_6h_in'] = sprintf("%.2f", $1.to_f/100) + @decoded['precip_6h_mm'] = sprintf("%.2f", $1.to_f * 0.254) + elsif (part =~ /^7([0-9]{4})/) + # Precipitation during last 24 hours in hundredths of an inch + # (store as inches) + @decoded['precip_24h_in'] = sprintf("%.2f", $1.to_f/100) + @decoded['precip_24h_mm'] = sprintf("%.2f", $1.to_f * 0.254) + elsif(part =~ /^4\/([0-9]{3})/) + # Snow depth in inches + @decoded['snow_in'] = sprintf("%.2f", $1); + @decoded['snow_mm'] = sprintf("%.2f", $1.to_f * 25.4) + else + # If we couldn't match the group, we assume that it was a + # remark. + @decoded['remarks'] = '' unless @decoded.has_key?("remarks") + @decoded['remarks'] += ' ' + part; + end + } + + # Relative humidity + # p @decoded['dew_c'] # 11.0 + # p @decoded['temp_c'] # 21.0 + # => 56.1 + @decoded['rel_humidity'] = sprintf("%.1f",100 * + (6.11 * (10.0**(7.5 * @decoded['dew_c'].to_f / (237.7 + @decoded['dew_c'].to_f)))) / (6.11 * (10.0 ** (7.5 * @decoded['temp_c'].to_f / (237.7 + @decoded['temp_c'].to_f))))) if @decoded.has_key?('dew_c') + end + + def store_temp(temp,temp_cname,temp_fname) + # Given a numerical temperature temp in Celsius, coded to tenth of + # degree, store in @decoded[temp_cname], convert to Fahrenheit + # and store in @decoded[temp_fname] + # Note: temp is converted to negative if temp > 100.0 (See + # Federal Meteorological Handbook for groups T, 1, 2 and 4) + + # Temperature measured in Celsius, coded to tenth of degree + temp = temp.to_f/10 + if (temp >100.0) + # first digit = 1 means minus temperature + temp = -(temp - 100.0) + end + @decoded[temp_cname] = sprintf("%.1f", temp) + # The temperature in Fahrenheit. + @decoded[temp_fname] = sprintf("%.1f", (temp * 9 / 5) + 32) + end + + def pretty_print_precip(precip_mm, precip_in) + # Returns amount if $precip_mm > 0, otherwise "trace" (see Federal + # Meteorological Handbook No. 1 for code groups P, 6 and 7) used in + # several places, so standardized in one function. + if (precip_mm.to_i > 0) + amount = sprintf(@strings['mm_inches'], precip_mm, precip_in) + else + amount = @strings['a_trace'] + end + return sprintf(@strings['precip_there_was'], amount) + end + + def pretty_print + if @nodata + return "The weather stored for #{@decoded['station']} consists of the string 'NIL' :(" + end + + ["temp_c", "altimeter_hpa"].each {|key| + if !@decoded.has_key?(key) + return "The weather stored for #{@decoded['station']} could not be parsed (#{@input})" + end + } + + mins_old = ((Time.now - @date.to_i).to_f/60).round + if (mins_old <= 60) + weather_age = mins_old.to_s + " minutes ago," + elsif (mins_old <= 60 * 25) + weather_age = (mins_old / 60).to_s + " hours, " + weather_age += (mins_old % 60).to_s + " minutes ago," + else + # return "The weather stored for #{@decoded['station']} is hideously out of date :( (Last update #{@date})" + weather_age = "The weather stored for #{@decoded['station']} is hideously out of date :( here it is anyway:" + end + + if(@decoded.has_key?("cloud_layer1_altitude_ft")) + sky_str = sprintf(@strings['sky_str_format1'], + @decoded["cloud_layer1_condition"], + @decoded["cloud_layer1_altitude_m"], + @decoded["cloud_layer1_altitude_ft"]) + else + sky_str = @strings['sky_str_clear'] + end + + if(@decoded.has_key?("cloud_layer2_altitude_ft")) + if(@decoded.has_key?("cloud_layer3_altitude_ft")) + sky_str += sprintf(@strings['sky_str_format2'], + @decoded["cloud_layer2_condition"], + @decoded["cloud_layer2_altitude_m"], + @decoded["cloud_layer2_altitude_ft"], + @decoded["cloud_layer3_condition"], + @decoded["cloud_layer3_altitude_m"], + @decoded["cloud_layer3_altitude_ft"]) + else + sky_str += sprintf(@strings['sky_str_format3'], + @decoded["cloud_layer2_condition"], + @decoded["cloud_layer2_altitude_m"], + @decoded["cloud_layer2_altitude_ft"]) + end + end + sky_str += "." + + if(@decoded.has_key?("visibility_miles")) + visibility = sprintf(@strings['visibility_format'], + @decoded["visibility_km"], + @decoded["visibility_miles"]) + else + visibility = "" + end + + if (@decoded.has_key?("wind_meters_per_second") && @decoded["wind_meters_per_second"].to_i > 0) + wind_str = sprintf(@strings['wind_str_format1'], + @decoded["wind_meters_per_second"], + @decoded["wind_miles_per_hour"]) + if (@decoded.has_key?("wind_gust_meters_per_second") && @decoded["wind_gust_meters_per_second"].to_i > 0) + wind_str += sprintf(@strings['wind_str_format2'], + @decoded["wind_gust_meters_per_second"], + @decoded["wind_gust_miles_per_hour"]) + end + wind_str += sprintf(@strings['wind_str_format3'], + @decoded["wind_dir_text"]) + else + wind_str = @strings['wind_str_calm'] + end + + prec_str = "" + if (@decoded.has_key?("precip_in")) + prec_str += pretty_print_precip(@decoded["precip_mm"], @decoded["precip_in"]) + @strings['precip_last_hour'] + end + if (@decoded.has_key?("precip_6h_in")) + prec_str += pretty_print_precip(@decoded["precip_6h_mm"], @decoded["precip_6h_in"]) + @strings['precip_last_6_hours'] + end + if (@decoded.has_key?("precip_24h_in")) + prec_str += pretty_print_precip(@decoded["precip_24h_mm"], @decoded["precip_24h_in"]) + @strings['precip_last_24_hours'] + end + if (@decoded.has_key?("snow_in")) + prec_str += sprintf(@strings['precip_snow'], @decoded["snow_mm"], @decoded["snow_in"]) + end + + temp_str = "" + if (@decoded.has_key?("temp_max6h_c") && @decoded.has_key?("temp_min6h_c")) + temp_str += sprintf(@strings['temp_min_max_6_hours'], + @decoded["temp_max6h_c"], + @decoded["temp_min6h_c"], + @decoded["temp_max6h_f"], + @decoded["temp_min6h_f"]) + else + if (@decoded.has_key?("temp_max6h_c")) + temp_str += sprintf(@strings['temp_max_6_hours'], + @decoded["temp_max6h_c"], + @decoded["temp_max6h_f"]) + end + if (@decoded.has_key?("temp_min6h_c")) + temp_str += sprintf(@strings['temp_max_6_hours'], + @decoded["temp_min6h_c"], + @decoded["temp_min6h_f"]) + end + end + if (@decoded.has_key?("temp_max24h_c")) + temp_str += sprintf(@strings['temp_min_max_24_hours'], + @decoded["temp_max24h_c"], + @decoded["temp_min24h_c"], + @decoded["temp_max24h_f"], + @decoded["temp_min24h_f"]) + end + + if (@decoded.has_key?("weather")) + weather_str = sprintf(@strings['current_weather'], @decoded["weather"]) + else + weather_str = '' + end + + return sprintf(@strings['pretty_print_metar'], + weather_age, + @date, + wind_str, @decoded["station"], @decoded["temp_c"], + @decoded["temp_f"], @decoded["altimeter_hpa"], + @decoded["altimeter_inhg"], + @decoded["rel_humidity"], sky_str, + visibility, weather_str, prec_str, temp_str).strip + end + + def to_s + @input + end + end + + def Utils.get_metar(station) + station.upcase! + + result = Utils.http_get("http://weather.noaa.gov/pub/data/observations/metar/stations/#{station}.TXT") + return nil unless result + return Metar.new(result) + end + end +end |