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string.ts
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string.ts
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/**
* String related filters
*
* * prefer stringify() to String() since `undefined`, `null` should eval ''
*/
import { stringify } from '../../util/underscore'
export default {
'append': (v: string, arg: string) => stringify(v) + arg,
'prepend': (v: string, arg: string) => arg + stringify(v),
'capitalize': capitalize,
'lstrip': (v: string) => stringify(v).replace(/^\s+/, ''),
'downcase': (v: string) => stringify(v).toLowerCase(),
'upcase': (str: string) => stringify(str).toUpperCase(),
'remove': (v: string, arg: string) => stringify(v).split(arg).join(''),
'remove_first': (v: string, l: string) => stringify(v).replace(l, ''),
'replace': replace,
'replace_first': replaceFirst,
'rstrip': (str: string) => stringify(str).replace(/\s+$/, ''),
'split': (v: string, arg: string) => stringify(v).split(arg),
'strip': (v: string) => stringify(v).trim(),
'strip_newlines': (v: string) => stringify(v).replace(/\n/g, ''),
'truncate': truncate,
'truncatewords': truncateWords
}
function capitalize (str: string) {
str = stringify(str)
return str.charAt(0).toUpperCase() + str.slice(1)
}
function replace (v: string, pattern: string, replacement: string) {
return stringify(v).split(pattern).join(replacement)
}
function replaceFirst (v: string, arg1: string, arg2: string) {
return stringify(v).replace(arg1, arg2)
}
function truncate (v: string, l: number = 50, o: string = '...') {
v = stringify(v)
if (v.length <= l) return v
return v.substr(0, l - o.length) + o
}
function truncateWords (v: string, l: number = 15, o: string = '...') {
const arr = v.split(/\s+/)
let ret = arr.slice(0, l).join(' ')
if (arr.length >= l) ret += o
return ret
}