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feat: watch: try pager mode..

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yukkop
2025-04-04 02:09:43 +00:00
parent d800266fe0
commit c5e9d9c8cb
8 changed files with 6363 additions and 202 deletions
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package/c/hmpl/hmpl.c
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@@ -66,180 +66,148 @@ void hmpl_render_interpolation_tags(Arena *arena, char **text_ptr, const Json *
}
}
// CREATE OR REPLACE FUNCTION common.render_template_loop_blocks(result TEXT, context JSONB)
// RETURNS TEXT LANGUAGE plpgsql AS $$
// DECLARE
// loop_start INT;
// key_end INT;
// loop_end INT;
// loop_key TEXT;
// block TEXT;
// rendered_block TEXT;
// arr JSONB;
// item JSONB;
// item_text TEXT;
// BEGIN
// LOOP
// loop_start := strpos(result, '{{#');
// EXIT WHEN loop_start = 0; -- Exit if no loop start found.
//
// -- Locate the end of the loop key marker.
// key_end := strpos(result, '}}', loop_start);
// IF key_end = 0 THEN
// RAISE EXCEPTION 'Malformed template: missing closing braces for loop start';
// END IF;
//
// -- Extract the key used for the loop.
// loop_key := substr_cloneing(result from loop_start + 3 for key_end - loop_start - 3);
//
// RAISE DEBUG 'loop key %', loop_key;
//
// -- Find the matching loop end marker for this key.
// loop_end := strpos(result, '{{/#' || loop_key || '}}', key_end);
// IF loop_end = 0 THEN
// RAISE EXCEPTION 'Malformed template: missing loop end for key %', loop_key;
// END IF;
//
// -- Extract the inner block of the loop.
// block := substr_cloneing(result from key_end + 2 for loop_end - key_end - 2);
//
// -- Retrieve the JSON array from the context for the loop key.
// arr := eval_value(context, loop_key);
// rendered_block := '';
//
// -- If an array is found, iterate over each element.
// IF arr IS NOT NULL AND jsonb_typeof(arr) = 'array' THEN
// FOR item IN SELECT * FROM jsonb_array_elements(arr) LOOP
// item_text := block; -- Begin with the raw block.
// IF jsonb_typeof(item) != 'object' THEN
// -- Replace interpolation for primitive values.
// item_text := replace(item_text, '{{.}}', item::text);
// ELSE
// -- For object values, iterate over each key/value.
// item_text := render_template_interpolations(item_text, item, '.'::CHAR(1));
// item_text := render_template_conditions(item_text, item, '.');
// END IF;
// rendered_block := rendered_block || item_text;
// END LOOP;
// END IF;
//
// -- Replace the entire loop block in the result with the rendered content.
// result := substr_cloneing(result from 1 for loop_start - 1)
// || rendered_block
// || substr_cloneing(result from loop_end + char_length('{{/#' || loop_key || '}}'));
// END LOOP;
//
// RETURN result;
// END $$;
// {{#array_key}}
void hmpl_render_section_tags(Arena *arena, char **text_ptr, Json *context, const char * const prefix_start, const char * const prefix_end, const char * const separator_pattern){
raise_debug("hmpl_render_section_tags(%p, %s, <optimized>, %s, %s, %s)", arena, *text_ptr, prefix_start, prefix_end, separator_pattern);
char start_pattern[32];
snprintf(start_pattern, sizeof(start_pattern), "{{%s", prefix_start);
int start_pattern_length = strlen(start_pattern);
// TODO: rename close_tag_start_pattern
char end_pattern[32];
snprintf(end_pattern, sizeof(end_pattern), "{{%s", prefix_end);
int end_pattern_length = strlen(end_pattern);
int separator_pattern_length = strlen(separator_pattern);
if (!separator_pattern || separator_pattern_length == 0) {
raise_exception("Unexpected usage: separator pattern cannot be empty");
}
int offset = 0;
while (1) {
char *current_text = *text_ptr;
char *opening_tag_start = strstr(current_text + offset, start_pattern);
if (!opening_tag_start)
break;
int start_index = opening_tag_start - current_text;
int relative_key_start = start_index + start_pattern_length;
char *opening_tag_separator = strstr(opening_tag_start, separator_pattern);
if (!opening_tag_start) {
raise_exception("Malformed template: missing separator for section tag or not specifiet name for element");
exit(1);
}
int separator_index = opening_tag_separator - current_text;
int element_name_start = separator_index + separator_pattern_length;
char *opening_tag_end = strstr(opening_tag_separator, "}}");
if (!opening_tag_end) {
raise_exception("Malformed template: missing closing braces for section tag");
exit(1);
}
assert((size_t)opening_tag_end > (size_t)opening_tag_separator);
assert((size_t)opening_tag_separator > (size_t)opening_tag_start);
int key_length = (opening_tag_separator - current_text) - relative_key_start;
assert(key_length > 0);
// {{item#array}}...{{/array}}
void hmpl_render_section_tags(Arena *arena, char **text_ptr, Json *context, const char * const prefix_start, const char * const prefix_end, const char * const separator_pattern) {
raise_debug("hmpl_render_section_tags(%p, %s, <optimized>, %s, %s, %s)", arena, *text_ptr, prefix_start, prefix_end, separator_pattern);
char *key = arena_alloc(arena, key_length + 1);
substr_clone(current_text, key, relative_key_start, key_length);
// Create search patterns
char start_pattern[32];
snprintf(start_pattern, sizeof(start_pattern), "{{%s", prefix_start);
Slice start_slice = slice_create(char, start_pattern, strlen(start_pattern), 0, strlen(start_pattern));
int element_name_length = (opening_tag_end - current_text) - element_name_start;
assert(element_name_length > 0);
char *element_name = arena_alloc(arena, element_name_length + 1);
substr_clone(current_text, element_name, element_name_start, element_name_length);
int close_tag_patern_length = start_pattern_length + key_length + end_pattern_length;
char *close_tag_patern = arena_alloc(arena, close_tag_patern_length + 1);
snprintf(close_tag_patern, sizeof(*close_tag_patern), "%s%s%s", start_pattern, key, end_pattern);
char *close_tag = strstr(opening_tag_end + offset + 1, close_tag_patern);
if (!close_tag) {
raise_exception("Malformed template: missing loop end for key %s", key);
exit(1);
// Create a mutable copy of separator_pattern
char separator_copy[32];
strncpy(separator_copy, separator_pattern, sizeof(separator_copy) - 1);
separator_copy[sizeof(separator_copy) - 1] = '\0';
Slice separator_slice = slice_create(char, separator_copy, strlen(separator_copy), 0, strlen(separator_copy));
if (separator_slice.len == 0) {
raise_exception("Unexpected usage: separator pattern cannot be empty");
}
Json *arr = eval_object(arena, context, key);
// Create slice for the text
Slice text_slice = slice_create(char, *text_ptr, strlen(*text_ptr), 0, strlen(*text_ptr));
size_t offset = 0;
if (arr && arr->type == JSON_ARRAY) {
size_t elem_count = 0;
for (Json *e = arr->child; e; e = e->next) elem_count++;
char *replacement = arena_alloc(arena, MEM_KiB * elem_count);
size_t offset = 0;
while (1) {
// Find tag start
char *text_data = (char*)text_slice.data;
char *opening_tag_start = strstr(text_data + offset, (char*)start_slice.data);
if (!opening_tag_start) break;
char *block_buff = arena_alloc(arena, MEM_KiB);
size_t relative_block_start = (size_t)opening_tag_end + 2 - (size_t)current_text;
raise_trace("relative_block_start: %p = %p - 2 - %p", opening_tag_end, current_text);
size_t block_len = (size_t)opening_tag_end - (size_t)close_tag - 2;
raise_trace("block_len %p = %p - %p - 2", block_len, opening_tag_end, close_tag);
assert(block_len > 0);
substr_clone(current_text, block_buff, relative_block_start, block_len);
for (Json *elem = arr->child; elem; elem = elem->next) {
char *block = arena_strdup(arena, block_buff);
char *prefix = arena_alloc(arena, element_name_length + 2);
snprintf(prefix, element_name_length + 2, "%s.", element_name);
hmpl_render_interpolation_tags(arena, &block, context, prefix);
raise_trace("block after: %s", block);
size_t block_len = strlen(block);
memcpy(replacement + offset, block, block_len);
offset += block_len;
// Create slice for separator search
size_t start_index = opening_tag_start - text_data;
Slice remaining_slice = slice_subslice(text_slice, start_index, text_slice.len - start_index);
// Find separator
char *opening_tag_separator = strstr((char*)remaining_slice.data, (char*)separator_slice.data);
if (!opening_tag_separator) {
raise_exception("Malformed template: missing separator for section tag or not specified name for element");
exit(1);
}
// Extract element name (now before separator)
size_t separator_index = opening_tag_separator - (char*)remaining_slice.data;
size_t element_name_start = start_slice.len;
size_t element_name_length = separator_index;
char *element_name = arena_alloc(arena, element_name_length + 1);
substr_clone((char*)remaining_slice.data, element_name, element_name_start, element_name_length);
element_name[element_name_length] = '\0';
// Find closing braces
Slice after_separator = slice_subslice(remaining_slice, separator_index + separator_slice.len,
remaining_slice.len - separator_index - separator_slice.len);
char *opening_tag_end = strstr((char*)after_separator.data, "}}");
if (!opening_tag_end) {
raise_exception("Malformed template: missing closing braces for section tag");
exit(1);
}
replacement[offset] = '\0';
raise_trace("replacement: %s", replacement);
// Extract key (now after separator)
size_t key_start = 0;
size_t key_length = opening_tag_end - (char*)after_separator.data;
char *key = arena_alloc(arena, key_length + 1);
substr_clone((char*)after_separator.data, key, key_start, key_length);
key[key_length] = '\0';
char *new_text = arena_repstr(arena, current_text,
(size_t)opening_tag_start - 1,
close_tag + close_tag_patern_length - opening_tag_start + 2,
replacement);
// Create pattern for closing tag
char *close_tag_pattern = arena_alloc(arena, start_slice.len + key_length + 3); // +3 for "{{" and "}}"
snprintf(close_tag_pattern, start_slice.len + key_length + 3,
"{{%s%s}}", prefix_end, key);
*text_ptr = new_text;
// Find closing tag
size_t after_opening_end = (opening_tag_end - (char*)after_separator.data) + 2;
Slice after_opening_slice = slice_subslice(after_separator, after_opening_end,
after_separator.len - after_opening_end);
// Find the exact closing tag by checking for complete tag pattern
char *close_tag = NULL;
char *search_start = (char*)after_opening_slice.data;
while ((search_start = strstr(search_start, "{{")) != NULL) {
if (strncmp(search_start, close_tag_pattern, strlen(close_tag_pattern)) == 0) {
close_tag = search_start;
break;
}
search_start += 2; // Move past the "{{" we found
}
if (!close_tag) {
raise_exception("Malformed template: missing loop end for key %s", key);
exit(1);
}
// Get array from context
Json *arr = eval_object(arena, context, key);
if (arr && arr->type == JSON_ARRAY) {
// Count array elements
size_t elem_count = 0;
for (Json *e = arr->child; e; e = e->next) elem_count++;
// Allocate memory for replacement
char *replacement = arena_alloc(arena, MEM_KiB * elem_count);
size_t replacement_offset = 0;
// Extract template block
size_t block_start = after_opening_end;
size_t block_length = (close_tag - (char*)after_opening_slice.data);
char *block_buff = arena_alloc(arena, block_length + 1);
substr_clone((char*)after_opening_slice.data, block_buff, block_start, block_length);
block_buff[block_length] = '\0';
// Process each array element
for (Json *elem = arr->child; elem; elem = elem->next) {
char *block = arena_strdup(arena, block_buff);
char *prefix = arena_alloc(arena, element_name_length + 2);
snprintf(prefix, element_name_length + 2, "%s.", element_name);
hmpl_render_interpolation_tags(arena, &block, context, prefix);
raise_trace("block after: %s", block);
size_t block_len = strlen(block);
memcpy(replacement + replacement_offset, block, block_len);
replacement_offset += block_len;
}
replacement[replacement_offset] = '\0';
raise_trace("replacement: %s", replacement);
// Calculate replacement positions
size_t replace_start = start_index;
size_t replace_length = (close_tag - (char*)after_opening_slice.data) +
start_slice.len + key_length + 2;
// Perform replacement
char *new_text = arena_repstr(arena, (char*)text_slice.data, replace_start, replace_length, replacement);
*text_ptr = new_text;
// Update text slice
text_slice = slice_create(char, new_text, strlen(new_text), 0, strlen(new_text));
}
offset = start_index;
}
offset = start_index;
}
}
void hmpl_render_with_arena(Arena *arena, char **text, const Json * const context) {