| 1 |
<?php |
| 2 |
|
| 3 |
namespace Better_Payment\Lite\AI\Services; |
| 4 |
|
| 5 |
use Better_Payment\Lite\AI\AIManager; |
| 6 |
use Better_Payment\Lite\AI\Layout\LayoutLibrary; |
| 7 |
use Better_Payment\Lite\AI\Schema\CampaignSchema; |
| 8 |
use Better_Payment\Lite\Campaign\Elements\ElementRegistry; |
| 9 |
use Better_Payment\Lite\Campaign\Templates\CategoryRegistry; |
| 10 |
|
| 11 |
if ( ! defined( 'ABSPATH' ) ) { |
| 12 |
exit; |
| 13 |
} |
| 14 |
|
| 15 |
/** |
| 16 |
* Full-campaign generation from a natural-language brief. |
| 17 |
* |
| 18 |
* Thin wrapper over {@see AIService} in 'generate' mode that also derives a |
| 19 |
* convenience { layout, meta } from the returned operations, so the /ai/generate |
| 20 |
* endpoint can hand the client a ready-to-apply campaign in addition to the raw |
| 21 |
* operations. |
| 22 |
*/ |
| 23 |
class CampaignGenerator { |
| 24 |
|
| 25 |
/** |
| 26 |
* A full page layout (the large `set_layout` tool call plus its element JSON) |
| 27 |
* needs far more output than a conversational edit. Generation therefore uses |
| 28 |
* a generous token floor so the layout is not truncated and silently dropped, |
| 29 |
* leaving only the small meta calls applied. |
| 30 |
*/ |
| 31 |
const GENERATE_TOKEN_FLOOR = 8000; |
| 32 |
|
| 33 |
/** |
| 34 |
* @param string $brief |
| 35 |
* @param array $context Optional starting state. |
| 36 |
* @param string $category Campaign category slug the user explicitly chose in |
| 37 |
* the Smart Prompt Wizard. '' when they picked no |
| 38 |
* category tile (or wrote their own prompt), in which |
| 39 |
* case one is inferred from the brief. |
| 40 |
* @param array $fields Campaign fields the user filled in themselves, keyed |
| 41 |
* by meta key. A key present but empty means they were |
| 42 |
* asked and left it blank, which is enforced as "stays |
| 43 |
* empty" — see {@see UserFieldGuard}. Absent entirely |
| 44 |
* (the free-form prompt path) leaves the model's value. |
| 45 |
* @return array|\WP_Error { assistant_message, operations, layout, meta, usage, layout_generated, category } |
| 46 |
*/ |
| 47 |
public static function generate( string $brief, array $context = [], string $category = '', array $fields = [] ) { |
| 48 |
$config = AIManager::config_for( AIManager::active_provider_id() ); |
| 49 |
$max_tokens = max( self::GENERATE_TOKEN_FLOOR, (int) ( $config['max_tokens'] ?? 0 ) ); |
| 50 |
$original = $brief; |
| 51 |
|
| 52 |
// Detect the category once, from the ORIGINAL brief — before the |
| 53 |
// structure/palette instructions are appended below. Those append element |
| 54 |
// names ("photo"), column roles and colour words that are ours, not the |
| 55 |
// user's, and matching against them would classify the campaign by our own |
| 56 |
// boilerplate. It is returned as metadata; it no longer picks the artwork. |
| 57 |
$resolved = self::resolve_category( $category, $original ); |
| 58 |
|
| 59 |
// Every AI-generated photo uses the single neutral default hero |
| 60 |
// (`ai-default-hero.svg`), for every category and template — never |
| 61 |
// category-specific artwork. This asset is always present, so a generated |
| 62 |
// photo can never fall back to an empty/broken `src` that renders as bare |
| 63 |
// alt text in the builder. The model cannot produce a real image URL, so |
| 64 |
// fill_default_photos() forces this onto every photo element. |
| 65 |
$photo_url = self::default_photo_url(); |
| 66 |
|
| 67 |
// Two structural paths, and only ONE of them may impose a structure: |
| 68 |
// |
| 69 |
// - The user pre-chose a layout in the template picker → build into that |
| 70 |
// exact structure, and snap the model's output onto it afterwards. The |
| 71 |
// structure is enforced because it is *the user's own choice*. |
| 72 |
// - No layout chosen → the structure is derived from the user's BRIEF. |
| 73 |
// Nothing is imposed, and `$selected` stays null so `attempt()` never |
| 74 |
// runs `enforce_structure()`. |
| 75 |
// |
| 76 |
// This branch used to pick a blueprint from LayoutLibrary and treat it |
| 77 |
// exactly like a user selection: it appended "build this layout with |
| 78 |
// exactly these columns and widths", and then rewrote every column's |
| 79 |
// width from the blueprint regardless of what came back. A user who asked |
| 80 |
// for "a 50/50 column campaign" was answered with a 42%/58% page — their |
| 81 |
// instruction was first contradicted by a more specific competing one, and |
| 82 |
// then overwritten by code that ignored the model's answer entirely. The |
| 83 |
// model could not have complied even if it tried. |
| 84 |
$selected = self::selected_structure( $context ); |
| 85 |
|
| 86 |
if ( null !== $selected ) { |
| 87 |
$brief .= self::structure_instruction( $selected ); |
| 88 |
} else { |
| 89 |
$brief .= self::layout_instruction(); |
| 90 |
$brief .= self::palette_instruction( LayoutLibrary::pick_palette( $original ) ); |
| 91 |
} |
| 92 |
|
| 93 |
// Offer the Pro widgets on an entitled install — in both structural paths, |
| 94 |
// since a user who pre-picked a layout has paid for them just the same. |
| 95 |
$brief .= self::pro_elements_instruction(); |
| 96 |
|
| 97 |
// Any video URL the model may keep has to come from the user, so read them |
| 98 |
// from the ORIGINAL brief — before our own instruction text is appended. |
| 99 |
$video_urls = self::urls_in( $original ); |
| 100 |
|
| 101 |
// Attempt generation. If the page layout doesn't come through (empty or |
| 102 |
// dropped set_layout), retry once — forcing a tool call and nudging toward a |
| 103 |
// concise, complete layout — before giving up honestly. |
| 104 |
$result = self::attempt( $brief, $context, $selected, $max_tokens, false, $photo_url, $fields, $video_urls ); |
| 105 |
if ( is_wp_error( $result ) ) { |
| 106 |
return $result; |
| 107 |
} |
| 108 |
if ( null === $result['layout'] ) { |
| 109 |
$retry = self::attempt( $brief . self::retry_instruction(), $context, $selected, $max_tokens, true, $photo_url, $fields, $video_urls ); |
| 110 |
if ( ! is_wp_error( $retry ) && null !== $retry['layout'] ) { |
| 111 |
$result = $retry; |
| 112 |
} |
| 113 |
} |
| 114 |
|
| 115 |
$layout = $result['layout']; |
| 116 |
$meta = $result['meta']; |
| 117 |
|
| 118 |
// Name the campaign: if the model didn't set a title but the layout has a |
| 119 |
// campaign_title, adopt its text (so the builder isn't left "Campaign Name"). |
| 120 |
if ( null !== $layout ) { |
| 121 |
$has_title_op = false; |
| 122 |
foreach ( $result['operations'] as $op ) { |
| 123 |
if ( is_array( $op ) && 'update_meta' === ( $op['op'] ?? '' ) && 'title' === ( $op['key'] ?? '' ) ) { |
| 124 |
$has_title_op = true; |
| 125 |
break; |
| 126 |
} |
| 127 |
} |
| 128 |
if ( ! $has_title_op && empty( $meta['title'] ) ) { |
| 129 |
$title = self::first_title( $layout ); |
| 130 |
if ( '' !== $title ) { |
| 131 |
$result['operations'][] = [ 'op' => 'update_meta', 'key' => 'title', 'value' => $title ]; |
| 132 |
$meta['title'] = $title; |
| 133 |
} |
| 134 |
} |
| 135 |
} |
| 136 |
|
| 137 |
$result['layout'] = $layout; |
| 138 |
$result['meta'] = $meta; |
| 139 |
$result['layout_generated'] = null !== $layout; |
| 140 |
// '' when the campaign matched no known category — the client can tell |
| 141 |
// "we used your category's artwork" from "we used the default hero". |
| 142 |
$result['category'] = $resolved; |
| 143 |
|
| 144 |
// Be honest: a generation that produced no page layout (only meta) left the |
| 145 |
// canvas empty. Do not report success — tell the user so they can retry. |
| 146 |
if ( null === $layout ) { |
| 147 |
$result['assistant_message'] = __( |
| 148 |
'I set up the campaign details, but the page layout did not come through — the response may have been too long. Please try generating again, optionally with a shorter brief.', |
| 149 |
'better-payment' |
| 150 |
); |
| 151 |
} |
| 152 |
|
| 153 |
return $result; |
| 154 |
} |
| 155 |
|
| 156 |
/** |
| 157 |
* One generation attempt: run the model, snap onto the chosen structure, and |
| 158 |
* extract { layout, meta }. An all-empty layout is dropped (returns layout null). |
| 159 |
* |
| 160 |
* @param string $brief |
| 161 |
* @param array $context |
| 162 |
* @param array|null $selected |
| 163 |
* @param int $max_tokens |
| 164 |
* @param bool $force Force a tool call (tool_choice: required). |
| 165 |
* @param string $photo_url Image to force onto every photo element. |
| 166 |
* @param array $fields The user's own campaign fields (see generate()). |
| 167 |
* @param array $video_urls URLs found in the user's brief — the only ones a |
| 168 |
* `video` element may keep (see guard_video_urls()). |
| 169 |
* @return array|\WP_Error |
| 170 |
*/ |
| 171 |
private static function attempt( string $brief, array $context, $selected, int $max_tokens, bool $force, string $photo_url = '', array $fields = [], array $video_urls = [] ) { |
| 172 |
$options = [ 'max_tokens' => $max_tokens ]; |
| 173 |
if ( $force ) { |
| 174 |
$options['tool_choice'] = 'required'; |
| 175 |
} |
| 176 |
|
| 177 |
$result = AIService::run( 'generate', $brief, $context, [], $options ); |
| 178 |
if ( is_wp_error( $result ) ) { |
| 179 |
return $result; |
| 180 |
} |
| 181 |
|
| 182 |
if ( null !== $selected ) { |
| 183 |
$result['operations'] = self::enforce_structure( $result['operations'], $selected ); |
| 184 |
} |
| 185 |
|
| 186 |
// Give photo elements a real image (the AI can't produce one), so the |
| 187 |
// campaign looks finished — users swap it via the media library. |
| 188 |
$result['operations'] = self::fill_default_photos( $result['operations'], $photo_url ); |
| 189 |
|
| 190 |
// Same reasoning as photos, sharper consequence: a model cannot know a real |
| 191 |
// video address either, and an invented one resolves to a stranger's video. |
| 192 |
$result['operations'] = self::guard_video_urls( $result['operations'], $video_urls ); |
| 193 |
|
| 194 |
// The amount tiers and the button that submits them are one action: the |
| 195 |
// button must sit directly under the Donate Amount block. Structural, so |
| 196 |
// the prompt alone cannot guarantee it — this is the part that holds. |
| 197 |
$result['operations'] = self::enforce_donate_button_placement( $result['operations'] ); |
| 198 |
|
| 199 |
// The user's own answers outrank the model's: a field they left blank |
| 200 |
// stays blank, and a value they gave is restored verbatim. Runs BEFORE |
| 201 |
// meta is derived below, so the operations and that meta always agree. |
| 202 |
$result['operations'] = UserFieldGuard::apply( $result['operations'], $fields ); |
| 203 |
|
| 204 |
// Bake every generated widget's registry defaults into its settings, so a |
| 205 |
// generated element never ships missing a default the way a hand-dropped |
| 206 |
// one never does. The model routinely omits keys, or emits a blank |
| 207 |
// ("" / [] / null) for a value it has no real answer for — and a blank |
| 208 |
// must fall back to the default, not overwrite it. The visible casualty is |
| 209 |
// the Video widget: guard_video_urls() drops an invented url and the model |
| 210 |
// often sends an empty one, which then clobbered the default sample video |
| 211 |
// and rendered an empty embed. This is general — every widget, every |
| 212 |
// default. Runs AFTER guard_video_urls() (so an invented/empty url is gone |
| 213 |
// and the default now fills it) and AFTER fill_default_photos() (so the |
| 214 |
// forced, non-blank photo src is preserved). |
| 215 |
$result['operations'] = self::fill_element_defaults( $result['operations'] ); |
| 216 |
|
| 217 |
$layout = null; |
| 218 |
$meta = []; |
| 219 |
foreach ( $result['operations'] as $operation ) { |
| 220 |
$op = $operation['op'] ?? ''; |
| 221 |
if ( 'set_layout' === $op ) { |
| 222 |
$layout = [ 'layout' => $operation['layout'], 'columns' => $operation['columns'] ]; |
| 223 |
} elseif ( 'update_meta' === $op ) { |
| 224 |
$meta[ $operation['key'] ] = $operation['value']; |
| 225 |
} elseif ( 'set_colors' === $op ) { |
| 226 |
if ( isset( $operation['primary'] ) ) { |
| 227 |
$meta['bpc_color_primary'] = $operation['primary']; |
| 228 |
} |
| 229 |
if ( isset( $operation['background'] ) ) { |
| 230 |
$meta['bpc_color_background'] = $operation['background']; |
| 231 |
} |
| 232 |
} elseif ( 'set_donation_amounts' === $op ) { |
| 233 |
$meta['bpc_suggested_amounts'] = $operation['amounts']; |
| 234 |
} |
| 235 |
} |
| 236 |
|
| 237 |
// An all-empty layout must not wipe the canvas — drop the set_layout op. |
| 238 |
if ( null !== $layout ) { |
| 239 |
$total = 0; |
| 240 |
foreach ( $layout['columns'] as $col ) { |
| 241 |
$total += is_array( $col['elements'] ?? null ) ? count( $col['elements'] ) : 0; |
| 242 |
} |
| 243 |
if ( 0 === $total ) { |
| 244 |
$layout = null; |
| 245 |
$result['operations'] = array_values( array_filter( |
| 246 |
$result['operations'], |
| 247 |
static function ( $op ) { |
| 248 |
return is_array( $op ) && 'set_layout' !== ( $op['op'] ?? '' ); |
| 249 |
} |
| 250 |
) ); |
| 251 |
} |
| 252 |
} |
| 253 |
|
| 254 |
$result['layout'] = $layout; |
| 255 |
$result['meta'] = $meta; |
| 256 |
return $result; |
| 257 |
} |
| 258 |
|
| 259 |
/** |
| 260 |
* Instruction appended to the retry brief when the first attempt produced no |
| 261 |
* usable layout. |
| 262 |
* |
| 263 |
* The type list is derived, never hardcoded. It used to be a literal string of |
| 264 |
* the ten free types, which meant a Pro install's retry told the model its Pro |
| 265 |
* widgets did not exist — and a retry is exactly the attempt that has to |
| 266 |
* produce the finished page. It also silently went stale the moment any |
| 267 |
* element was added to the registry. |
| 268 |
*/ |
| 269 |
private static function retry_instruction(): string { |
| 270 |
$types = implode( ', ', CampaignSchema::offerable_element_types() ); |
| 271 |
|
| 272 |
return "\n\n" . sprintf( |
| 273 |
/* translators: %s: comma-separated list of allowed element type keys. */ |
| 274 |
__( "Your previous attempt did not return a usable page layout. This time, call set_layout FIRST and keep every element's copy concise so the whole call fits in one response. Use ONLY these exact element type keys: %s.", 'better-payment' ), |
| 275 |
$types |
| 276 |
); |
| 277 |
} |
| 278 |
|
| 279 |
/** |
| 280 |
* Instruction naming the Pro widgets, appended only on an entitled install. |
| 281 |
* |
| 282 |
* The blueprint's per-column `pro` hints say *where* these go; this says what |
| 283 |
* they are and when they earn their place, so the model treats them as |
| 284 |
* deliberate additions rather than boxes to fill. Without it a Pro install |
| 285 |
* generated pages indistinguishable from a free one — the user paid for three |
| 286 |
* widgets the assistant never reached for. |
| 287 |
* |
| 288 |
* Two of the three carry a correctness constraint rather than a stylistic one, |
| 289 |
* repeated here because this is the text that actually invites their use: |
| 290 |
* Donors Wall renders live transaction data (writing donor names into a |
| 291 |
* fundraising page would be fabricating a record of who gave money), and Video |
| 292 |
* must not carry an invented URL. |
| 293 |
*/ |
| 294 |
private static function pro_elements_instruction(): string { |
| 295 |
if ( ! CampaignSchema::pro_enabled() ) { |
| 296 |
return ''; |
| 297 |
} |
| 298 |
|
| 299 |
return "\n\n" . __( "PRO WIDGETS AVAILABLE — this site has Better Payment Pro, so you may also use `donors_wall`, `faq` and `video`. Use them where they genuinely strengthen THIS campaign, not as a checklist: `faq` when a donor would hesitate over how the money is spent or whether giving is safe; `donors_wall` beside the donation ask to show momentum; `video` in the hero only when the brief actually supplies a video URL. Do not write donor names, amounts or dates into `donors_wall` — it renders real donations by itself. Do not invent a `video` URL.", 'better-payment' ); |
| 300 |
} |
| 301 |
|
| 302 |
/** |
| 303 |
* Settle on the campaign's category: the one the user explicitly chose, else |
| 304 |
* one inferred from the brief, else '' for a campaign that fits no category |
| 305 |
* we know ("a new category" — it gets the default hero). |
| 306 |
* |
| 307 |
* An explicit choice always wins. Only an *unknown* slug falls through to |
| 308 |
* inference, so a user who picked "Medical" never gets Environmental artwork |
| 309 |
* because their story happened to mention a flood. |
| 310 |
* |
| 311 |
* @param string $category Slug from the wizard; '' when none was picked. |
| 312 |
* @param string $brief The user's brief, for inference. |
| 313 |
* @return string A category slug, or ''. |
| 314 |
*/ |
| 315 |
public static function resolve_category( string $category, string $brief ): string { |
| 316 |
if ( CategoryRegistry::exists( $category ) ) { |
| 317 |
return $category; |
| 318 |
} |
| 319 |
return CategoryRegistry::match_text( $brief ); |
| 320 |
} |
| 321 |
|
| 322 |
/** |
| 323 |
* The default hero image for AI-generated campaigns — used for EVERY generated |
| 324 |
* photo, in every category. A neutral, on-brand illustration that suits any |
| 325 |
* fundraiser and reads as intentional (not a broken/empty box); users replace |
| 326 |
* it via the media library. Filterable so a site can point it at its own photo |
| 327 |
* globally. |
| 328 |
* |
| 329 |
* Every generated photo gets this one asset. Category-specific artwork was |
| 330 |
* retired here on purpose: a category photo can be missing on disk (a broken |
| 331 |
* `src` rendering as bare alt text), whereas `ai-default-hero.svg` always ships |
| 332 |
* with the plugin. Category detection ({@see self::resolve_category()}) remains |
| 333 |
* for metadata only. |
| 334 |
*/ |
| 335 |
public static function default_photo_url(): string { |
| 336 |
$default = defined( 'BETTER_PAYMENT_ASSETS' ) |
| 337 |
? BETTER_PAYMENT_ASSETS . '/img/campaign/ai-default-hero.svg' |
| 338 |
: ''; |
| 339 |
/** |
| 340 |
* Filter the default image applied to AI-generated photo elements. |
| 341 |
* |
| 342 |
* @param string $url |
| 343 |
*/ |
| 344 |
return (string) apply_filters( 'better_payment/ai/default_photo_url', $default ); |
| 345 |
} |
| 346 |
|
| 347 |
/** |
| 348 |
* Point every generated photo element at `$url` — always the default hero |
| 349 |
* ({@see self::default_photo_url()}), which is what {@see self::generate()} |
| 350 |
* passes. |
| 351 |
* |
| 352 |
* A text model cannot produce a real image URL, so any `src` it emits is a |
| 353 |
* hallucination that renders as a broken image. We therefore ALWAYS replace |
| 354 |
* the src (and reset the attachment id/sizes), while keeping the model's |
| 355 |
* descriptive `alt`. Real images come from the `generate_image` operation |
| 356 |
* instead, which runs client-side after generation. |
| 357 |
* |
| 358 |
* @param array $operations |
| 359 |
* @param string $url Image URL; falls back to the default hero when '', and |
| 360 |
* only skips the pass if that is empty too (never blanks a |
| 361 |
* photo). |
| 362 |
* @return array |
| 363 |
*/ |
| 364 |
public static function fill_default_photos( array $operations, string $url = '' ): array { |
| 365 |
if ( '' === $url ) { |
| 366 |
$url = self::default_photo_url(); |
| 367 |
} |
| 368 |
if ( '' === $url ) { |
| 369 |
return $operations; |
| 370 |
} |
| 371 |
|
| 372 |
foreach ( $operations as &$op ) { |
| 373 |
if ( ! is_array( $op ) ) { |
| 374 |
continue; |
| 375 |
} |
| 376 |
$name = $op['op'] ?? ''; |
| 377 |
|
| 378 |
if ( 'set_layout' === $name && ! empty( $op['columns'] ) && is_array( $op['columns'] ) ) { |
| 379 |
foreach ( $op['columns'] as &$col ) { |
| 380 |
if ( empty( $col['elements'] ) || ! is_array( $col['elements'] ) ) { |
| 381 |
continue; |
| 382 |
} |
| 383 |
foreach ( $col['elements'] as &$el ) { |
| 384 |
if ( is_array( $el ) && 'photo' === ( $el['type'] ?? '' ) ) { |
| 385 |
$el['settings'] = self::default_photo_settings( $el['settings'] ?? [], $url ); |
| 386 |
} |
| 387 |
} |
| 388 |
unset( $el ); |
| 389 |
} |
| 390 |
unset( $col ); |
| 391 |
} elseif ( 'insert_block' === $name && 'photo' === ( $op['type'] ?? '' ) ) { |
| 392 |
$op['settings'] = self::default_photo_settings( $op['settings'] ?? [], $url ); |
| 393 |
} |
| 394 |
} |
| 395 |
unset( $op ); |
| 396 |
|
| 397 |
return $operations; |
| 398 |
} |
| 399 |
|
| 400 |
/** |
| 401 |
* Force a photo element's settings onto the default image, keeping the model's |
| 402 |
* alt text when it provided one. |
| 403 |
* |
| 404 |
* @param mixed $settings |
| 405 |
* @param string $url |
| 406 |
* @return array |
| 407 |
*/ |
| 408 |
private static function default_photo_settings( $settings, string $url ): array { |
| 409 |
$settings = is_array( $settings ) ? $settings : []; |
| 410 |
$settings['src'] = $url; |
| 411 |
$settings['src_id'] = 0; |
| 412 |
$settings['src_sizes'] = []; |
| 413 |
if ( empty( $settings['alt'] ) ) { |
| 414 |
$settings['alt'] = __( 'Campaign image', 'better-payment' ); |
| 415 |
} |
| 416 |
return $settings; |
| 417 |
} |
| 418 |
|
| 419 |
/** |
| 420 |
* Every http(s) URL appearing in a string. |
| 421 |
* |
| 422 |
* @return array<int, string> |
| 423 |
*/ |
| 424 |
public static function urls_in( string $text ): array { |
| 425 |
if ( ! preg_match_all( '#https?://[^\s<>"\'\)\]]+#i', $text, $matches ) ) { |
| 426 |
return []; |
| 427 |
} |
| 428 |
|
| 429 |
$urls = []; |
| 430 |
foreach ( $matches[0] as $url ) { |
| 431 |
// Trailing sentence punctuation is not part of the address. |
| 432 |
$urls[] = rtrim( (string) $url, '.,;:!?' ); |
| 433 |
} |
| 434 |
|
| 435 |
return array_values( array_unique( array_filter( $urls ) ) ); |
| 436 |
} |
| 437 |
|
| 438 |
/** |
| 439 |
* Drop a `video` element's `url` unless the user's brief actually contained it. |
| 440 |
* |
| 441 |
* The exact problem {@see self::fill_default_photos()} solves, with a worse |
| 442 |
* failure mode. A text model has no way to know a real video address, so asked |
| 443 |
* for a campaign video it produces a well-formed YouTube URL with an invented |
| 444 |
* ID — and that ID belongs to *something*. The result is an unrelated |
| 445 |
* stranger's video embedded on a fundraising page, presented as the campaign's |
| 446 |
* own appeal. That is materially worse than a broken image, because it looks |
| 447 |
* entirely intentional. |
| 448 |
* |
| 449 |
* A URL the user typed is theirs and is kept verbatim. Anything else is |
| 450 |
* removed, which lets the element's schema default apply — the same sample |
| 451 |
* video a user gets when they drop the Video widget by hand, so the outcome is |
| 452 |
* a widget in its ordinary unconfigured state rather than a false claim. |
| 453 |
* |
| 454 |
* Note this cannot be left to the prompt: `rules.php` already forbids inventing |
| 455 |
* values, and a prompt is a request. This is the part that holds. |
| 456 |
* |
| 457 |
* @param array $operations |
| 458 |
* @param array $allowed URLs found in the user's brief. |
| 459 |
* @return array |
| 460 |
*/ |
| 461 |
public static function guard_video_urls( array $operations, array $allowed = [] ): array { |
| 462 |
foreach ( $operations as &$op ) { |
| 463 |
if ( ! is_array( $op ) ) { |
| 464 |
continue; |
| 465 |
} |
| 466 |
$name = $op['op'] ?? ''; |
| 467 |
|
| 468 |
if ( 'set_layout' === $name && ! empty( $op['columns'] ) && is_array( $op['columns'] ) ) { |
| 469 |
foreach ( $op['columns'] as &$col ) { |
| 470 |
if ( empty( $col['elements'] ) || ! is_array( $col['elements'] ) ) { |
| 471 |
continue; |
| 472 |
} |
| 473 |
foreach ( $col['elements'] as &$el ) { |
| 474 |
if ( is_array( $el ) && 'video' === ( $el['type'] ?? '' ) ) { |
| 475 |
$el['settings'] = self::guarded_video_settings( $el['settings'] ?? [], $allowed ); |
| 476 |
} |
| 477 |
} |
| 478 |
unset( $el ); |
| 479 |
} |
| 480 |
unset( $col ); |
| 481 |
} elseif ( 'insert_block' === $name && 'video' === ( $op['type'] ?? '' ) ) { |
| 482 |
$op['settings'] = self::guarded_video_settings( $op['settings'] ?? [], $allowed ); |
| 483 |
} |
| 484 |
} |
| 485 |
unset( $op ); |
| 486 |
|
| 487 |
return $operations; |
| 488 |
} |
| 489 |
|
| 490 |
/** |
| 491 |
* Remove an unvouched `url` from a video element's settings. |
| 492 |
* |
| 493 |
* Matching is exact against the brief's URLs, plus a prefix match so a user's |
| 494 |
* link that the model reproduced with extra query parameters (`&t=30s`) still |
| 495 |
* counts as theirs. |
| 496 |
* |
| 497 |
* @param mixed $settings |
| 498 |
* @param array $allowed |
| 499 |
* @return array |
| 500 |
*/ |
| 501 |
private static function guarded_video_settings( $settings, array $allowed ): array { |
| 502 |
$settings = is_array( $settings ) ? $settings : []; |
| 503 |
|
| 504 |
if ( ! isset( $settings['url'] ) ) { |
| 505 |
return $settings; |
| 506 |
} |
| 507 |
|
| 508 |
$url = trim( (string) $settings['url'] ); |
| 509 |
if ( '' === $url ) { |
| 510 |
return $settings; |
| 511 |
} |
| 512 |
|
| 513 |
foreach ( $allowed as $candidate ) { |
| 514 |
$candidate = trim( (string) $candidate ); |
| 515 |
if ( '' === $candidate ) { |
| 516 |
continue; |
| 517 |
} |
| 518 |
if ( $url === $candidate || 0 === strpos( $url, $candidate ) ) { |
| 519 |
return $settings; |
| 520 |
} |
| 521 |
} |
| 522 |
|
| 523 |
unset( $settings['url'] ); |
| 524 |
|
| 525 |
return $settings; |
| 526 |
} |
| 527 |
|
| 528 |
/** |
| 529 |
* Merge each generated element's registry defaults UNDER its settings, so a |
| 530 |
* generated widget carries the same complete defaults a hand-dropped one does. |
| 531 |
* |
| 532 |
* A model value overrides the default only when it is a real value. A blank — |
| 533 |
* `null`, an empty/whitespace string, or an empty array — is treated as "not |
| 534 |
* provided" and the default is kept. This is the crucial difference from a |
| 535 |
* plain `array_merge`: the client's own merge (`freshIds`/`withDefaults`) fills |
| 536 |
* only keys the model *omitted*, so a key the model emitted as `""` (which the |
| 537 |
* model does whenever it has no real value) still clobbered the default. That |
| 538 |
* is why a generated Video rendered an empty embed instead of the sample video. |
| 539 |
* |
| 540 |
* Generation-only on purpose. This is NOT the "emptied means empty" contract |
| 541 |
* that governs edits: there is no prior user state on a freshly generated page, |
| 542 |
* so a blank from the model is a non-answer, never a deliberate clear. Edits |
| 543 |
* (CampaignEditor) never run through here, and templates apply client-side |
| 544 |
* without it — so Pro's deliberately-empty template video `url` is untouched. |
| 545 |
* |
| 546 |
* @param array $operations |
| 547 |
* @return array |
| 548 |
*/ |
| 549 |
public static function fill_element_defaults( array $operations ): array { |
| 550 |
foreach ( $operations as &$op ) { |
| 551 |
if ( ! is_array( $op ) ) { |
| 552 |
continue; |
| 553 |
} |
| 554 |
$name = $op['op'] ?? ''; |
| 555 |
|
| 556 |
if ( 'set_layout' === $name && ! empty( $op['columns'] ) && is_array( $op['columns'] ) ) { |
| 557 |
foreach ( $op['columns'] as &$col ) { |
| 558 |
if ( empty( $col['elements'] ) || ! is_array( $col['elements'] ) ) { |
| 559 |
continue; |
| 560 |
} |
| 561 |
foreach ( $col['elements'] as &$el ) { |
| 562 |
if ( is_array( $el ) && ! empty( $el['type'] ) ) { |
| 563 |
$el['settings'] = self::with_element_defaults( |
| 564 |
(string) $el['type'], |
| 565 |
is_array( $el['settings'] ?? null ) ? $el['settings'] : [] |
| 566 |
); |
| 567 |
} |
| 568 |
} |
| 569 |
unset( $el ); |
| 570 |
} |
| 571 |
unset( $col ); |
| 572 |
} elseif ( 'insert_block' === $name && ! empty( $op['type'] ) ) { |
| 573 |
$op['settings'] = self::with_element_defaults( |
| 574 |
(string) $op['type'], |
| 575 |
is_array( $op['settings'] ?? null ) ? $op['settings'] : [] |
| 576 |
); |
| 577 |
} |
| 578 |
} |
| 579 |
unset( $op ); |
| 580 |
|
| 581 |
return $operations; |
| 582 |
} |
| 583 |
|
| 584 |
/** |
| 585 |
* The registry defaults for `$type`, with any non-blank model value laid on top. |
| 586 |
* |
| 587 |
* @param string $type |
| 588 |
* @param array $settings Model-supplied settings. |
| 589 |
* @return array |
| 590 |
*/ |
| 591 |
private static function with_element_defaults( string $type, array $settings ): array { |
| 592 |
$defaults = ElementRegistry::get_defaults( $type ); |
| 593 |
if ( empty( $defaults ) ) { |
| 594 |
return $settings; |
| 595 |
} |
| 596 |
|
| 597 |
$merged = $defaults; |
| 598 |
foreach ( $settings as $key => $value ) { |
| 599 |
if ( self::is_blank_value( $value ) ) { |
| 600 |
continue; // keep the default |
| 601 |
} |
| 602 |
$merged[ $key ] = $value; |
| 603 |
} |
| 604 |
|
| 605 |
return $merged; |
| 606 |
} |
| 607 |
|
| 608 |
/** |
| 609 |
* Whether a model-supplied setting value counts as "not provided", so the |
| 610 |
* registry default should stand. |
| 611 |
* |
| 612 |
* `null`, empty/whitespace strings and empty arrays are blank. `0`, `false` |
| 613 |
* and `'0'` are meaningful (a `number_to_show` of 0, a toggle turned off) and |
| 614 |
* must override the default, so they are NOT blank. |
| 615 |
* |
| 616 |
* @param mixed $value |
| 617 |
* @return bool |
| 618 |
*/ |
| 619 |
private static function is_blank_value( $value ): bool { |
| 620 |
if ( null === $value ) { |
| 621 |
return true; |
| 622 |
} |
| 623 |
if ( is_string( $value ) ) { |
| 624 |
return '' === trim( $value ); |
| 625 |
} |
| 626 |
if ( is_array( $value ) ) { |
| 627 |
return empty( $value ); |
| 628 |
} |
| 629 |
|
| 630 |
return false; |
| 631 |
} |
| 632 |
|
| 633 |
/** |
| 634 |
* Keep the Donate Button (`donation_form`) directly beneath the Donate Amount |
| 635 |
* (`donate_amount`) block in every generated campaign. |
| 636 |
* |
| 637 |
* The amount tiers and the button that submits them are one action split |
| 638 |
* across two widgets: a donor picks an amount and the very next thing they |
| 639 |
* must see is the button that takes it. A model composing "for the strongest |
| 640 |
* narrative" will happily park the button in the opposite column, or three |
| 641 |
* elements further down — which reads as two unrelated controls and loses the |
| 642 |
* click. So on every `set_layout`, whenever a `donate_amount` block is present: |
| 643 |
* |
| 644 |
* - an existing `donation_form` anywhere in the layout is moved to sit |
| 645 |
* immediately after it, in the SAME column (pulled across columns if the |
| 646 |
* model split them apart); |
| 647 |
* - if the layout has no `donation_form` at all, one is inserted there with |
| 648 |
* its registry defaults — every amount block must be followed by a button |
| 649 |
* (the same requirement `generate.php` states, made real here). |
| 650 |
* |
| 651 |
* Structural only — element settings are never touched. Same reasoning as the |
| 652 |
* photo and video guards: the prompt asks for this, and this is what holds it. |
| 653 |
* |
| 654 |
* @param array $operations |
| 655 |
* @return array |
| 656 |
*/ |
| 657 |
public static function enforce_donate_button_placement( array $operations ): array { |
| 658 |
foreach ( $operations as &$op ) { |
| 659 |
if ( ! is_array( $op ) || 'set_layout' !== ( $op['op'] ?? '' ) ) { |
| 660 |
continue; |
| 661 |
} |
| 662 |
if ( empty( $op['columns'] ) || ! is_array( $op['columns'] ) ) { |
| 663 |
continue; |
| 664 |
} |
| 665 |
$op['columns'] = self::place_donate_button( $op['columns'] ); |
| 666 |
} |
| 667 |
unset( $op ); |
| 668 |
|
| 669 |
return $operations; |
| 670 |
} |
| 671 |
|
| 672 |
/** |
| 673 |
* Position (or create) the Donate Button so it immediately follows the first |
| 674 |
* Donate Amount block. No-op when the layout carries no `donate_amount`. |
| 675 |
* |
| 676 |
* @param array $columns |
| 677 |
* @return array |
| 678 |
*/ |
| 679 |
private static function place_donate_button( array $columns ): array { |
| 680 |
if ( null === self::find_element( $columns, 'donate_amount' ) ) { |
| 681 |
return $columns; |
| 682 |
} |
| 683 |
|
| 684 |
// Take any existing button out of the layout (wherever the model put it) |
| 685 |
// so it can be dropped back in the right place; build a default when the |
| 686 |
// layout has none. |
| 687 |
$existing = self::find_element( $columns, 'donation_form' ); |
| 688 |
if ( null !== $existing ) { |
| 689 |
list( $bci, $bei ) = $existing; |
| 690 |
$button = $columns[ $bci ]['elements'][ $bei ]; |
| 691 |
array_splice( $columns[ $bci ]['elements'], $bei, 1 ); |
| 692 |
} else { |
| 693 |
$button = self::default_donate_button(); |
| 694 |
} |
| 695 |
|
| 696 |
// Re-find the amount block AFTER the removal — pulling the button out from |
| 697 |
// above it in the same column shifts its index — then drop the button in |
| 698 |
// directly beneath it. |
| 699 |
$amount_at = self::find_element( $columns, 'donate_amount' ); |
| 700 |
if ( null === $amount_at ) { |
| 701 |
return $columns; // Defensive: donate_amount was never removed, so unreachable. |
| 702 |
} |
| 703 |
list( $aci, $aei ) = $amount_at; |
| 704 |
array_splice( $columns[ $aci ]['elements'], $aei + 1, 0, array( $button ) ); |
| 705 |
|
| 706 |
return $columns; |
| 707 |
} |
| 708 |
|
| 709 |
/** |
| 710 |
* The [column index, element index] of the first element of `$type`, or null. |
| 711 |
* |
| 712 |
* @param array $columns |
| 713 |
* @param string $type |
| 714 |
* @return array|null |
| 715 |
*/ |
| 716 |
private static function find_element( array $columns, string $type ) { |
| 717 |
foreach ( $columns as $ci => $col ) { |
| 718 |
$elements = is_array( $col['elements'] ?? null ) ? $col['elements'] : []; |
| 719 |
foreach ( $elements as $ei => $el ) { |
| 720 |
if ( is_array( $el ) && $type === ( $el['type'] ?? '' ) ) { |
| 721 |
return [ $ci, $ei ]; |
| 722 |
} |
| 723 |
} |
| 724 |
} |
| 725 |
return null; |
| 726 |
} |
| 727 |
|
| 728 |
/** |
| 729 |
* A Donate Button element carrying its registry defaults — the same widget a |
| 730 |
* user gets by dropping "Donate Button" onto the canvas by hand. No `id`: the |
| 731 |
* client assigns ids to every `set_layout` element via freshIds(). |
| 732 |
* |
| 733 |
* @return array |
| 734 |
*/ |
| 735 |
private static function default_donate_button(): array { |
| 736 |
return [ |
| 737 |
'type' => 'donation_form', |
| 738 |
'settings' => ElementRegistry::get_defaults( 'donation_form' ), |
| 739 |
]; |
| 740 |
} |
| 741 |
|
| 742 |
/** |
| 743 |
* The first campaign_title element's title text in a layout, or ''. |
| 744 |
* |
| 745 |
* @param array $layout |
| 746 |
*/ |
| 747 |
private static function first_title( array $layout ): string { |
| 748 |
foreach ( $layout['columns'] ?? [] as $col ) { |
| 749 |
foreach ( $col['elements'] ?? [] as $el ) { |
| 750 |
if ( 'campaign_title' === ( $el['type'] ?? '' ) ) { |
| 751 |
$title = trim( (string) ( $el['settings']['title'] ?? '' ) ); |
| 752 |
if ( '' !== $title ) { |
| 753 |
return $title; |
| 754 |
} |
| 755 |
} |
| 756 |
} |
| 757 |
} |
| 758 |
return ''; |
| 759 |
} |
| 760 |
|
| 761 |
/** |
| 762 |
* The layout structure the user pre-selected, or null when the campaign is |
| 763 |
* a truly blank slate (no columns yet — the model may choose freely). |
| 764 |
* |
| 765 |
* @param array $context |
| 766 |
* @return array|null [ 'preset' => string, 'columns' => array ] |
| 767 |
*/ |
| 768 |
private static function selected_structure( array $context ) { |
| 769 |
$columns = $context['layout']['columns'] ?? null; |
| 770 |
if ( ! is_array( $columns ) || 0 === count( $columns ) ) { |
| 771 |
return null; |
| 772 |
} |
| 773 |
return [ |
| 774 |
'preset' => (string) ( $context['layout']['layout'] ?? '' ), |
| 775 |
'columns' => array_values( $columns ), |
| 776 |
]; |
| 777 |
} |
| 778 |
|
| 779 |
/** |
| 780 |
* Instruction appended to the brief when a layout is already selected. Lists |
| 781 |
* the exact columns (id + width + label) so the model returns that structure. |
| 782 |
* |
| 783 |
* @param array $selected |
| 784 |
*/ |
| 785 |
private static function structure_instruction( array $selected ): string { |
| 786 |
$lines = []; |
| 787 |
foreach ( $selected['columns'] as $i => $col ) { |
| 788 |
$lines[] = sprintf( |
| 789 |
' %d) id "%s", width %s%s', |
| 790 |
$i + 1, |
| 791 |
(string) ( $col['id'] ?? ( 'col' . ( $i + 1 ) ) ), |
| 792 |
(string) ( $col['width'] ?? '100%' ), |
| 793 |
! empty( $col['label'] ) ? ' — ' . $col['label'] : '' |
| 794 |
); |
| 795 |
} |
| 796 |
$preset = '' !== $selected['preset'] ? $selected['preset'] : 'multi-column'; |
| 797 |
|
| 798 |
return "\n\n" . sprintf( |
| 799 |
/* translators: 1: layout preset, 2: column count, 3: bullet list of columns. */ |
| 800 |
__( "IMPORTANT: The user has already chosen a %1\$s layout with exactly %2\$d column(s). Your set_layout MUST return exactly these columns, in this order, with these ids and widths — do not add, remove, or resize columns:\n%3\$s\nPlace appropriate elements into each column so the campaign fills the layout the user selected.", 'better-payment' ), |
| 801 |
$preset, |
| 802 |
count( $selected['columns'] ), |
| 803 |
implode( "\n", $lines ) |
| 804 |
); |
| 805 |
} |
| 806 |
|
| 807 |
/** |
| 808 |
* Prompt section for the free-form path: the page structure comes from the |
| 809 |
* user's own brief, and from nothing else. |
| 810 |
* |
| 811 |
* This replaces `blueprint_instruction()`, which named a pre-built layout and |
| 812 |
* ordered the model to reproduce its exact column count and widths. That was |
| 813 |
* a second, more specific instruction competing with whatever the user had |
| 814 |
* actually asked for — and the user lost every time. "Create a 50/50 column |
| 815 |
* campaign" arrived alongside "build the Donation-first layout … width 42% … |
| 816 |
* width 58% … keep the column count and widths above", and the page came back |
| 817 |
* 42/58. |
| 818 |
* |
| 819 |
* Nothing here prescribes a shape. It tells the model to read the user's |
| 820 |
* words for structure and obey them literally when they are there, and to |
| 821 |
* compose a structure that suits *this* story when they are not. The trade is |
| 822 |
* deliberate: the blueprint library existed to keep generated campaigns from |
| 823 |
* looking cloned, and that variety now has to come from the brief rather than |
| 824 |
* from a rotation we control. A page that ignores what the user typed is not |
| 825 |
* worth the variety. |
| 826 |
*/ |
| 827 |
private static function layout_instruction(): string { |
| 828 |
return "\n\n" . __( |
| 829 |
"PAGE STRUCTURE — take it from the brief above, never from a default.\n" |
| 830 |
. "1. Read the user's brief for anything that describes the page's shape: a number of columns, a split or ratio (\"50/50\", \"two equal columns\", \"70/30\"), a sidebar and which side it is on, a full-width or single-column page, a hero band, or the order sections should appear in. If the brief says it, build EXACTLY that — the stated column count, in the stated order, with widths matching the stated ratio (\"50/50\" means two columns of width \"50%\" and \"50%\"). A structural instruction from the user is not a preference to balance against your own judgement; it is the requirement.\n" |
| 831 |
. "2. If the brief says nothing about structure, choose the one that best serves THIS campaign's story and audience, and vary it to suit the subject — an emergency appeal, a memorial and a school fundraiser should not come out identically composed. Do not default to a single house layout.\n" |
| 832 |
. '3. Either way, set each column\'s `width` explicitly as a percentage string, pick the `layout` preset that matches the column count, and give every column a short, meaningful `label`.', |
| 833 |
'better-payment' |
| 834 |
); |
| 835 |
} |
| 836 |
|
| 837 |
/** |
| 838 |
* Prompt section suggesting a primary brand colour — explicitly as a |
| 839 |
* **fallback**, never as an override. |
| 840 |
* |
| 841 |
* Same failure mode as the old blueprint instruction, one notch quieter: this |
| 842 |
* used to read "Set a primary brand colour near #E5484D", flatly, with no |
| 843 |
* deference to the brief. A user who asked for their charity's green got our |
| 844 |
* red, for the same reason they got 42/58 columns — a specific, imperative |
| 845 |
* instruction of ours arriving after theirs. A colour named in the brief is a |
| 846 |
* brand decision, and it is not ours to make. |
| 847 |
* |
| 848 |
* @param array $palette [ 'primary' => hex, 'mood' => string ] |
| 849 |
*/ |
| 850 |
private static function palette_instruction( array $palette ): string { |
| 851 |
if ( empty( $palette['primary'] ) ) { |
| 852 |
return ''; |
| 853 |
} |
| 854 |
return "\n\n" . sprintf( |
| 855 |
/* translators: 1: hex colour, 2: mood description. */ |
| 856 |
__( 'COLOUR — if the brief names a colour, a brand or an existing palette, use that and ignore this line. Only if it names none, set a primary brand colour near %1$s for a %2$s tone (call set_colors).', 'better-payment' ), |
| 857 |
(string) $palette['primary'], |
| 858 |
(string) ( $palette['mood'] ?? '' ) |
| 859 |
); |
| 860 |
} |
| 861 |
|
| 862 |
/** |
| 863 |
* Snap any `set_layout` operation onto the user's selected structure so the |
| 864 |
* preset, column ids, labels and widths are always preserved — regardless of |
| 865 |
* what the model returned: |
| 866 |
* - Column counts match → keep the model's per-column elements, force the |
| 867 |
* column meta (id/label/width) from the selection. |
| 868 |
* - Counts differ → rebuild the selected columns and redistribute all the |
| 869 |
* model's elements across them proportionally to column width, so the |
| 870 |
* layout is never left broken (the split case's classic failure). |
| 871 |
* |
| 872 |
* @param array $operations |
| 873 |
* @param array $selected |
| 874 |
* @return array |
| 875 |
*/ |
| 876 |
private static function enforce_structure( array $operations, array $selected ): array { |
| 877 |
$orig = $selected['columns']; |
| 878 |
|
| 879 |
foreach ( $operations as &$operation ) { |
| 880 |
if ( ! is_array( $operation ) || 'set_layout' !== ( $operation['op'] ?? '' ) ) { |
| 881 |
continue; |
| 882 |
} |
| 883 |
|
| 884 |
if ( '' !== $selected['preset'] ) { |
| 885 |
$operation['layout'] = $selected['preset']; |
| 886 |
} |
| 887 |
|
| 888 |
$model_cols = is_array( $operation['columns'] ?? null ) ? $operation['columns'] : []; |
| 889 |
|
| 890 |
if ( count( $model_cols ) === count( $orig ) ) { |
| 891 |
foreach ( $model_cols as $i => $col ) { |
| 892 |
foreach ( [ 'id', 'label', 'width', 'widthTablet', 'widthMobile' ] as $key ) { |
| 893 |
if ( isset( $orig[ $i ][ $key ] ) ) { |
| 894 |
$model_cols[ $i ][ $key ] = $orig[ $i ][ $key ]; |
| 895 |
} |
| 896 |
} |
| 897 |
} |
| 898 |
$operation['columns'] = $model_cols; |
| 899 |
continue; |
| 900 |
} |
| 901 |
|
| 902 |
// Column count mismatch — flatten every element the model produced and |
| 903 |
// redistribute them across the selected columns by width weight. |
| 904 |
$all = []; |
| 905 |
foreach ( $model_cols as $col ) { |
| 906 |
$elements = is_array( $col['elements'] ?? null ) ? $col['elements'] : []; |
| 907 |
foreach ( $elements as $el ) { |
| 908 |
$all[] = $el; |
| 909 |
} |
| 910 |
} |
| 911 |
$operation['columns'] = self::distribute_elements( $all, $orig ); |
| 912 |
} |
| 913 |
unset( $operation ); |
| 914 |
|
| 915 |
return $operations; |
| 916 |
} |
| 917 |
|
| 918 |
/** |
| 919 |
* Distribute a flat list of elements across the given columns, weighted by |
| 920 |
* each column's width so wider columns receive more elements. Elements stay in |
| 921 |
* their original order and are placed contiguously. |
| 922 |
* |
| 923 |
* @param array $elements |
| 924 |
* @param array $columns The selected columns (id/label/width, no elements). |
| 925 |
* @return array Columns with an `elements` array on each. |
| 926 |
*/ |
| 927 |
private static function distribute_elements( array $elements, array $columns ): array { |
| 928 |
$out = []; |
| 929 |
foreach ( $columns as $col ) { |
| 930 |
$col['elements'] = []; |
| 931 |
$out[] = $col; |
| 932 |
} |
| 933 |
$n = count( $out ); |
| 934 |
if ( 0 === $n ) { |
| 935 |
return $out; |
| 936 |
} |
| 937 |
|
| 938 |
// Cumulative width fractions → boundaries for contiguous assignment. |
| 939 |
$weights = []; |
| 940 |
$total = 0.0; |
| 941 |
foreach ( $columns as $col ) { |
| 942 |
$w = (float) preg_replace( '/[^0-9.]/', '', (string) ( $col['width'] ?? '100' ) ); |
| 943 |
if ( $w <= 0 ) { |
| 944 |
$w = 1.0; |
| 945 |
} |
| 946 |
$weights[] = $w; |
| 947 |
$total += $w; |
| 948 |
} |
| 949 |
$bounds = []; |
| 950 |
$acc = 0.0; |
| 951 |
foreach ( $weights as $w ) { |
| 952 |
$acc += $w / $total; |
| 953 |
$bounds[] = $acc; |
| 954 |
} |
| 955 |
|
| 956 |
$count = count( $elements ); |
| 957 |
foreach ( $elements as $index => $element ) { |
| 958 |
$ratio = $count > 0 ? ( $index + 0.5 ) / $count : 0.0; |
| 959 |
$target = $n - 1; |
| 960 |
foreach ( $bounds as $i => $boundary ) { |
| 961 |
if ( $ratio <= $boundary ) { |
| 962 |
$target = $i; |
| 963 |
break; |
| 964 |
} |
| 965 |
} |
| 966 |
$out[ $target ]['elements'][] = $element; |
| 967 |
} |
| 968 |
|
| 969 |
return $out; |
| 970 |
} |
| 971 |
} |
| 972 |
|
