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util.go
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util.go
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// Copyright 2017 Inca Roads LLC. All rights reserved.
// Use of this source code is governed by licenses granted by the
// copyright holder including that found in the LICENSE file.
package main
import (
"fmt"
"hash/crc32"
"math/rand"
"os"
"strconv"
"strings"
"time"
)
// UtilInit initializes the utility package
func UtilInit() {
// Initialize the random number generator
rand.Seed(time.Now().Unix() + int64(crc32.ChecksumIEEE([]byte(TTServeInstanceID))))
}
// Random gets a random number in a range
func Random(min, max int) int {
return rand.Intn(max-min) + min
}
// SafecastDirectory gets the path of the root safecast file system folder shared among instances
func SafecastDirectory() string {
directory := ""
if len(os.Args) > 1 {
directory = os.Args[1]
}
if directory == "" {
fmt.Printf("TTSERVE: first argument must be folder containing safecast data!\n")
os.Exit(0)
}
return (directory)
}
// LogTime gets the current time in log format
func LogTime() string {
return time.Now().Format(logDateFormat)
}
// NowInUTC gets the current time in UTC as a string formatted for log files
func NowInUTC() string {
return time.Now().UTC().Format("2006-01-02T15:04:05Z")
}
// AgoMinutes returns, readably, a duration given a count of minutes
func AgoMinutes(minutesAgo uint32) string {
var hoursAgo = minutesAgo / 60
var daysAgo = hoursAgo / 24
minutesAgo -= hoursAgo * 60
hoursAgo -= daysAgo * 24
s := ""
if daysAgo >= 14 {
if (daysAgo % 7) == 0 {
s = fmt.Sprintf("%d weeks", daysAgo/7)
} else {
s = fmt.Sprintf("%d+ weeks", daysAgo/7)
}
} else if daysAgo > 2 {
s = fmt.Sprintf("%d days", daysAgo)
} else if daysAgo == 2 && hoursAgo == 0 {
s = fmt.Sprintf("%d days", daysAgo)
} else if daysAgo == 1 && hoursAgo == 0 {
s = fmt.Sprintf("%d day", daysAgo)
} else if daysAgo != 0 {
s = fmt.Sprintf("%dd %dh", daysAgo, hoursAgo)
} else if hoursAgo != 0 {
s = fmt.Sprintf("%dh %dm", hoursAgo, minutesAgo)
} else if minutesAgo < 1 {
s = "<1m"
} else if minutesAgo < 100 {
s = fmt.Sprintf("%02dm", minutesAgo)
} else {
s = fmt.Sprintf("%dm", minutesAgo)
}
return s
}
// Ago is like AgoMinutes, but with a time.Time
func Ago(when time.Time) string {
return AgoMinutes(uint32(int64(time.Since(when) / time.Minute)))
}
// GetWhenFromOffset takes a GPS-formatted base date and time, plus offset, and returns a UTC string
func GetWhenFromOffset(baseDate uint32, baseTime uint32, offset uint32) string {
var i64 uint64
s := fmt.Sprintf("%06d%06d", baseDate, baseTime)
i64, _ = strconv.ParseUint(fmt.Sprintf("%c%c", s[0], s[1]), 10, 32)
day := uint32(i64)
i64, _ = strconv.ParseUint(fmt.Sprintf("%c%c", s[2], s[3]), 10, 32)
month := uint32(i64)
i64, _ = strconv.ParseUint(fmt.Sprintf("%c%c", s[4], s[5]), 10, 32)
year := uint32(i64) + 2000
i64, _ = strconv.ParseUint(fmt.Sprintf("%c%c", s[6], s[7]), 10, 32)
hour := uint32(i64)
i64, _ = strconv.ParseUint(fmt.Sprintf("%c%c", s[8], s[9]), 10, 32)
minute := uint32(i64)
i64, _ = strconv.ParseUint(fmt.Sprintf("%c%c", s[10], s[11]), 10, 32)
second := uint32(i64)
tbefore := time.Date(int(year), time.Month(month), int(day), int(hour), int(minute), int(second), 0, time.UTC)
tafter := tbefore.Add(time.Duration(offset) * time.Second)
return tafter.UTC().Format("2006-01-02T15:04:05Z")
}
// ErrorString cleans up an error string to eliminate the filename so that it can be logged without PII
func ErrorString(err error) string {
errString := fmt.Sprintf("%s", err)
s0 := strings.Split(errString, ":")
s1 := s0[len(s0)-1]
s2 := strings.TrimSpace(s1)
return s2
}
// RemapCommonUnicodeToASCII converts common UTF-8 strings to ASCII, where ASCII is required
func RemapCommonUnicodeToASCII(str string) string {
Conversions := []string{
"\\u2000", " ", // EN QUAD
"\\u2001", " ", // EM QUAD
"\\u2002", " ", // EN SPACE
"\\u2003", " ", // EM SPACE
"\\u2004", " ", // THREE-PER-EM SPACE
"\\u2005", " ", // FOUR-PER-EM SPACE
"\\u2006", " ", // SIX-PER-EM SPACE
"\\u2007", " ", // FIGURE SPACE
"\\u2008", " ", // PUNCTUATION SPACE
"\\u2009", " ", // THIN SPACE
"\\u200A", " ", // HAIR SPACE
"\\u200B", " ", // ZERO WIDTH SPACE
"\\u200C", " ", // ZERO WIDTH NON-JOINER
"\\u200D", " ", // ZERO WIDTH JOINER
"\\u200E", "", // LEFT-TO-RIGHT MARK
"\\u200F", "", // RIGHT-TO-LEFT MARK
"\\u2010", "-", // HYPHEN
"\\u2011", "-", // NON-BREAKING HYPHEN
"\\u2012", "-", // FIGURE DASH
"\\u2013", "-", // EN DASH
"\\u2014", "-", // EM DASH
"\\u2015", "-", // HORIZONTAL BAR
"\\u2016", "|", // DOUBLE VERTICAL LINE
"\\u2017", "_", // DOUBLE LOW LINE
"\\u2018", "'", // LEFT SINGLE QUOTATION MARK
"\\u2019", "'", // RIGHT SINGLE QUOTATION MARK
"\\u201A", "'", // SINGLE LOW-9 QUOTATION MARK
"\\u201B", "'", // SINGLE HIGH-REVERSED-9 QUOTATION MARK
"\\u201C", "\"", // LEFT DOUBLE QUOTATION MARK
"\\u201D", "\"", // RIGHT DOUBLE QUOTATION MARK
"\\u201E", "\"", // DOUBLE LOW-9 QUOTATION MARK
"\\u201F", "\"", // DOUBLE HIGH-REVERSED-9 QUOTATION MARK
"\\u2020", "|", // DAGGER
"\\u2021", "|", // DOUBLE DAGGER
"\\u2022", "-", // BULLET
"\\u2023", ">", // TRIANGULAR BULLET
"\\u2024", ".", // ONE DOT LEADER
"\\u2025", "..", // TWO DOT LEADER
"\\u2026", "...", // HORIZONTAL ELLIPSIS
"\\u2027", "-", // HYPHENATION POINT
"\\u2028", "", // LINE SEPARATOR
"\\u2029", "", // PARAGRAPH SEPARATOR
"\\u202A", "", // LEFT-TO-RIGHT EMBEDDING
"\\u202B", "", // RIGHT-TO-LEFT EMBEDDING
"\\u202C", "", // POP DIRECTIONAL FORMATTING
"\\u202D", "", // LEFT-TO-RIGHT OVERRIDE
"\\u202E", "", // RIGHT-TO-LEFT OVERRIDE
"\\u202F", " ", // NARROW NO-BREAK SPACE
"\\u2030", "%", // PER MILLE SIGN
"\\u2031", "%", // PER TEN THOUSAND SIGN
"\\u2032", "'", // PRIME
"\\u2033", "\"", // DOUBLE PRIME
"\\u2034", "\"", // TRIPLE PRIME
"\\u2035", "'", // REVERSED PRIME
"\\u2036", "\"", // REVERSED DOUBLE PRIME
"\\u2037", "\"", // REVERSED TRIPLE PRIME
"\\u2038", "^", // CARET
"\\u2039", "<", // SINGLE LEFT-POINTING ANGLE QUOTATION MARK
"\\u203A", ">", // SINGLE RIGHT-POINTING ANGLE QUOTATION MARK
"\\u203B", "*", // REFERENCE MARK
"\\u203C", "!!", // DOUBLE EXCLAMATION MARK
"\\u203D", "?!", // INTERROBANG
"\\u203E", "=", // OVERLINE
"\\u203F", "_", // UNDERTIE
"\\u2040", "-", // TIE
"\\u2041", "|", // CARET INSERTION POINT
"\\u2042", "*", // ASTERISM
"\\u2043", "-", // HYPHEN BULLET
"\\u2044", "/", // FRACTION SLASH
"\\u2045", "{", // LEFT SQUARE BRACKET WITH QUILL
"\\u2046", "}", // RIGHT SQUARE BRACKET WITH QUILL
"\\u2047", "??", // DOUBLE QUESTION MARK
"\\u2048", "?!", // QUESTION EXCLAMATION MARK
"\\u2049", "!?", // EXCLAMATION QUESTION MARK
"\\u204A", "-", // TIRONIAN SIGN ET
"\\u204B", "%", // REVERSED PILCROW SIGN
"\\u204C", "<", // BLACK LEFTWARDS BULLET
"\\u204D", ">", // BLACK RIGHTWARDS BULLET
"\\u204E", "*", // LOW ASTERISK
"\\u204F", ";", // REVERSED SEMICOLON
"\\u2050", "_", // CLOSE UP
"\\u2051", "**", // TWO ASTERISKS ALIGNED VERTICALLY
"\\u2052", "%", // COMMERCIAL MINUS SIGN
"\\u2053", "~", // SWUNG DASH
"\\u2054", "_", // INVERTED UNDERTIE
"\\u2055", "*", // FLOWER PUNCTUATION MARK
"\\u2056", "...", // THREE DOT PUNCTUATION
"\\u2057", "\"\"", // QUADRUPLE PRIME
"\\u2058", ":", // FOUR DOT PUNCTUATION
"\\u2059", ":", // FIVE DOT PUNCTUATION
"\\u205A", ":", // TWO DOT PUNCTUATION
"\\u205B", ":", // FOUR DOT MARK
"\\u205C", "#", // DOTTED CROSS
"\\u205D", ":", // TRICOLON
"\\u205E", ":", // VERTICAL FOUR DOTS
"\\u205F", " ", // MEDIUM MATHEMATICAL SPACE
"\\u2060", "", // WORD JOINER
"\\u2061", "", // FUNCTION APPLICATION
"\\u2062", "*", // INVISIBLE TIMES
"\\u2063", " ", // INVISIBLE SEPARATOR
"\\u2064", "+", // INVISIBLE PLUS
"\\u2065", " ", // INVISIBLE SPACE
"\\u2066", "", // LEFT-TO-RIGHT ISOLATE
"\\u2067", "", // RIGHT-TO-LEFT ISOLATE
"\\u2068", "", // FIRST STRONG ISOLATE
"\\u2069", "", // POP DIRECTIONAL ISOLATE
"\\u206A", "", // INHIBIT SYMMETRIC SWAPPING
"\\u206B", "", // ACTIVATE SYMMETRIC SWAPPING
"\\u206C", "", // INHIBIT ARABIC FORM SHAPING
"\\u206D", "", // ACTIVATE ARABIC FORM SHAPING
"\\u206E", "?", // NATIONAL DIGIT SHAPES
"\\u206F", "", // NOMINAL DIGIT SHAPES
"\\u2070", "0", // SUPERSCRIPT ZERO
"\\u2071", "i", // SUPERSCRIPT LATIN SMALL LETTER I
"\\u2072", "", // ?
"\\u2073", "", // ?
"\\u2074", "4", // SUPERSCRIPT FOUR
"\\u2075", "5", // SUPERSCRIPT FIVE
"\\u2076", "6", // SUPERSCRIPT SIX
"\\u2077", "7", // SUPERSCRIPT SEVEN
"\\u2078", "8", // SUPERSCRIPT EIGHT
"\\u2079", "9", // SUPERSCRIPT NINE
"\\u207A", "+", // SUPERSCRIPT PLUS SIGN
"\\u207B", "-", // SUPERSCRIPT MINUS
"\\u207C", "=", // SUPERSCRIPT EQUALS SIGN
"\\u207D", "(", // SUPERSCRIPT LEFT PARENTHESIS
"\\u207E", ")", // SUPERSCRIPT RIGHT PARENTHESIS
"\\u207F", "n", // SUPERSCRIPT LATIN SMALL LETTER N
"", ""}
// First, convert UTF-8 to ASCII so we can replace it
ascii := strconv.QuoteToASCII(str)
// Now, loop through the conversions
for i := 0; Conversions[i] != ""; i += 2 {
ascii = strings.Replace(ascii, Conversions[i], Conversions[i+1], -1)
}
// Now, remove the outer quotes that we added
ascii, _ = strconv.Unquote(ascii)
// Done
return ascii
}