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export function enforceLen(
str: string,
len: number,
ellipsis = false,
mode: 'end' | 'middle' = 'end',
): string {
str = str || ''
if (str.length > len) {
if (ellipsis) {
if (mode === 'end') {
return str.slice(0, len) + '…'
} else if (mode === 'middle') {
const half = Math.floor(len / 2)
return str.slice(0, half) + '…' + str.slice(-half)
} else {
// fallback
return str.slice(0, len)
}
} else {
return str.slice(0, len)
}
}
return str
}
// https://stackoverflow.com/a/52171480
export function toHashCode(str: string, seed = 0): number {
let h1 = 0xdeadbeef ^ seed,
h2 = 0x41c6ce57 ^ seed
for (let i = 0, ch; i < str.length; i++) {
ch = str.charCodeAt(i)
h1 = Math.imul(h1 ^ ch, 2654435761)
h2 = Math.imul(h2 ^ ch, 1597334677)
}
h1 = Math.imul(h1 ^ (h1 >>> 16), 2246822507)
h1 ^= Math.imul(h2 ^ (h2 >>> 13), 3266489909)
h2 = Math.imul(h2 ^ (h2 >>> 16), 2246822507)
h2 ^= Math.imul(h1 ^ (h1 >>> 13), 3266489909)
return 4294967296 * (2097151 & h2) + (h1 >>> 0)
}
export function countLines(str: string | undefined): number {
if (!str) return 0
return str.match(/\n/g)?.length ?? 0
}
// Augments search query with additional syntax like `from:me`
export function augmentSearchQuery(query: string, {did}: {did?: string}) {
// Don't do anything if there's no DID
if (!did) {
return query
}
// We don't want to replace substrings that are being "quoted" because those
// are exact string matches, so what we'll do here is to split them apart
// Even-indexed strings are unquoted, odd-indexed strings are quoted
const splits = query.split(/("(?:[^"\\]|\\.)*")/g)
return splits
.map((str, idx) => {
if (idx % 2 === 0) {
return str.replaceAll(/(^|\s)from:me(\s|$)/g, `$1${did}$2`)
}
return str
})
.join('')
}
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