Document the members base module.

MODULES.md

@@ -381,6 +381,114 @@ load, parse and interpret its contents.
 
 ### Members Base
 
+This module uses the members directory module to load and parse all
+members files and provides a simple interface for accessing the data.
+
+    (load-members dn [progress?])
+
+* ```dn``` - directory with member files
+* ```progress?``` - if ```#t```, displays loading progress
+
+Loads all member files and creates a members base data structure.
+
+    (members-base-members mb)
+
+* ```mb``` - members base structure
+
+Returns the list of all member records loaded.
+
+    (find-member-by-id mb id)
+
+* ```mb``` - members base structure
+* ```id``` - member identifier (4-digit prime number)
+
+Returns the member record associated with the provided ```id```.
+
+    (find-member-by-nick mb nick)
+
+* ```mb``` - members base structure
+* ```nick``` - member nick
+
+Returns the member record identified by its ```nick```.
+
+    (find-members-by-nick mb nick)
+
+* ```mb``` - members base structure
+* ```nick``` - member nick
+
+Returns the list of all member records with substring matching of
+```nick```. May return empty list, list with one member or multiple
+member records.
+
+    (list-members-ids mb)
+
+* ```mb``` - members base structure
+
+Returns a list of all members' ids.
+
+    (filter-members-by-predicate mb pred)
+
+* ```mb``` - members base structure
+* ```pred``` - predicate procedure
+
+Returns a list of all member records matching the given predicate.
+
+    (list-members-nicks mb)
+
+* ```mb``` - members base structure
+
+Returns a list of all member nicks.
+
+    (members-base-info mb)
+
+* ```mb``` - members base structure
+
+Returns a dictionary with basic information about given members
+base. The dictionary contains the following keys:
+
+* ```'invalid``` - a list of all invalid member records
+* ```'active``` - a list of all active member records
+* ```'suspended``` - a list of all suspended member records
+* ```'students``` - a list of all student member records
+* ```'destroyed``` - a list of all destroyed member records
+* ```'month``` - the current month for this info dictionary
+* ```'total``` - a list of all member records contained
+
+This procedure is used for further printing of information about given
+members base.
+
+    (members-base-stats mb)
+
+* ```mb``` - members base structure
+
+Creates a list of lists of statistical information about given members
+base through time. The first row of the resulting list contains column
+headers and the rows are sorted chronologically by month.
+
+    (get-free-members-ids mb)
+
+* ```mb``` - members base structure
+
+Returns a list of valid member ids which are not already used in given
+members base.
+
+    (gen-member-id mb)
+
+
+* ```mb``` - members base structure
+
+Generates a random 4-digit prime number which is not yet used as a
+member id.
+
+    (members-base-update mb pred? proc)
+
+* ```mb``` - members base structure
+* ```pred?``` - member record predicate
+* ```proc``` - processing procedure
+
+Updates given members base by applying ```proc``` to all member
+records matching ```pred?```.
+
 ### Members Payments Processor
 
 ### Members Info Printer