posts.go
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posts.go
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	package parse

	import (
	"github.com/writeas/web-core/stringmanip"
	"regexp"
	"strings"
	)

	var (
	titleElementReg = regexp.MustCompile("</?p>")
	urlReg = regexp.MustCompile("https?://")
	imgReg = regexp.MustCompile(`!\[([^]]+)\]$[^)]+$`)
	)

	// PostLede attempts to extract the first thought of the given post, generally
	// contained within the first line or sentence of text.
	func PostLede(t string, includePunc bool) string {
	// Adjust where we truncate if we want to include punctuation
	iAdj := 0
	if includePunc {
	iAdj = 1
	}

	// Find lede within first line of text
	nl := strings.IndexRune(t, '\n')
	if nl > -1 {
	t = t[:nl]
	}

	// Strip certain HTML tags
	t = titleElementReg.ReplaceAllString(t, "")

	// Strip URL protocols
	t = urlReg.ReplaceAllString(t, "")

	// Strip image URL, leaving only alt text
	t = imgReg.ReplaceAllString(t, " $1 ")

	// Find lede within first sentence
	punc := strings.Index(t, ". ")
	if punc > -1 {
	t = t[:punc+iAdj]
	}
	punc = stringmanip.IndexRune(t, '。')
	if punc > -1 {
	c := []rune(t)
	t = string(c[:punc+iAdj])
	}

	return t
	}

	// TruncToWord truncates the given text to the provided limit.
	func TruncToWord(s string, l int) (string, bool) {
	truncated := false
	c := []rune(s)
	if len(c) > l {
	truncated = true
	s = string(c[:l])
	spaceIdx := strings.LastIndexByte(s, ' ')
	if spaceIdx > -1 {
	s = s[:spaceIdx]
	}
	}
	return s, truncated
	}