#!/bin/bash
# Manage WordPress categories and tags: list existing ones or create new
# ones, so post.sh's CATEGORIES/TAGS (numeric IDs) can be filled in.

USER="" # WP user
PASSWORD="" # application password generated for your WP user
SERVER="" # server hostname, optionally with subdirectories
USER_AGENT="Mozilla/5.0 (X11; Linux x86_64) wordpress-rest-curl/1.0" # some hosts block curl's default UA as bot traffic

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/lib/config.sh"

# CLI options:
#   --site NAME     same config layering as post.sh
#   --type TYPE     'category' (default) or 'tag'
#   --list          list existing terms as "id<TAB>name<TAB>slug<TAB>count"
#   --create NAME   create a new term, print its id
#   --find NAME     print the id of an existing term with an exact name
#                   match, or exit 1 if none exists
SITE=""
TYPE="category"
ACTION=""
NAME=""
while [[ $# -gt 0 ]]; do
    case "$1" in
        --site)
            SITE="$2"; shift 2 ;;
        --type)
            TYPE="$2"; shift 2 ;;
        --list)
            ACTION="list"; shift ;;
        --create)
            ACTION="create"; NAME="$2"; shift 2 ;;
        --find)
            ACTION="find"; NAME="$2"; shift 2 ;;
        *)
            echo "Unknown argument: $1" >&2
            exit 1 ;;
    esac
done

[[ "$TYPE" == "category" || "$TYPE" == "tag" ]] || { echo "Unknown --type: $TYPE (expected 'category' or 'tag')" >&2; exit 1; }
[[ -n "$ACTION" ]] || { echo "Specify one of --list, --create NAME, --find NAME" >&2; exit 1; }

wp_load_config

ENDPOINT_PATH="/wp-json/wp/v2/categories"
[[ "$TYPE" == "tag" ]] && ENDPOINT_PATH="/wp-json/wp/v2/tags"

case "$ACTION" in
    list)
        wp_api_list_all "$ENDPOINT_PATH" | jq -r '[.id, .name, .slug, .count] | @tsv'
        ;;
    find)
        FOUND_ID=$(wp_api_list_all "$ENDPOINT_PATH" | jq -r --arg name "$NAME" 'select(.name == $name) | .id' | head -n1)
        if [[ -n "$FOUND_ID" ]]; then
            echo "$FOUND_ID"
        else
            echo "No $TYPE named '$NAME' found." >&2
            exit 1
        fi
        ;;
    create)
        PAYLOAD=$(jq -n --arg name "$NAME" '{name: $name}')
        BODY=$(wp_api_call POST "$ENDPOINT_PATH" -H "Content-Type: application/json" --data "$PAYLOAD") || exit 1
        echo "$BODY" | jq -r '.id'
        ;;
esac