wgctl/core/ui.sh

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#!/usr/bin/env bash
UI_ROW_WIDTH=${UI_ROW_WIDTH:-20}
UI_SECTION_WIDTH=${UI_SECTION_WIDTH:-44}
function ui::row() {
local label="$1" value="$2" width="${3:-$UI_ROW_WIDTH}"
printf " %-${width}s %s\n" "${label}:" "$value"
}
function ui::section() {
local title="$1" width="${2:-$UI_SECTION_WIDTH}"
local dashes
dashes=$(printf '─%.0s' $(seq 1 $(( width - ${#title} - 4 ))))
printf "\n \033[0;37m── %s %s\033[0m\n" "$title" "$dashes"
}
function ui::list_item() {
local prefix="$1" value="$2"
printf " %s %s\n" "$prefix" "$value"
}
function ui::print_list() {
local prefix="$1" input="$2"
[[ -z "$input" ]] && return 0 # early return for empty input
while IFS= read -r e; do
[[ -n "$e" ]] && ui::list_item "$prefix" "$e"
done <<< "$input"
}
function ui::divider() {
local width="${1:-48}"
printf " %s\n" "$(printf '─%.0s' $(seq 1 $width))"
}
function ui::pad() {
local text="$1" width="${2:-20}"
local visible
visible=$(echo -e "$text" | sed 's/\x1b\[[0-9;]*m//g')
local pad=$(( width - ${#visible} ))
printf "%b%${pad}s" "$text" ""
}
function ui::pad_mb() {
local text="$1" width="${2:-20}"
local visible
visible=$(printf "%b" "$text" | sed 's/\x1b\[[0-9;]*m//g')
local vis_len
vis_len=$(python3 -c "import sys; print(len(sys.stdin.read().rstrip('\n')))" \
<<< "$visible")
local pad=$(( width - vis_len ))
[[ $pad -lt 0 ]] && pad=0
printf "%b%${pad}s" "$text" ""
}
function ui::vis_len_multi() {
# Get visible lengths of multiple strings in one Python call
# Returns newline-separated integers
python3 -c "
import sys, re
ansi = re.compile(r'\x1b\[[0-9;]*m')
for s in sys.argv[1:]:
print(len(ansi.sub('', s)))
" "$@"
}
function ui::pad_status() {
ui::pad "${1:-}" "${2:-25}"
}
function ui::center() {
local text="$1" width="${2:-8}"
local len=${#text}
local pad=$(( (width - len) / 2 ))
local rpad=$(( width - len - pad ))
printf "%${pad}s%s%${rpad}s" "" "$text" ""
}
# ui::measure_col <data> <field_index> [min_width]
# Scans pipe-delimited data and returns the max visible width
# of the field at field_index (1-based), with optional minimum.
# Strips ANSI codes before measuring.
# Usage:
# name_width=$(ui::measure_col "$data" 1 10)
# ip_width=$(ui::measure_col "$data" 2 14)
function ui::measure_col() {
local data="${1:-}" field_index="${2:-1}" min_width="${3:-0}"
local max=$min_width
while IFS='|' read -r line; do
local val
val=$(echo "$line" | cut -d'|' -f"$field_index")
# Strip ANSI codes for accurate measurement
local clean
clean=$(echo "$val" | sed 's/\x1b\[[0-9;]*m//g')
local len=${#clean}
(( len > max )) && max=$len
done <<< "$data"
echo $max
}
# ui::measure_cols <data> <field_indices...>
# Measure multiple columns at once, returns space-separated widths.
# Usage: read -r w1 w2 w3 <<< $(ui::measure_cols "$data" 1 2 3)
function ui::measure_cols() {
local data="${1:-}"
shift
local widths=()
for idx in "$@"; do
widths+=("$(ui::measure_col "$data" "$idx")")
done
echo "${widths[*]}"
}
function ui::sort_rows() {
local field="${1:-1}"
sort -t'|' -k"${field},${field}V"
}
function ui::firewall_rule() {
local rule="$1"
if [[ "$rule" =~ ACCEPT|DNAT ]]; then
printf "\033[0;32m%s\033[0m\n" "$rule"
elif [[ "$rule" =~ DROP ]]; then
printf "\033[0;31m%s\033[0m\n" "$rule"
elif [[ "$rule" =~ NFLOG|LOG ]]; then
printf "\033[0;37m%s\033[0m\n" "$rule"
else
printf "%s\n" "$rule"
fi
}
# ============================================
# Content Helpers
# ============================================
function ui::has_content() {
# Returns 0 (true) if content exists, 1 if empty
# Works with strings, arrays, or command output
local value="${1:-}"
[[ -n "$value" ]]
}
function ui::skip_if_empty() {
# Usage: ui::skip_if_empty "$var" || return 0
# Or: ui::skip_if_empty "${array[*]}" || return 0
local value="${1:-}"
[[ -z "${value// }" ]] && return 1 || return 0
}
function ui::empty() {
local val="${1:-}"
# Empty string or whitespace only
[[ -z "${val// }" ]] && return 0
# Numeric zero
[[ "$val" =~ ^[0-9]+$ ]] && [[ "$val" -eq 0 ]] && return 0
return 1
}
# Usage: ui::bool "$value" [yes_label] [no_label]
# Default labels: yes / no
function ui::bool() {
local val="${1:-}" yes="${2:-yes}" no="${3:-no}"
[[ "$val" == "true" ]] && echo "$yes" || echo "$no"
}
# ============================================
# Prompt
# ============================================
function ui::confirm() {
local prompt="${1:-Are you sure?}"
local response
printf " %s [y/N] " "$prompt"
read -r response
[[ "${response,,}" == "y" || "${response,,}" == "yes" ]]
}