query.h File Reference

Notmuch query functions. More...

#include <stdbool.h>
#include <stddef.h>

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Enumerations
enum	NmQueryType { NM_QUERY_TYPE_MESGS = 1 , NM_QUERY_TYPE_THREADS , NM_QUERY_TYPE_UNKNOWN }
	Notmuch Query Types. More...
enum	NmWindowQueryRc { NM_WINDOW_QUERY_SUCCESS = 1 , NM_WINDOW_QUERY_INVALID_TIMEBASE , NM_WINDOW_QUERY_INVALID_DURATION }
	Return codes for nm_windowed_query_from_query() More...

Functions
enum NmQueryType	nm_parse_type_from_query (char *buf, enum NmQueryType fallback)
	Parse a query type out of a query.
enum NmQueryType	nm_string_to_query_type (const char *str)
	Lookup a query type.
enum NmQueryType	nm_string_to_query_type_mapper (const char *str)
	Lookup a query type.
const char *	nm_query_type_to_string (enum NmQueryType query_type)
	Turn a query type into a string.
enum NmWindowQueryRc	nm_windowed_query_from_query (char *buf, size_t buflen, const bool force_enable, const short duration, const short current_pos, const char *current_search, const char *timebase, const char *or_terms)
	Windows buf with notmuch date: search term.
bool	nm_query_window_check_timebase (const char *timebase)
	Checks if a given timebase string is valid.

Detailed Description

Notmuch query functions.

Authors

• Austin Ray

Copyright

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file query.h.

Enumeration Type Documentation

NmQueryType

enum NmQueryType

Notmuch Query Types.

Read whole-thread or matching messages only?

Enumerator
NM_QUERY_TYPE_MESGS	Default: Messages only.
NM_QUERY_TYPE_THREADS	Whole threads.
NM_QUERY_TYPE_UNKNOWN	Unknown query type. Error in notmuch query.

Definition at line 34 of file query.h.

{
  NM_QUERY_TYPE_MESGS = 1, 
  NM_QUERY_TYPE_THREADS,   
  NM_QUERY_TYPE_UNKNOWN,   
};

NmWindowQueryRc

enum NmWindowQueryRc

Return codes for nm_windowed_query_from_query()

Enumerator
NM_WINDOW_QUERY_SUCCESS	Query was successful.
NM_WINDOW_QUERY_INVALID_TIMEBASE	Invalid timebase.
NM_WINDOW_QUERY_INVALID_DURATION	Invalid duration.

Definition at line 44 of file query.h.

{
  NM_WINDOW_QUERY_SUCCESS = 1,      
  NM_WINDOW_QUERY_INVALID_TIMEBASE, 
  NM_WINDOW_QUERY_INVALID_DURATION  
};

Function Documentation

nm_parse_type_from_query()

enum NmQueryType nm_parse_type_from_query	(	char *	buf,
		enum NmQueryType	fallback
	)

Parse a query type out of a query.

Parameters

buf	Buffer for URL
fallback	Fallback query type if buf doesn't contain a type= statement

Return values

enum	NmQueryType, Notmuch query type

If a user writes a query for a vfolder and includes a type= statement, that type= will be encoded, which Notmuch will treat as part of the query= statement. This method will remove the type= and return its corresponding NmQueryType representation.

Definition at line 49 of file query.c.

{
  enum NmQueryType query_type = fallback;
 
  if (!buf)
    return query_type;
 
  size_t buflen = mutt_str_len(buf);
  const char *message_ptr = mutt_istrn_rfind(buf, buflen, "type=messages");
  const char *thread_ptr = mutt_istrn_rfind(buf, buflen, "type=threads");
 
  // No valid type statement found.
  if (!message_ptr && !thread_ptr)
    return query_type;
 
  // Determine the last valid "type=" statement.
  if ((!message_ptr && thread_ptr) || (thread_ptr > message_ptr))
  {
    query_type = NM_QUERY_TYPE_THREADS;
  }
  else
  {
    query_type = NM_QUERY_TYPE_MESGS;
  }
 
  // Clean-up any valid "type=" statements.
  // The six variations of how "type=" could appear.
  const char *variants[6] = { "&type=threads", "&type=messages",
                              "type=threads&", "type=messages&",
                              "type=threads",  "type=messages" };
  int variants_size = mutt_array_size(variants);
 
  for (int i = 0; i < variants_size; i++)
  {
    mutt_istr_remall(buf, variants[i]);
  }
 
  return query_type;
}

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nm_string_to_query_type()

enum NmQueryType nm_string_to_query_type

(

const char *

str

)

Lookup a query type.

Parameters

str	String to lookup

Return values

enum	NmQueryType, e.g. NM_QUERY_TYPE_MESGS

If there's an unknown query type, default to NM_QUERY_TYPE_MESGS.

Definition at line 110 of file query.c.

{
  enum NmQueryType query_type = nm_string_to_query_type_mapper(str);
 
  if (query_type == NM_QUERY_TYPE_UNKNOWN)
  {
    mutt_error(_("failed to parse notmuch query type: %s"), NONULL(str));
    return NM_QUERY_TYPE_MESGS;
  }
 
  return query_type;
}

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nm_string_to_query_type_mapper()

enum NmQueryType nm_string_to_query_type_mapper

(

const char *

str

)

Lookup a query type.

Parameters

str	String to lookup

Return values

num	Query type
NM_QUERY_TYPE_UNKNOWN	on error

Definition at line 129 of file query.c.

{
  if (mutt_str_equal(str, "threads"))
    return NM_QUERY_TYPE_THREADS;
  if (mutt_str_equal(str, "messages"))
    return NM_QUERY_TYPE_MESGS;
 
  return NM_QUERY_TYPE_UNKNOWN;
}

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nm_query_type_to_string()

const char * nm_query_type_to_string

(

enum NmQueryType

query_type

)

Turn a query type into a string.

Parameters

query_type

Query type

Return values

ptr

String

Note

This is a static string and must not be freed.

Definition at line 96 of file query.c.

{
  if (query_type == NM_QUERY_TYPE_THREADS)
    return "threads";
  return "messages";
}

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nm_windowed_query_from_query()

enum NmWindowQueryRc nm_windowed_query_from_query	(	char *	buf,
		size_t	buflen,
		const bool	force_enable,
		const short	duration,
		const short	cur_pos,
		const char *	cur_search,
		const char *	timebase,
		const char *	or_terms
	)

Windows buf with notmuch date: search term.

Parameters

[out]	buf	allocated string buffer to receive the modified search query
[in]	buflen	allocated maximum size of the buf string buffer
[in]	force_enable	Enables windowing for duration=0
[in]	duration	Duration of time between beginning and end for notmuch date search term
[in]	cur_pos	Current position of vfolder window
[in]	cur_search	Current notmuch search
[in]	timebase	Timebase for date: search term. Must be: hour, day, week, month, or year
[in]	or_terms	Additional notmuch search terms

Return values

NM_WINDOW_QUERY_SUCCESS	Prepended buf with date: search term
NM_WINDOW_QUERY_INVALID_DURATION	Duration out-of-range for search term. buf not prepended with date:
NM_WINDOW_QUERY_INVALID_TIMEBASE	Timebase isn't one of hour, day, week, month, or year

This is where the magic of windowed queries happens. Taking a vfolder search query string as parameter, it will use the following two user settings:

• duration and
• timebase

to amend given vfolder search window. Then using a third parameter:

• cur_pos

it will generate a proper notmuch date: parameter. For example, given a duration of 2, a timebase set to week and a position defaulting to 0, it will prepend to the 'tag:inbox' notmuch search query the following string:

• query: tag:inbox
• buf: date:2week..now and tag:inbox

If the position is set to 4, with duration=3 and timebase=month:

• query: tag:archived
• buf: date:12month..9month and tag:archived

The window won't be applied:

• If the duration of the search query is set to 0 this function will be disabled unless a user explicitly enables windowed queries. This returns NM_WINDOW_QUERY_INVALID_DURATION
• If the timebase is invalid, it will return NM_WINDOW_QUERY_INVALID_TIMEBASE

Definition at line 206 of file query.c.

{
  // if the duration is a non positive integer, disable the window unless the
  // user explicitly enables windowed queries.
  if (!force_enable && (duration <= 0))
  {
    return NM_WINDOW_QUERY_INVALID_DURATION;
  }
 
  int beg = duration * (cur_pos + 1);
  int end = duration * cur_pos;
 
  // If the duration is 0, we want to generate a query spanning a single timebase.
  // For example, `date:1month..1month` spans the previous month.
  if ((duration == 0) && (cur_pos != 0))
  {
    end = cur_pos;
    beg = end;
  }
 
  if (!nm_query_window_check_timebase(timebase))
  {
    return NM_WINDOW_QUERY_INVALID_TIMEBASE;
  }
 
  size_t length = 0;
  if (end == 0)
  {
    // Open-ended date allows mail from the future.
    // This may occur is the sender's time settings are off.
    length = snprintf(buf, buflen, "date:%d%s..", beg, timebase);
  }
  else
  {
    length = snprintf(buf, buflen, "date:%d%s..%d%s", beg, timebase, end, timebase);
  }
 
  if (!mutt_str_equal(or_terms, ""))
  {
    char *date_part = mutt_str_dup(buf);
    length = snprintf(buf, buflen, "(%s or (%s))", date_part, or_terms);
    FREE(&date_part);
  }
 
  // Add current search to window query.
  snprintf(buf + length, buflen - length, " and %s", cur_search);
 
  return NM_WINDOW_QUERY_SUCCESS;
}

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nm_query_window_check_timebase()

bool nm_query_window_check_timebase

(

const char *

timebase

)

Checks if a given timebase string is valid.

Parameters

[in]

timebase

string containing a time base

Return values

true	The given time base is valid

This function returns whether a given timebase string is valid or not, which is used to validate the user settable configuration setting:

nm_query_window_timebase

Definition at line 149 of file query.c.

{
  if ((mutt_str_equal(timebase, "hour")) || (mutt_str_equal(timebase, "day")) ||
      (mutt_str_equal(timebase, "week")) ||
      (mutt_str_equal(timebase, "month")) || (mutt_str_equal(timebase, "year")))
  {
    return true;
  }
  return false;
}

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