MigrateBlog.tcl
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	# .tcl source scripts/Maintenance/MigrateBlog.tcl

	#
	# Dotclear -> Wordpress blog migration
	# Gets post lang from DotClear, and add relevant Wordpress post metadata for Polylang plugin.
	#

	namespace eval ::blog:: {
	set lang(fr) 31
	set lang(en) 32

	#sqladd -> sqladd7
	proc sqladd7 [info args sqladd] [string map {"sql \$sql" "sql7 \$sql"} [info body sqladd]]

	proc launch_migration {} {
	#Migration counters
	set counter_fail 0
	set counter_pass 0

	foreach row [sql7 "SELECT post_titre_url, post_lang FROM Blog.dc_post"] {
	foreach "title lang" $row {}
	set post_id [sql7 "SELECT ID FROM Dereckson_Blog.wp_posts WHERE post_name = '[sqlescape $title]'"]
	if {$post_id == ""} {
	putdebug "Can't find post: $title"
	incr counter_fail
	continue
	}
	if {$lang == "efr"} {
	putdebug "Bilingual post: $title - http://www.dereckson.be/blog/wp-admin/post.php?post=$post_id&action=edit"
	incr counter_fail
	} {
	#putdebug "$post_id -> _translations: [get_metadata $post_id $lang]"
	sqladd7 Dereckson_Blog.wp_postmeta "post_id meta_key meta_value" "$post_id _translations [get_translation_metadata $post_id $lang]"
	incr counter_pass
	}
	}
	putdebug "$counter_fail post[s $counter_fail] to manually take care of, $counter_pass post[s $counter_pass] updated."
	}

	proc get_translation_metadata {post_id lang} {
	# We need a PHP serialized array [ '$lang' => $post_id, '$altlang' => 0 ]
	if {$lang == "en"} { set altlang fr } { set altlang en }
	return "a:2:{s:2:\"$lang\";i:$post_id;s:2:\"$altlang\";i:0;}"
	}

	## Fixes translation, when every post is in English, setting the correct one in French
	proc fix_translation {} {
	# Finds posts in French (from DotCler post_lang info)
	set posts {}
	foreach row [sql7 "SELECT post_titre_url, post_lang FROM Blog.dc_post"] {
	foreach "title lang" $row {}
	set post_id [sql7 "SELECT ID FROM Dereckson_Blog.wp_posts WHERE post_name = '[sqlescape $title]'"]
	if {$post_id == ""} {
	putdebug "Can't find post: $title"
	} elseif {$lang == "fr"} {
	lappend posts $post_id
	}
	}

	# Sets metadata French in Wordpress
	batch_en2fr $posts
	}

	proc batch_en2fr {posts_id} {
	set postsUpdated 0
	foreach post_id $posts_id {
	incr postsUpdated [change_post_language $post_id $blog::lang(en) $blog::lang(fr)]
	}
	if {$postsUpdated > 0} {
	sql7 "UPDATE Dereckson_Blog.wp_term_taxonomy SET `count` = `count` - $postsUpdated WHERE term_taxonomy_id = $blog::lang(en)"
	sql7 "UPDATE Dereckson_Blog.wp_term_taxonomy SET `count` = `count` + $postsUpdated WHERE term_taxonomy_id = $blog::lang(fr)"
	}
	}

	proc en2fr {post_id} {
	change_post_language $post_id $blog::lang(en) $blog::lang(fr)
	}

	proc change_post_language {post_id oldlang newlang {updateTaxonomy 1}} {
	set isNewLang [sql7 "SELECT count(*) FROM Dereckson_Blog.wp_term_relationships WHERE object_id = $post_id AND term_taxonomy_id IN ('$newlang')"]
	if $isNewLang {
	putdebug "Post $post_id is already in this language."
	return 0
	} {
	sql7 "DELETE FROM Dereckson_Blog.wp_term_relationships WHERE object_id = $post_id AND term_taxonomy_id = $oldlang"
	sql7 "INSERT INTO Dereckson_Blog.wp_term_relationships (object_id, term_taxonomy_id) VALUES ($post_id, $newlang)"
	if {$updateTaxonomy} {
	sql7 "UPDATE Dereckson_Blog.wp_term_taxonomy SET `count` = `count` - 1 WHERE term_taxonomy_id = $blog::lang(en)"
	sql7 "UPDATE Dereckson_Blog.wp_term_taxonomy SET `count` = `count` + 1 WHERE term_taxonomy_id = $blog::lang(fr)"
	}
	return 1
	}
	}
	}

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