From bbc986be5425c6abdddb6eaab6dca1b5054c43e0 Mon Sep 17 00:00:00 2001
From: Jeffrey Armstrong <jeff@approximatrix.com>
Date: Mon, 17 May 2021 10:16:40 -0400
Subject: Added pager to jobs list on instructions page as well.

---
 captain/requtils.f90 | 126 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)

(limited to 'captain/requtils.f90')

diff --git a/captain/requtils.f90 b/captain/requtils.f90
index d2ffb29..1af605f 100644
--- a/captain/requtils.f90
+++ b/captain/requtils.f90
@@ -186,6 +186,132 @@ contains
     
     end function request_static
     
+    function build_link(link, label, gemini_mode) result(res)
+    implicit none
+        
+        character(*), intent(in)::link, label
+        logical,  intent(in)::gemini_mode
+        character(len=:), pointer::res
+        integer::nl
+        
+        if(gemini_mode) then
+        
+            nl = len_trim(link) + len_trim(label) + len('=>  ')
+            allocate(character(len=nl)::res)
+            res = '=> '//trim(link)//' '//trim(label)
+            
+        else
+        
+            nl = len_trim(link) + len_trim(label) + len('<a href=""></a>')
+            allocate(character(len=nl)::res)
+            res = '<a href="'//trim(link)//'">'//trim(label)//'</a>'
+        
+        end if
+    
+    end function build_link
+    
+    function generate_simple_pager(startindex, stopindex, step, maxcount, page, gemini_mode) result(res)
+    use logging
+    implicit none
+    
+        integer, intent(in)::startindex, stopindex, step, maxcount
+        character(*), intent(in)::page
+        logical, intent(in)::gemini_mode
+        character(len=:), pointer::res
+        
+        integer::i
+        character(len=:), allocatable::back_page, forward_page
+        character(len=:), pointer::back_link, forward_link
+        character(5)::num
+        integer::res_size
+        
+        res_size = 128
+        
+        back_link => null()
+        forward_link => null()
+        
+        if(startindex > 1) then
+            i = max(startindex-step, 1)
+            allocate(character(len=(len_trim(page)+6)) :: back_page)
+            write(num, '(I5)') i
+            num = adjustl(num)
+            back_page = trim(page)//"?"//trim(num)
+            back_link => build_link(back_page, "Newer", gemini_mode)
+            deallocate(back_page)
+        end if
+        
+        if(stopindex < maxcount) then
+            i = stopindex+1
+            allocate(character(len=(len_trim(page)+6)) :: forward_page)
+            write(num, '(I5)') i
+            num = adjustl(num)
+            forward_page = trim(page)//"?"//trim(num)
+            forward_link => build_link(forward_page, "Older", gemini_mode)
+            deallocate(forward_page)
+        end if
+    
+        if(.not. associated(back_link) .and. .not. associated(forward_link)) then
+        
+            res => null()
+            
+        else
+        
+            if(gemini_mode) then
+                res_size = 1
+            else
+                res_size = len('<p class="pager"> - </p>')
+            end if
+            
+            if(associated(back_link)) then
+                res_size = res_size + len(back_link)
+            end if
+            if(associated(forward_link)) then
+                res_size = res_size + len(forward_link)
+            end if
+            
+            allocate(character(len=res_size) :: res)
+            res = " "
+             
+            if(gemini_mode) then
+                
+                if(associated(back_link)) then
+                    res = back_link
+                    deallocate(back_link)
+                end if
+                
+                if(associated(forward_link)) then
+                    if(len_trim(res) > 0) then
+                        res = trim(res)//new_line(' ')//forward_link
+                    else
+                        res = forward_link
+                    end if
+                    deallocate(forward_link)
+                end if
+                
+            else
+            
+                if(associated(back_link)) then
+                    res = '<p class="pager">'//back_link
+                    deallocate(back_link)
+                end if
+                
+                if(associated(forward_link)) then
+                    if(len_trim(res) > 0) then
+                        res = trim(res)//" - "//forward_link
+                    else
+                        res = '<p class="pager">'//forward_link
+                    end if
+                    deallocate(forward_link)
+                end if
+                
+                res = trim(res)//"</p>"
+            
+            end if
+            
+        end if
+    
+    end function generate_simple_pager
+    
     function render_jobs_links(jobs, startindex, stopindex, gemini_mode, link_prefix) result(res)
     use captain_db
     implicit none
-- 
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