1 This is a description of the database interface for PhpWiki. Regardless
2 of what kind of data store is used (RDBMS, DBM files, flat text files)
3 you should be able to write a library that supports that data store.
7 * While most functions specify a "db reference" as the first value
8 passed in, this can be any kind of data type that your functions
9 know about. For example, in the DBM implementation this is a hash of
10 integers that refer to open database files, but in the MySQL
11 version it's an associative array that contains the DB information.
13 * Functions that return the page data must return a hash (associative
14 array) of all the data, where 'content' == the text of the page in Wiki
15 markup, 'version' is an integer representing the version, 'author'
16 the IP address or host name of the previous author and so on. See
17 the next paragraph for a precise description.
19 * The data structure. This is commonly named $pagehash in the source
20 code; it's an associative array with values that are integers,
21 strings and arrays (i.e. a heterogenous data structure). Here's a
26 content => array (where each element is a line of the page),
27 created => integer (a number in Unix time since the Epoch),
29 lastmodified => integer (also Unix time),
37 takes: a string, the name of the database
38 returns: a reference to the database (a handle)
42 takes: a reference to the database (handle)
43 returns: the value of the close. For databases with persistent
44 connections, this doesn't return anything.
47 MakeDBHash($pagename, $pagehash)
48 takes: page name, page array
49 returns: an encoded version of the $pagehash suitable for
50 insertion into the data store. This is an internal helper
51 function used mainly for the RDBMSs.
54 takes: an array that came from the database
55 returns: the $pagehash data structure used by the
56 application. This function undoes what MakeDBHash does.
58 RetrievePage($dbi, $pagename, $pagestore)
59 takes: db reference, string which is the name of a page, and a
60 string indicating which store to fetch the page from (live or archive).
61 returns: a PHP associative array containing the page data
62 (text, version, author, etc)
65 InsertPage($dbi, $pagename, $pagehash)
66 takes: db reference, page name (string), associative array
68 returns: nothing (hmm. It should probably return true/false)
70 SaveCopyToArchive($dbi, $pagename, $pagehash)
71 Similar to InsertPage but for handling the archive store. The
72 goal here was to separate the two (live db and archive db) in
73 case there were different storage formats (for example, the
74 archive might only store diffs of the pages). However this is
75 not the case in the implementations.
77 IsWikiPage($dbi, $pagename)
78 takes: db reference, string containing page name
79 returns: true or false, if the page already exists in the live db.
81 IsInArchive($dbi, $pagename)
82 takes: db reference, string containing page name
83 returns: true or false, if the page already exists in the archive.
85 InitTitleSearch($dbi, $search)
86 takes: db reference, search string
87 returns: a handle to identify the query and the current position
88 within the result set.
90 RemovePage($dbi, $pagename)
91 takes: db reference, name of the page
93 This deletes a page from both the live and archive page stores.
95 TitleSearchNextMatch($dbi, &$pos)
96 takes: db reference, reference to a hash created by
98 returns: the next page name that contains a match to the search term
99 (advances $pos to next result field as well)
101 MakeSQLSearchClause($search, $column)
102 takes: a search string, column name
103 returns: a SQL query string suitable for a database query
105 InitFullSearch($dbi, $search)
106 takes: db reference, string containing search term
107 returns: similar to InitTitleSearch: a handle to identify the
108 query and the current position within the result set.
111 FullSearchNextMatch($dbi, &$pos)
112 takes: db reference, reference to a hash created by
114 returns: an associative array, where:
115 'name' -- contains the page name
116 'hash' -- contains the hash of the page data
117 (advances $pos to next result field as well)
120 IncreaseHitCount($dbi, $pagename)
121 takes: db reference, string (name of a page)
122 returns: nothing (MySQL implementation returns the last result
123 set but it is not used by the caller)
126 GetHitCount($dbi, $pagename)
127 takes: db reference, string (page name)
128 returns: an integer, the number of hits the page has received
131 InitMostPopular($dbi, $limit)
132 takes: a db reference and an integer, which is the limit of the
133 number of pages you want returned.
134 returns: the result set from the query
137 MostPopularNextMatch($dbi, $res)
138 takes: db reference, the result set returned by InitMostPopular
139 returns: the next row from the result set, as a PHP array type
141 GetAllWikiPageNames($dbi)
143 returns: an array containing all page names
145 GetWikiPageLinks($dbi, $pagename)
146 takes: db reference, page name
147 returns: a two-dimensional array containing outbound links
148 ordered by score desc ('out'); inbound links ordered by score
149 desc ('in'); inbound or outbound links ordered by most number of
150 page views ('popular').
152 SetWikiPageLinks($dbi, $pagename, $linklist)
153 takes: db reference, page name, list of pages linking to this
155 This deletes the existing list of linking pages and inserts all
156 the page names in $linklist.
158 $Id: DBLIB.txt,v 1.9 2001-02-17 05:35:56 dairiki Exp $