class Akismet_REST_API { /** * Register the REST API routes. */ public static function init() { if ( ! function_exists( 'register_rest_route' ) ) { // The REST API wasn't integrated into core until 4.4, and we support 4.0+ (for now). return false; } register_rest_route( 'akismet/v1', '/key', array( array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_key' ), ), array( 'methods' => WP_REST_Server::EDITABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'set_key' ), 'args' => array( 'key' => array( 'required' => true, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_key' ), 'description' => __( 'A 12-character Akismet API key. Available at akismet.com/get/', 'akismet' ), ), ), ), array( 'methods' => WP_REST_Server::DELETABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'delete_key' ), ) ) ); register_rest_route( 'akismet/v1', '/settings/', array( array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_settings' ), ), array( 'methods' => WP_REST_Server::EDITABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'set_boolean_settings' ), 'args' => array( 'akismet_strictness' => array( 'required' => false, 'type' => 'boolean', 'description' => __( 'If true, Akismet will automatically discard the worst spam automatically rather than putting it in the spam folder.', 'akismet' ), ), 'akismet_show_user_comments_approved' => array( 'required' => false, 'type' => 'boolean', 'description' => __( 'If true, show the number of approved comments beside each comment author in the comments list page.', 'akismet' ), ), ), ) ) ); register_rest_route( 'akismet/v1', '/stats', array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_stats' ), 'args' => array( 'interval' => array( 'required' => false, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_interval' ), 'description' => __( 'The time period for which to retrieve stats. Options: 60-days, 6-months, all', 'akismet' ), 'default' => 'all', ), ), ) ); register_rest_route( 'akismet/v1', '/stats/(?P[\w+])', array( 'args' => array( 'interval' => array( 'description' => __( 'The time period for which to retrieve stats. Options: 60-days, 6-months, all', 'akismet' ), 'type' => 'string', ), ), array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_stats' ), ) ) ); register_rest_route( 'akismet/v1', '/alert', array( array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'remote_call_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_alert' ), 'args' => array( 'key' => array( 'required' => false, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_key' ), 'description' => __( 'A 12-character Akismet API key. Available at akismet.com/get/', 'akismet' ), ), ), ), array( 'methods' => WP_REST_Server::EDITABLE, 'permission_callback' => array( 'Akismet_REST_API', 'remote_call_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'set_alert' ), 'args' => array( 'key' => array( 'required' => false, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_key' ), 'description' => __( 'A 12-character Akismet API key. Available at akismet.com/get/', 'akismet' ), ), ), ), array( 'methods' => WP_REST_Server::DELETABLE, 'permission_callback' => array( 'Akismet_REST_API', 'remote_call_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'delete_alert' ), 'args' => array( 'key' => array( 'required' => false, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_key' ), 'description' => __( 'A 12-character Akismet API key. Available at akismet.com/get/', 'akismet' ), ), ), ) ) ); register_rest_route( 'akismet/v1', '/webhook', array( 'methods' => WP_REST_Server::CREATABLE, 'callback' => array( 'Akismet_REST_API', 'receive_webhook' ), 'permission_callback' => array( 'Akismet_REST_API', 'remote_call_permission_callback' ), ) ); } /** * Get the current Akismet API key. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function get_key( $request = null ) { return rest_ensure_response( Akismet::get_api_key() ); } /** * Set the API key, if possible. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function set_key( $request ) { if ( defined( 'WPCOM_API_KEY' ) ) { return rest_ensure_response( new WP_Error( 'hardcoded_key', __( 'This site\'s API key is hardcoded and cannot be changed via the API.', 'akismet' ), array( 'status'=> 409 ) ) ); } $new_api_key = $request->get_param( 'key' ); if ( ! self::key_is_valid( $new_api_key ) ) { return rest_ensure_response( new WP_Error( 'invalid_key', __( 'The value provided is not a valid and registered API key.', 'akismet' ), array( 'status' => 400 ) ) ); } update_option( 'wordpress_api_key', $new_api_key ); return self::get_key(); } /** * Unset the API key, if possible. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function delete_key( $request ) { if ( defined( 'WPCOM_API_KEY' ) ) { return rest_ensure_response( new WP_Error( 'hardcoded_key', __( 'This site\'s API key is hardcoded and cannot be deleted.', 'akismet' ), array( 'status'=> 409 ) ) ); } delete_option( 'wordpress_api_key' ); return rest_ensure_response( true ); } /** * Get the Akismet settings. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function get_settings( $request = null ) { return rest_ensure_response( array( 'akismet_strictness' => ( get_option( 'akismet_strictness', '1' ) === '1' ), 'akismet_show_user_comments_approved' => ( get_option( 'akismet_show_user_comments_approved', '1' ) === '1' ), ) ); } /** * Update the Akismet settings. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function set_boolean_settings( $request ) { foreach ( array( 'akismet_strictness', 'akismet_show_user_comments_approved', ) as $setting_key ) { $setting_value = $request->get_param( $setting_key ); if ( is_null( $setting_value ) ) { // This setting was not specified. continue; } // From 4.7+, WP core will ensure that these are always boolean // values because they are registered with 'type' => 'boolean', // but we need to do this ourselves for prior versions. $setting_value = Akismet_REST_API::parse_boolean( $setting_value ); update_option( $setting_key, $setting_value ? '1' : '0' ); } return self::get_settings(); } /** * Parse a numeric or string boolean value into a boolean. * * @param mixed $value The value to convert into a boolean. * @return bool The converted value. */ public static function parse_boolean( $value ) { switch ( $value ) { case true: case 'true': case '1': case 1: return true; case false: case 'false': case '0': case 0: return false; default: return (bool) $value; } } /** * Get the Akismet stats for a given time period. * * Possible `interval` values: * - all * - 60-days * - 6-months * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function get_stats( $request ) { $api_key = Akismet::get_api_key(); $interval = $request->get_param( 'interval' ); $stat_totals = array(); $request_args = array( 'blog' => get_option( 'home' ), 'key' => $api_key, 'from' => $interval, ); $request_args = apply_filters( 'akismet_request_args', $request_args, 'get-stats' ); $response = Akismet::http_post( Akismet::build_query( $request_args ), 'get-stats' ); if ( ! empty( $response[1] ) ) { $stat_totals[$interval] = json_decode( $response[1] ); } return rest_ensure_response( $stat_totals ); } /** * Get the current alert code and message. Alert codes are used to notify the site owner * if there's a problem, like a connection issue between their site and the Akismet API, * invalid requests being sent, etc. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function get_alert( $request ) { return rest_ensure_response( array( 'code' => get_option( 'akismet_alert_code' ), 'message' => get_option( 'akismet_alert_msg' ), ) ); } /** * Update the current alert code and message by triggering a call to the Akismet server. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function set_alert( $request ) { delete_option( 'akismet_alert_code' ); delete_option( 'akismet_alert_msg' ); // Make a request so the most recent alert code and message are retrieved. Akismet::verify_key( Akismet::get_api_key() ); return self::get_alert( $request ); } /** * Clear the current alert code and message. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function delete_alert( $request ) { delete_option( 'akismet_alert_code' ); delete_option( 'akismet_alert_msg' ); return self::get_alert( $request ); } private static function key_is_valid( $key ) { $request_args = array( 'key' => $key, 'blog' => get_option( 'home' ), ); $request_args = apply_filters( 'akismet_request_args', $request_args, 'verify-key' ); $response = Akismet::http_post( Akismet::build_query( $request_args ), 'verify-key' ); if ( $response[1] == 'valid' ) { return true; } return false; } public static function privileged_permission_callback() { return current_user_can( 'manage_options' ); } /** * For calls that Akismet.com makes to the site to clear outdated alert codes, use the API key for authorization. */ public static function remote_call_permission_callback( $request ) { $local_key = Akismet::get_api_key(); return $local_key && ( strtolower( $request->get_param( 'key' ) ) === strtolower( $local_key ) ); } public static function sanitize_interval( $interval, $request, $param ) { $interval = trim( $interval ); $valid_intervals = array( '60-days', '6-months', 'all', ); if ( ! in_array( $interval, $valid_intervals ) ) { $interval = 'all'; } return $interval; } public static function sanitize_key( $key, $request, $param ) { return trim( $key ); } /** * Process a webhook request from the Akismet servers. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function receive_webhook( $request ) { Akismet::log( array( 'Webhook request received', $request->get_body() ) ); /** * The request body should look like this: * array( * 'key' => '1234567890abcd', * 'endpoint' => '[comment-check|submit-ham|submit-spam]', * 'comments' => array( * array( * 'guid' => '[...]', * 'result' => '[true|false]', * 'comment_author' => '[...]', * [...] * ), * array( * 'guid' => '[...]', * [...], * ), * [...] * ) * ) * * Multiple comments can be included in each request, and the only truly required * field for each is the guid, although it would be friendly to include also * comment_post_ID, comment_parent, and comment_author_email, if possible to make * searching easier. */ // The response will include statuses for the result of each comment that was supplied. $response = array( 'comments' => array(), ); $endpoint = $request->get_param( 'endpoint' ); switch ( $endpoint ) { case 'comment-check': $webhook_comments = $request->get_param( 'comments' ); if ( ! is_array( $webhook_comments ) ) { return rest_ensure_response( new WP_Error( 'malformed_request', __( 'The \'comments\' parameter must be an array.', 'akismet' ), array( 'status' => 400 ) ) ); } foreach ( $webhook_comments as $webhook_comment ) { $guid = $webhook_comment['guid']; if ( ! $guid ) { // Without the GUID, we can't be sure that we're matching the right comment. // We'll make it a rule that any comment without a GUID is ignored intentionally. continue; } // Search on the fields that are indexed in the comments table, plus the GUID. // The GUID is the only thing we really need to search on, but comment_meta // is not indexed in a useful way if there are many many comments. This // should help narrow it down first. $queryable_fields = array( 'comment_post_ID' => 'post_id', 'comment_parent' => 'parent', 'comment_author_email' => 'author_email', ); $query_args = array(); $query_args['status'] = 'any'; $query_args['meta_key'] = 'akismet_guid'; $query_args['meta_value'] = $guid; foreach ( $queryable_fields as $queryable_field => $wp_comment_query_field ) { if ( isset( $webhook_comment[ $queryable_field ] ) ) { $query_args[ $wp_comment_query_field ] = $webhook_comment[ $queryable_field ]; } } $comments_query = new WP_Comment_Query( $query_args ); $comments = $comments_query->comments; if ( ! $comments ) { // Unexpected, although the comment could have been deleted since being submitted. Akismet::log( 'Webhook failed: no matching comment found.' ); $response['comments'][ $guid ] = array( 'status' => 'error', 'message' => __( 'Could not find matching comment.', 'akismet' ) ); continue; } if ( count( $comments ) > 1 ) { // Two comments shouldn't be able to match the same GUID. Akismet::log( 'Webhook failed: multiple matching comments found.', $comments ); $response['comments'][ $guid ] = array( 'status' => 'error', 'message' => __( 'Multiple comments matched request.', 'akismet' ) ); continue; } else { // We have one single match, as hoped for. Akismet::log( 'Found matching comment.', $comments ); $current_status = wp_get_comment_status( $comments[0] ); $result = $webhook_comment['result']; if ( 'true' == $result ) { Akismet::log( 'Comment should be spam' ); // The comment should be classified as spam. if ( 'spam' != $current_status ) { // The comment is not classified as spam. If Akismet was the one to act on it, move it to spam. if ( Akismet::last_comment_status_change_came_from_akismet( $comments[0]->comment_ID ) ) { Akismet::log( 'Comment is not spam; marking as spam.' ); wp_spam_comment( $comments[0] ); Akismet::update_comment_history( $comments[0]->comment_ID, '', 'webhook-spam' ); } else { Akismet::log( 'Comment is not spam, but it has already been manually handled by some other process.' ); Akismet::update_comment_history( $comments[0]->comment_ID, '', 'webhook-spam-noaction' ); } } } else if ( 'false' == $result ) { Akismet::log( 'Comment should be ham' ); // The comment should be classified as ham. if ( 'spam' == $current_status ) { Akismet::log( 'Comment is spam.' ); // The comment is classified as spam. If Akismet was the one to label it as spam, unspam it. if ( Akismet::last_comment_status_change_came_from_akismet( $comments[0]->comment_ID ) ) { Akismet::log( 'Akismet marked it as spam; unspamming.' ); wp_unspam_comment( $comments[0] ); akismet::update_comment_history( $comments[0]->comment_ID, '', 'webhook-ham' ); } else { Akismet::log( 'Comment is not spam, but it has already been manually handled by some other process.' ); Akismet::update_comment_history( $comments[0]->comment_ID, '', 'webhook-ham-noaction' ); } } } $response['comments'][ $guid ] = array( 'status' => 'success' ); } } break; case 'submit-ham': case 'submit-spam': // Nothing to do for submit-ham or submit-spam. break; default: // Unsupported endpoint. break; } /** * Allow plugins to do things with a successfully processed webhook request, like logging. * * @since 5.3.2 * * @param WP_REST_Request $request The REST request object. */ do_action( 'akismet_webhook_received', $request ); Akismet::log( 'Done processing webhook.' ); return rest_ensure_response( $response ); } } Tin likely to edge higher on looming supply crunch | Modern Business International
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Saturday, June 14, 2025
HomeMarkets NewsTin likely to edge higher on looming supply crunch

Tin likely to edge higher on looming supply crunch

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Though tin prices have dropped by over 12.5 per cent from a six-month high seen during July-end, the metal will likely edge higher in the months ahead on looming supply crunch, say experts.

Currently, the 3-month tin contract is quoted at $25,475 a tonne – a three-month low, while for cash, the metal is quoted below $25,000. 

According to Jeremy Pearce, Market Intelligence and Communications, International Tin Research Association, the metal has dropped from the highs of $29,000 in July as deteriorating economic indicators from China have weighed on all base metals. 

Price forecast

Research agency BMI, a unit of Fitch Solutions, said a number of regulatory changes point to looming supply crunch in the global tin market. But renewed strength of the dollar is capping the growth in tin price.

However, it said it was maintaining its tin price forecasts for 2023 at $25,000. BMI said it anticipates prices will edge higher over the coming months as the seaborne tin market starts to see a fall in supplies as the mining ban of Wa province in Myanmar rolls on and Indonesia’s export ban comes into force.

“While Mainland Chinese demand remains tepid despite the country’s reopening, the banning of tin mining in Myanmar’s Wa region as well as Indonesia’s tin ingot export ban will ensure the global tin market becomes tighter in the coming months,” it said.

China, focal point

Pearce said anticipation surrounding Myanmar’s August 1 mining halt bolstered prices amid tepid fundamentals. But since then, the metal has shown a pronounced decline.  

“As uncertainties persist, China will likely remain the focal point in the fourth quarter,” he said.

Trading Economics said the halt in production in Wa will likely result in the supply of raw materials for Chinese smelting being affected. It will pose challenges to matching earlier production levels. 

However, global semiconductor sales, which serve as a proxy for tin soldering usage, recorded a year-on-year decline of 17.3 per cent in June, it said.

BMI said its forecast reflects continued weaker demand over 2023 as worsening economic indicators and elevated levels of inflation mean weaker consumer spending on electronics, a major source of tin demand. The short-term demand (2022-2023) in the global consumer electronics market will lag behind that of 2021 given the high base rate and the loss of momentum in consumer spending after the vaccine rollout-driven rebound and rampant inflation, it said. 

BMI forecast refined tin consumption growth to ease, “with just 0.3 per cent year-on-year (y-o-y) growth in 2023 compared with 0.5 per cent y-o-y in 2022.

Surplus may shrink

On the other hand, global tin stocks have increased, particularly from June 2022 onwards, which will limit the potential for price increases, it said.

BMI sees market surplus will shrink in 2024 as the Myanmar ban impact will be felt. 

The upside risk to tin price could be a stronger pickup in Chinese tin demand in the coming. Similarly, a slower-than-expected ramp up in refined tin supply from China could result in tin prices remaining more elevated.

On the downside, further strengthening of the dollar and weakening of global demand would force prices to lower than pre-Covid levels, it said.





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