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Diffstat (limited to 'app/acf_www-controller.lua')
| -rw-r--r-- | app/acf_www-controller.lua | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/app/acf_www-controller.lua b/app/acf_www-controller.lua new file mode 100644 index 0000000..742533a --- /dev/null +++ b/app/acf_www-controller.lua @@ -0,0 +1,202 @@ +--[[ Code for the Alpine Configuration WEB framework + Written for Alpine Configuration Framework (ACF) -- see www.alpinelinux.org + Copyright (C) 2007 Nathan Angelacos + Licensed under the terms of GPL2 + ]]-- +module(..., package.seeall) + +-- We use the parent exception handler in a last-case situation +local parent_exception_handler + +mvc = {} +mvc.on_load = function (self, parent) + + -- Make sure we have some kind of sane defaults for libdir and sessiondir + self.conf.libdir = self.conf.libdir or ( self.conf.appdir .. "/lib/" ) + self.conf.sessiondir = self.conf.sessiondir or "/tmp/" + self.conf.appuri = "http://" .. ENV.HTTP_HOST .. ENV.SCRIPT_NAME + self.conf.default_controller = "welcome" + self.clientdata = FORM + + + parent_exception_handler = parent.exception_handler + + -- this sets the package path for us and our children + package.path= self.conf.libdir .. "?.lua;" .. package.path + + self.session = {} + local x=require("session") + if FORM.sessionid then + local timestamp + timestamp , self.session = x.load_session(self.conf.sessiondir , FORM.sessionid) + self.session.id = FORM.sessionid + else + self.session.id = nil + end + logit ("acf_www-controller mvc.on_load activated" ) +end + +mvc.pre_exec = function () + logit ("acf_www-controller mvc.pre_exec activated") +end + +mvc.post_exec = function () + logit ("acf_www-controller mvc.post_exec activated") +end + + +-- look for a template +-- ctlr-action-view, then ctlr-view, then action-view, then view + +find_template = function ( appdir, prefix, controller, action, viewtype ) + local targets = { + appdir .. prefix .. "template-" .. controller .. "-" .. + action .. "-" .. viewtype .. ".lsp", + appdir .. prefix .. "template-" .. controller .. "-" .. + viewtype .. ".lsp", + appdir .. prefix .. "template-" .. action .. "-" .. + viewtype .. ".lsp", + appdir .. prefix .. "template-" .. viewtype .. ".lsp" + } + local file + for k,v in pairs(targets) do + file = io.open (v) + if file then + io.close (file) + return v + end + end + -- not found, so try one level higher + if prefix == "" then -- already at the top level - fail + return false + end + prefix = dirname (prefix) + return find_template ( appdir, prefix, controller, action, viewtype ) +end + + + +-- Overload the MVC's view resolver with our own + +view_resolver = function(self) + local file + local viewname + local viewtype = self.conf.viewtype or "html" + local names = { self.conf.appdir .. self.conf.prefix .. self.conf.controller .. + "-" .. self.conf.action .. "-" .. viewtype .. ".lsp", + self.conf.appdir .. self.conf.prefix .. self.conf.controller .. + "-" .. viewtype .. ".lsp" } + + + -- FIXME: MVC doesn't have a way to call a function after the controller is run + -- so we serialize the session in the view resolver. MVC probably should have + -- a postinit or postrun method... + if self.session.id then + local x = require("session") + x.save_session(self.conf.sessiondir, self.session.id, self.session) + x=nil + end + + -- search for template + local template = find_template ( self.conf.appdir, self.conf.prefix, + self.conf.controller, self.conf.action, "html") + + -- search for view + for i,filename in ipairs (names) do + file = io.open(filename) + if file then + file:close() + viewname = filename + break + end + end + + -- We have a template + if template then + -- *************************************************** + -- This is how to call another controller (APP or self + -- can be used... m will contain worker and model, + -- with conf, and other "missing" parts pointing back + -- to APP or self + -- *************************************************** + local m = self:new("alpine-baselayout/hostname") + local h = m.worker.read(m) + + local pageinfo = { viewfile = viewname, + controller = m.conf.controller, + -- ^^^ see.. m.conf doesnt exist - but it works + action = self.conf.action, + hostname = h.hostname.value, + prefix = self.conf.prefix, + script = self.conf.appuri + } + + -- Build the menu table + m=require("menubuilder") + local menu = m.get_menuitems(self.conf.appdir) + + -- A quick hack + submenu = {} + for k,v in pairs ( self.worker ) do + if type ( self.worker[k] ) == "function" then + table.insert (submenu, k) + end + end + + return function (viewtable) + local template = haserl.loadfile (template) + return template ( pageinfo, menu, submenu, viewtable, self.session ) + end + end + + -- No template, but have a view + if viewname then + return haserl.loadfile (viewname) + else + return function() end + end +end + +exception_handler = function (self, message ) + local html = require ("html") + if type(message) == "table" then + if message.type == "redir" then + io.write ("Status: 302 Moved\n") + io.write ("Location: " .. ENV["SCRIPT_NAME"] .. + message.prefix .. message.controller .. + "/" .. message.action .. + (message.extra or "" ) .. "\n") + if self.session.id then + io.write (html.cookie.set("sessionid", self.session.id)) + else + io.write (html.cookie.unset("sessionid")) + end + io.write ( "Content-Type: text/html\n\n" ) + elseif message.type == "dispatch" then + parent_exception_handler(self, message) + end + else + parent_exception_handler( self, message) + end +end + +-- create a Configuration Framework Entity (cfe) +-- returns a table with at least "value", "type", "option" and "errtxt" +cfe = function ( optiontable ) + optiontable = optiontable or {} + me = { value="", + type="text", + option="", + errtxt="", + name="" } + for key,value in pairs(optiontable) do + me[key] = value + end + return me +end + + +-- syslog something +logit = function ( ... ) + os.execute ( "logger \"" .. ... .. "\"" ) +end |