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+%% dbshow.sty
+%% Copyright 2022 Li Changkai <lichangkai225@qq.com>
+%
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.3
+% of this license or (at your option) any later version.
+% The latest version of this license is in
+% http://www.latex-project.org/lppl.txt
+% and version 1.3 or later is part of all distributions of LaTeX
+% version 2005/12/01 or later.
+%
+% This work has the LPPL maintenance status `maintained'.
+%
+% The Current Maintainer of this work is Li Changkai.
+%
+% This work consists of the files dbshow.sty, dbshow-doc.tex.
+\def\myfileversion{1.0}
+\def\myfiledate{2022/01/02}
+\RequirePackage{expl3, xparse}
+\RequirePackage[calc]{datetime2}
+\ProvidesExplPackage
+ {dbshow}
+ {\myfiledate}
+ {\myfileversion}
+ {database to store and show data}
+
+\DTMsetdatestyle{iso}
+
+\msg_new:nnn { dbshow } { non-existent-database } {
+ Database~'#1'~does~not~exist~\msg_line_context:.
+}
+
+% #1 database
+\cs_new:Nn \dbshow_check_database:n {
+ \prop_if_exist:cF { g__dbshow_type_map_#1 }
+ { \msg_fatal:nnn { dbshow } { non-existent-database } { #1 } }
+}
+
+\msg_new:nnn { dbshow } { non-existent-attr } {
+ Attribute~'#2'~of~database~'#1'~does~not~exist~\msg_line_context:.
+}
+
+% #1 database #2 attr
+\cs_new:Nn \dbshow_check_attr:nn {
+ \prop_if_in:cnF { g__dbshow_type_map_#1 } { #2 }
+ { \msg_fatal:nnnn { dbshow } { non-existent-attr } { #1 } { #2 } }
+}
+
+\msg_new:nnn { dbshow } { non-existent-style } {
+ Style~'#1'~of~database~'#2'~does~not~exist~\msg_line_context:.
+}
+
+% #1 style #2 database
+\cs_new:Nn \dbshow_check_style:nn {
+ \tl_if_exist:cF { g__dbshow_style_opts_#1_#2 }
+ { \msg_warning:nnnn { dbshow } { non-existent-style } { #1 } { #2 } }
+}
+
+\msg_new:nnn { dbshow } { non-existent-cond } {
+ Conditional~'#2'~of~database~'#1'~does~not~exist~\msg_line_context:.
+}
+
+% #1 database #2 cond
+\cs_new:Nn \dbshow_check_cond:nnn {
+ \tl_if_exist:cF { g__dbshow_filter_attr_#1_#2 }
+ { \msg_fatal:nnnn { dbshow } { non-existent-cond } { #1 } { #2 } }
+}
+
+\msg_new:nnn { dbshow } { non-existent-filter } {
+ Filter~'#2'~of~database~'#1'~does~not~exist~and~is~ignored~\msg_line_context:.
+}
+
+\cs_generate_variant:Nn \msg_warning:nnnn { nnnx }
+% #1 database #2 filter
+\cs_new:Nn \dbshow_check_filter:nn {
+ \seq_if_exist:cF { g__dbshow_filter_run_seq_#1_#2 } {
+ \str_if_eq:eeF { #2 } { -none- } {
+ \msg_warning:nnnx { dbshow } { non-existent-filter } { #1 } { #2 }
+ }
+ }
+}
+
+\msg_new:nnn { dbshow } { non-existent-type } {
+ Type~'#1'~does~not~exist,~the~type~of~attribute~should~be~one~of~
+ \{date,~str,~tl,~clist,~int,~fp\}~\msg_line_context:.
+}
+
+% #1 type
+\cs_new:Nn \dbshow_check_type:n {
+ \clist_if_in:NnF \dbshow_type_clist { #1 }
+ { \msg_fatal:nnn { dbshow } { non-existent-type } { #1 } }
+}
+
+% #1 count #2 content
+\msg_new:nnn { dbshow } { wrong-seperator } {
+ option~sep~should~contain~1~or~3~items~but~only~#1~items~was~given,~
+ sep~=~\{#2\}~\msg_line_context:.
+}
+
+\msg_new:nnn { dbshow } { unsupported-sort-type } {
+ unsupported~sort~type:~'#1'~\msg_line_context:.~The~type~should~be~one~of~
+ \{str,~date,~int,~fp\}.
+}
+
+\cs_new:Nn \dbshow_sep_error:nn {
+ \msg_error:nnnn { dbshow } { wrong-seperator } { #1 } { #2 }
+}
+\cs_generate_variant:Nn \dbshow_sep_error:nn { xx }
+
+\clist_const:Nn \dbshow_type_clist { date, str, tl, clist, int, fp }
+
+\prop_const_from_keyval:Nn \dbshow_new_cs_map {
+ date = str_clear_new:c,
+ str = str_clear_new:c,
+ tl = tl_gclear_new:c,
+ clist = clist_gclear_new:c,
+ int = int_gzero_new:c,
+ fp = fp_gzero_new:c
+}
+
+\prop_const_from_keyval:Nn \dbshow_set_cs_map {
+ date = str_gset:cn,
+ str = str_gset:cn,
+ tl = tl_gset:cn,
+ clist = clist_gset:cn,
+ int = int_gset:cn,
+ fp = fp_gset:cn
+}
+
+\prop_const_from_keyval:Nn \dbshow_use_cs_map {
+ date = str_use:c,
+ str = str_use:c,
+ tl = tl_use:c,
+ clist = dbshow_clist_use:c,
+ int = int_use:c,
+ fp = fp_use:c
+}
+
+\prop_const_from_keyval:Nn \dbshow_default_value {
+ date = \Today,
+ str = ,
+ tl = ,
+ clist = ,
+ int = 0,
+ fp = 0
+}
+
+\newcount\l_dbshow_date_diff
+
+% #1 database #2 attr #3 type #4 default value
+\cs_new:Npn \dbshow_process_default_value:w #1|#2=#3|#4\scan_stop {
+ \dbshow_check_type:n { #3 }
+ \prop_gput:cxx { g__dbshow_type_map_#1 } { #2 } { #3 }
+ \prop_gput:cxx { g__dbshow_default_map_#1 } { #2 } { #4 }
+}
+
+\cs_new_protected:Nn \dbshow_process_type_map:n {
+ \prop_gclear_new:c { g__dbshow_default_map_#1 }
+ \prop_map_inline:cn { g__dbshow_type_map_#1 } {
+ \str_if_in:nnTF { ##2 } { | }
+ { \dbshow_process_default_value:w #1|##1=##2\scan_stop }
+ {
+ \prop_get:NnN \dbshow_default_value { ##2 } \l_tmp_default
+ \dbshow_process_default_value:w #1|##1=##2|\l_tmp_default\scan_stop
+ }
+ }
+}
+
+% #1 database_name, #2 clist, attr=type
+\cs_new_protected:Nn \dbshow_database_new:nn {
+ \int_gzero_new:c { g__dbshow_counter_#1 }
+ \prop_gset_from_keyval:cn { g__dbshow_type_map_#1 } { #2 }
+}
+
+% #1 database_name, #2 clist
+\cs_new_protected:Nn \dbshow_database_new_append:nn {
+ \int_gzero_new:c { g__dbshow_counter_#1 }
+ \prop_if_exist:cF { g__dbshow_type_map_#1 }
+ { \prop_new:c { g__dbshow_type_map_#1 } }
+ \prop_gset_from_keyval:Nn \l_tmpa_prop { #2 }
+ \prop_concat:ccc { g__dbshow_type_map_#1 } { g__dbshow_type_map_#1 } { l_tmpa_prop }
+}
+
+% #1 database_name, #2 database inherit from #3 clist
+\cs_new_protected:Nn \dbshow_database_new_inherit:nnn {
+ \dbshow_check_database:n { #2 }
+ \str_if_eq:nnTF { #1 } { #2 } {
+ \dbshow_database_new_append:nn { #1 } { #3 }
+ } {
+ \int_gzero_new:c { g__dbshow_counter_#1 }
+ \prop_gset_from_keyval:cn { g__dbshow_type_map_#1 } { #3 }
+ \prop_concat:ccc { g__dbshow_type_map_#1 } { g__dbshow_type_map_#2 } { g__dbshow_type_map_#1 }
+ }
+}
+
+% #1 database_name, #2 attr
+\cs_new:Nn \dbshow_get_type:nn {
+ \prop_item:cn { g__dbshow_type_map_#1 } { #2 }
+}
+
+% #1 database_name
+\cs_new:Nn \dbshow_get_counter:n {
+ \int_use:c { g__dbshow_counter_#1 }
+}
+
+% #1 database_name
+\cs_new:Nn \dbshow_step_counter:n {
+ \int_gincr:c { g__dbshow_counter_#1 }
+}
+
+% #1 database #2 attr #3 content
+\cs_new:Nn \dbshow_save_data:nnn {
+ \dbshow_check_attr:nn { #1 } { #2 }
+ \str_set:Nx \l_tmp_type { \dbshow_get_type:nn { #1 } { #2 } }
+ \prop_get:NVN \dbshow_new_cs_map \l_tmp_type \l_tmp_cs_new
+ \prop_get:NVN \dbshow_set_cs_map \l_tmp_type \l_tmp_cs_set
+ \use:c { \l_tmp_cs_new }
+ { g__dbshow_data_#1_#2_\dbshow_get_counter:n { #1 } }
+ \use:c { \l_tmp_cs_set }
+ { g__dbshow_data_#1_#2_\dbshow_get_counter:n { #1 } } { #3 }
+}
+\cs_generate_variant:Nn \dbshow_save_data:nnn { nnx }
+
+\cs_new:Nn \dbshow_clist_use:N {
+ \clist_clear:N \l_tmpa_clist
+
+ \clist_map_inline:Nn #1 {
+ \prg_set_conditional:Nnn \dbshow_clist_item_if_empty: { T, F, TF } {
+ \tl_if_empty:nTF { ##1 }
+ { \prg_return_true: }
+ { \prg_return_false: }
+ }
+ \cs_set_eq:NN \dbClistItemIfEmptyT\dbshow_clist_item_if_empty:T
+ \cs_set_eq:NN \dbClistItemIfEmptyF\dbshow_clist_item_if_empty:F
+ \cs_set_eq:NN \dbClistItemIfEmptyTF\dbshow_clist_item_if_empty:TF
+
+ \clist_put_right:Nn \l_tmpa_clist {
+ \l_style_item_before_code
+ ##1
+ \l_style_item_after_code
+ }
+ }
+
+ \tl_clear:N \l_tmpa_tl
+ \clist_map_inline:Nn \l_style_sep_clist {
+ \tl_put_right:Nn \l_tmpa_tl { { ##1 } }
+ }
+
+ \int_set:Nn \l_tmpa_int { \clist_count:N \l_style_sep_clist }
+ \int_case:nnF { \l_tmpa_int } {
+ { 1 } {
+ \exp_after:wN \clist_use:Nn \exp_after:wN \l_tmpa_clist \l_tmpa_tl
+ }
+ { 3 } {
+ \exp_after:wN \clist_use:Nnnn \exp_after:wN \l_tmpa_clist \l_tmpa_tl
+ }
+ }
+ {
+ \dbshow_sep_error:xx
+ { \int_use:N \l_tmpa_int }
+ { \clist_use:Nn \l_style_sep_clist { , } }
+ }
+}
+\cs_generate_variant:Nn \dbshow_clist_use:N { c }
+
+% #1 database #2 attr #3 index
+\cs_new:Nn \dbshow_use_data:nnn {
+ \str_set:Nx \l_tmp_type { \dbshow_get_type:nn { #1 } { #2 } }
+ \prop_get:NVN \dbshow_use_cs_map \l_tmp_type \l_tmp_cs
+ \use:c { \l_tmp_cs } { g__dbshow_data_#1_#2_#3 }
+}
+
+% #1 database
+\cs_new_protected:Nn \dbshow_set_database_keys:n {
+ \prop_map_inline:cn { g__dbshow_type_map_#1 } {
+ \keys_define:nn { dbshow/database/#1 } {
+ ##1 .code:n = \dbshow_save_data:nnn { #1 } { ##1 } { ####1 },
+ }
+ }
+}
+
+% #1 append or not #2 inherit #3 database #4 attrs
+\NewDocumentCommand { \dbNewDatabase } { s o m m } {
+ \IfNoValueTF { #2 } {
+ \IfBooleanTF { #1 }
+ { \dbshow_database_new_append:nn { #3 } { #4 } }
+ { \dbshow_database_new:nn { #3 } { #4 } }
+ } { \dbshow_database_new_inherit:nnn { #3 } { #2 } { #4 } }
+ \dbshow_database_new_append:nn { #3 } { id=int }
+ \dbshow_process_type_map:n { #3 }
+ \dbshow_set_database_keys:n { #3 }
+ \dbNewStyle{default}{#3}{}
+}
+
+% #1 database #2 attr-content map
+\NewDocumentEnvironment { dbitem } { m O{} +b } {
+ \dbshow_check_database:n { #1 }
+ \dbshow_step_counter:n { #1 }
+ \cs_set:Nn \dbshow_set_default:nn {
+ \dbshow_save_data:nnx { #1 } { ##1 } {
+ \prop_item:cn { g__dbshow_default_map_#1 } { ##1 }
+ }
+ }
+ \prop_map_function:cN { g__dbshow_type_map_#1 } \dbshow_set_default:nn
+ \dbshow_save_data:nnx { #1 } { id } { \dbshow_get_counter:n { #1 } }
+ \keys_set:nn { dbshow/database/#1 } { #2 }
+ % #2 attr #3 content
+ \NewDocumentCommand { \dbsave } { m m } {
+ \dbshow_save_data:nnn { #1 } { ##1 } { ##2 }
+ }
+} { #3 }
+
+\cs_new:Nn \dbshow_if_int: {
+ \int_compare:nTF { \l_dbshow_rela }
+ { \dbshow_set_true: }
+ { \dbshow_set_false: }
+}
+
+\cs_new:Nn \dbshow_if_fp: {
+ \fp_compare:nTF { \l_dbshow_rela }
+ { \dbshow_set_true: }
+ { \dbshow_set_false: }
+}
+
+% star: all in
+% no star: one in
+\cs_new:Nn \dbshow_if_clist: {
+ \bool_if:NTF \l_star_bool { % and
+ \dbshow_set_true:
+ \exp_args:Nx
+ \clist_map_inline:nn { \l_dbshow_rela } {
+ \clist_if_in:NnF \dbval { ##1 } {
+ \dbshow_set_false:
+ \clist_map_break:
+ }
+ }
+ }
+ { % or
+ \dbshow_set_false:
+ \exp_args:Nx
+ \clist_map_inline:nn { \l_dbshow_rela } {
+ \clist_if_in:NnT \dbval { ##1 } {
+ \dbshow_set_true:
+ \clist_map_break:
+ }
+ }
+ }
+}
+
+% star: match full
+% no star: match part
+\cs_new:Nn \dbshow_if_str: {
+ \bool_if:NT \l_star_bool {
+ \tl_put_left:Nn \l_dbshow_rela { \A }
+ \tl_put_right:Nn \l_dbshow_rela { \Z }
+ }
+ \regex_match:VVTF \l_dbshow_rela \dbval
+ { \dbshow_set_true: }
+ { \dbshow_set_false: }
+}
+\cs_set_eq:NN \dbshow_if_tl: \dbshow_if_str:
+
+\cs_new:Npn \dbshow_parse_date:w #1|#2\dbshow_stop {
+ \clist_set_eq:Nc \l_point_clist { g__review_points_#1 }
+ \tl_set:Nn \l_date_tl { #2 }
+}
+
+\cs_new:Nn \dbshow_if_date: {
+ \bool_if:NTF \l_star_bool {
+ \regex_extract_once:nVNF { \A(.*)([!<>=]+)(.*)\Z }
+ \l_dbshow_rela \l_tmpa_seq { }
+ \exp_args:Nnx \DTMsavedate{day1}{ \seq_item:Nn \l_tmpa_seq { 2 } }
+ \tl_set:Nx \l_rela { \seq_item:Nn \l_tmpa_seq { 3 } }
+ \exp_args:Nnx \DTMsavedate{day2}{ \seq_item:Nn \l_tmpa_seq { 4 } }
+ \DTMsaveddatediff{day1}{day2}{\l_dbshow_date_diff}% specious blank
+ \exp_args:NnV \int_compare:nNnTF
+ { \the\l_dbshow_date_diff } \l_rela { 0 }
+ { \dbshow_set_true: }
+ { \dbshow_set_false: }
+ }
+ {
+ \exp_after:wN \dbshow_parse_date:w \l_dbshow_rela\dbshow_stop
+ \exp_args:Nnx \DTMsavedate{day1}{ \l_date_tl }
+ \exp_args:Nnx \DTMsavedate{day2}{ \dbval }
+ \DTMsaveddatediff{day1}{day2}{\l_dbshow_date_diff}% specious blank
+ \clist_if_in:NoTF \l_point_clist { \the\l_dbshow_date_diff }
+ { \dbshow_set_true: }
+ { \dbshow_set_false: }
+ }
+}
+
+\cs_generate_variant:Nn \prop_get:NnN { cVN }
+\prg_generate_conditional_variant:Nnn \regex_extract_once:nnN { nVN } { T, F, TF, p }
+\prg_generate_conditional_variant:Nnn \regex_match:nn { VV } { T, F, TF, p }
+% #1 database name #2 cond name #3 index
+\cs_set:Nn \dbshow_if:nnn {
+ \tl_set_eq:Nc \l_dbshow_attr { g__dbshow_filter_attr_#1_#2 }
+ \tl_set_eq:Nc \l_dbshow_rela { g__dbshow_filter_rela_#1_#2 }
+ \cs_set_eq:Nc \dbval { g__dbshow_data_#1_\l_dbshow_attr _#3 }
+ \cs_set:Nn \dbshow_set_true:
+ { \bool_gset_true:c { g__dbshow_filter_bool_#1_#2 } }
+ \cs_set:Nn \dbshow_set_false:
+ { \bool_gset_false:c { g__dbshow_filter_bool_#1_#2 } }
+ \prop_get:cVN { g__dbshow_type_map_#1 } \l_dbshow_attr \l_tmp_type
+ \bool_set_eq:Nc \l_star_bool { g__dbshow_cond_star_#1_#2 }
+ \use:c { dbshow_if_\l_tmp_type : }
+}
+
+% 将cond->attr, cond->rela, cond->bool关联起来
+% #1 database name #2 cond name #3 attr #4 rela #5 star
+\cs_new_protected:Nn \dbshow_new_conditional:nnnnn {
+ \tl_gset:cn { g__dbshow_filter_attr_#1_#2 } { #3 }
+ \tl_gset:cn { g__dbshow_filter_rela_#1_#2 } { #4 }
+ \bool_if_exist:cF { g__dbshow_filter_bool_#1_#2 }
+ { \bool_new:c { g__dbshow_filter_bool_#1_#2 } }
+ \bool_if_exist:cF { g__dbshow_cond_star_#1_#2 }
+ { \bool_new:c { g__dbshow_cond_star_#1_#2 } }
+ \IfBooleanTF { #5 }
+ { \bool_gset_true:c { g__dbshow_cond_star_#1_#2 } }
+ { \bool_gset_false:c { g__dbshow_cond_star_#1_#2 } }
+ \cs_gset:cn { g__dbshow_filter_cs_#1_#2:n } {
+ \dbshow_if:nnn { #1 } { #2 } { ##1 }
+ }
+ \seq_gput_right:cn { g__dbshow_cond_list_#1 } { #2 }
+}
+
+% 将组合条件cond1, cond2, ..., 替换成cond1->bool, cond2->bool, ...
+% #1 database name #2 filter name #3 filters
+\cs_new_protected:Nn \dbshow_combine_conditional:nnn {
+ \tl_gset_eq:cN { g__dbshow_filter_bool_tl_#1_#2 } \c_true_bool
+ \seq_gclear_new:c { g__dbshow_filter_run_seq_#1_#2 }
+ \regex_extract_all:nnN { \w+ } { #3 } \l_tmpa_seq
+ \seq_map_inline:Nn \l_tmpa_seq {
+ % ##1 cond name
+ \seq_if_in:cnT { g__dbshow_cond_list_#1 } { ##1 } {
+ \seq_gput_right:cn { g__dbshow_filter_run_seq_#1_#2 }
+ { g__dbshow_filter_cs_#1_##1:n }
+ }
+ }
+ \tl_set:Nn \l_tmpa_tl { #3 }
+ \regex_replace_all:nnN
+ { \w+ } { \c{ g__dbshow_filter_bool_#1_\0 } }
+ \l_tmpa_tl
+ \tl_gset_eq:cN { g__dbshow_filter_bool_tl_#1_#2 } \l_tmpa_tl
+}
+
+\cs_generate_variant:Nn \regex_replace_all:nnN { nnc }
+% #1 database #2 content
+\NewDocumentEnvironment { dbFilters } { m +b } {
+ \seq_gclear_new:c { g__dbshow_cond_list_#1 }
+ % #1 star #2 cond name #3 attr #4 rela
+ \DeclareDocumentCommand { \dbNewConditional } { s m m m } {
+ \dbshow_new_conditional:nnnnn
+ { #1 } { ##2 } { ##3 } { ##4 } { ##1 }
+ }
+ % ##1 filter name ##2 filters ##3 info
+ \DeclareDocumentCommand { \dbCombineConditionals } { m m O{} } {
+ \tl_gset:cn { g__dbshow_filter_info_#1_##1 } { ##3 }
+ \dbshow_combine_conditional:nnn { #1 } { ##1 } { ##2 }
+ }
+ #2
+} { }
+
+% #1 name #2 points
+\NewDocumentCommand { \dbNewReviewPoints } { m m } {
+ \clist_set:cn { g__review_points_#1 } { #2 }
+}
+
+% #1 style name #2 database name #3 attr
+\cs_new_protected:Nn \dbshow_new_attr_style:nnn {
+ \dbshow_check_attr:nn { #2 } { #3 }
+ \keys_define:nn { dbshow/style/#1/#3 } {
+ before-code .tl_gset:c = { g__dbshow_style_before_#1_#2_#3 },
+ before-code .initial:n = ,
+ after-code .tl_gset:c = { g__dbshow_style_after_#1_#2_#3 },
+ after-code .initial:n = ,
+ }
+ \prop_get:cnN { g__dbshow_type_map_#2 } { #3 } \l_tmp_type
+ \str_if_eq:eeT { \l_tmp_type } { clist } {
+ \keys_define:nn { dbshow/style/#1/#3 } {
+ sep .clist_gset:c = { g__dbshow_style_sep_#1_#2_#3 },
+ sep .initial:n = { { ,~ } },
+ item-before-code .tl_gset:c = { g__dbshow_style_item_before_#1_#2_#3 },
+ item-before-code .initial:n = ,
+ item-after-code .tl_gset:c = { g__dbshow_style_item_after_#1_#2_#3 },
+ item-after-code .initial:n = ,
+ }
+ }
+}
+
+% #1 style name #2 database name
+\cs_new_protected:Nn \dbshow_new_database_style:nn {
+ \dbshow_check_database:n { #2 }
+ \keys_define:nn { dbshow/style/#1 } {
+ filter .tl_gset:c = { g__dbshow_filter_#1_#2 },
+ filter .initial:n = -none-,
+ sort .clist_gset:c = { g__dbshow_sort_#1_#2 },
+ before-code .tl_gset:c = { g__dbshow_style_before_#1_#2 },
+ before-code .initial:n = ,
+ item-code .tl_gset:c = { g__dbshow_style_database_item_#1_#2 },
+ item-code .initial:n = ,
+ after-code .tl_gset:c = { g__dbshow_style_after_#1_#2 },
+ after-code .initial:n = ,
+ }
+ \prop_map_inline:cn { g__dbshow_type_map_#2 } {
+ \dbshow_new_attr_style:nnn { #1 } { #2 } { ##1 }
+ }
+}
+
+% #1 base style #2 style #3 database #4 opt
+\NewDocumentCommand { \dbNewStyle } { o m m +m } {
+ \tl_gset:cn { g__dbshow_style_opts_#2_#3 } { #4, }
+ \IfValueT { #1 } {
+ \tl_gclear:N \g_tmpa_tl
+ \clist_map_inline:nn { #1 } {
+ \dbshow_check_style:nn { ##1 } { #3 }
+ \tl_if_exist:cT { g__dbshow_style_opts_##1_#3 } {
+ \tl_gconcat:ccc { g_tmpa_tl }
+ { g_tmpa_tl } { g__dbshow_style_opts_##1_#3 }
+ }
+ }
+ \tl_gconcat:ccc { g__dbshow_style_opts_#2_#3 }
+ { g_tmpa_tl } { g__dbshow_style_opts_#2_#3 }
+ }
+ \dbshow_new_database_style:nn { #2 } { #3 }
+ \exp_args:Nnv
+ \keys_set:nn { dbshow/style/#2 } { g__dbshow_style_opts_#2_#3 }
+}
+
+\cs_new:Npn \dbshow_sort_parse_star:w #1* {
+ \tl_set:Nx \l_op_same { > }
+ \tl_set:Nx \l_op_swap { < }
+ \str_set:Nn \l_tmpa_str { #1 }
+}
+
+% #1 database #2 index #3 style
+\cs_new:Nn \dbshow_sort:nNn {
+ \int_set:Nn \l_tmpb_int { \clist_count:c { g__dbshow_sort_#3_#1 } }
+ \clist_sort:Nn #2 {
+ \int_zero:N \l_tmpa_int
+ \cs_set:Nn \dbshow_sort_single: {
+ \int_incr:N \l_tmpa_int
+ \str_set:Nx \l_tmpa_str
+ { \clist_item:cn { g__dbshow_sort_#3_#1 } { \l_tmpa_int } }
+ \str_if_in:NnTF \l_tmpa_str { * } {
+ \exp_after:wN \dbshow_sort_parse_star:w \l_tmpa_str
+ }
+ {
+ \tl_set:Nx \l_op_same { < }
+ \tl_set:Nx \l_op_swap { > }
+ }
+ \exp_args:NnV \dbshow_check_attr:nn { #1 } \l_tmpa_str
+
+ \cs_set_eq:Nc \l_tmpa_tl { g__dbshow_data_#1_\l_tmpa_str _##1 }
+ \cs_set_eq:Nc \l_tmpb_tl { g__dbshow_data_#1_\l_tmpa_str _##2 }
+
+ \prop_get:cVN { g__dbshow_type_map_#1 } \l_tmpa_str \l_tmp_type
+ \clist_if_in:nVF { str, int, date, fp } \l_tmp_type {
+ \msg_error:nnx { dbshow } { unsupported-sort-type } { \l_tmp_type }
+ }
+ \str_if_eq:eeT { \l_tmp_type } { date }
+ { \str_set:Nn \l_tmp_type { str } }
+ \cs_set_eq:Nc \dbshow_compare { \l_tmp_type _compare:nNnTF }
+
+ \exp_args:NnV
+ \dbshow_compare { \l_tmpa_tl } \l_op_same { \l_tmpb_tl }
+ { \sort_return_same: }
+ {
+ \exp_args:NnV
+ \dbshow_compare { \l_tmpa_tl } \l_op_swap { \l_tmpb_tl }
+ { \sort_return_swapped: }
+ {
+ \int_compare:nTF { \l_tmpa_int = \l_tmpb_int }
+ { \sort_return_same: }
+ { \dbshow_sort_single: }
+ }
+ }
+ }
+ \dbshow_sort_single:
+ }
+}
+
+% #1 style #2 database #3 filter
+\cs_new_protected:Nn \dbshow_init_iterator:nnn {
+ \tl_set:Nn \dbDatabase { #2 }
+ \tl_set:Nx \dbFilterName { #3 }
+ \tl_set_eq:Nc \dbFilterInfo { g__dbshow_filter_info_#2_#3 }
+
+ \clist_clear_new:N \l_index
+ %% run filters
+ % ##1 index
+ \cs_set:Nn \dbshow_filter:n {
+ \seq_if_exist:cTF { g__dbshow_filter_run_seq_#2_#3 } {
+ \seq_map_inline:cn { g__dbshow_filter_run_seq_#2_#3 } {
+ \use:c { ####1 } { ##1 }
+ }
+ \exp_args:Nv
+ \bool_if:nT { g__dbshow_filter_bool_tl_#2_#3 }
+ { \clist_put_right:Nn \l_index { ##1 } }
+ } { \clist_put_right:Nn \l_index { ##1 } }
+ }
+ \int_step_function:nN { \dbshow_get_counter:n { #2 } } \dbshow_filter:n
+ \clist_if_empty:cF { g__dbshow_sort_#1_#2 }
+ { \dbshow_sort:nNn { #2 } \l_index { #1 } }
+
+ % ##1 index
+ \cs_set:Nn \dbshow_iter:n {
+ % ####1 attr
+ \cs_set:Npn \dbuse ####1 {
+ \dbshow_check_attr:nn { #2 } { ####1 }
+ \clist_set_eq:Nc \l_style_sep_clist
+ { g__dbshow_style_sep_#1_#2_####1 }
+ \tl_set_eq:Nc \l_style_item_before_code
+ { g__dbshow_style_item_before_#1_#2_####1 }
+ \tl_set_eq:Nc \l_style_item_after_code
+ { g__dbshow_style_item_after_#1_#2_####1 }
+ \tl_set:Nn \dbIndex { ##1 }
+
+ \prop_get:cnN { g__dbshow_type_map_#2 } { ####1 } \l_tmp_type
+ % \tl_show:N \l_tmp_type
+ \str_if_eq:eeT { \l_tmp_type } { date }
+ { \tl_set:Nn \l_tmp_type { str } }
+ \prg_set_conditional:Nnn \dbshow_item_if_empty: { T, F, TF } {
+ \use:c { \l_tmp_type _if_empty:cTF }
+ { g__dbshow_data_#2_####1_##1 }
+ { \prg_return_true: }
+ { \prg_return_false: }
+ }
+ \cs_set_eq:NN \dbItemIfEmptyT\dbshow_item_if_empty:T
+ \cs_set_eq:NN \dbItemIfEmptyF\dbshow_item_if_empty:F
+ \cs_set_eq:NN \dbItemIfEmptyTF\dbshow_item_if_empty:TF
+
+ \tl_use:c { g__dbshow_style_before_#1_#2_####1 }
+ \dbshow_use_data:nnn { #2 } { ####1 } { ##1 }
+ \tl_use:c { g__dbshow_style_after_#1_#2_####1 }
+ }
+ \tl_use:c { g__dbshow_style_database_item_#1_#2 }
+ }
+ \prg_set_conditional:Nnn \dbshow_if_empty: { T, F, TF } {
+ \clist_if_empty:NTF \l_index
+ { \prg_return_true: }
+ { \prg_return_false: }
+ }
+ \cs_set_eq:NN \dbIfEmptyT\dbshow_if_empty:T
+ \cs_set_eq:NN \dbIfEmptyF\dbshow_if_empty:F
+ \cs_set_eq:NN \dbIfEmptyTF\dbshow_if_empty:TF
+
+ \tl_use:c { g__dbshow_style_before_#1_#2 }
+ \clist_map_function:NN \l_index \dbshow_iter:n
+ \tl_use:c { g__dbshow_style_after_#1_#2 }
+}
+
+% #1 style #2 database
+\NewDocumentCommand { \dbshow } { m m } {
+ \dbshow_check_database:n { #2 }
+ \tl_set_eq:Nc \l_dbshow_filter { g__dbshow_filter_#1_#2 }
+ \dbshow_check_filter:nn { #2 } { \l_dbshow_filter }
+ \dbshow_init_iterator:nnn { #1 } { #2 } { \l_dbshow_filter }
+}
+
+\endinput